diff --git a/codeGenCpu6502/src/prog8/codegen/cpu6502/AssemblyProgram.kt b/codeGenCpu6502/src/prog8/codegen/cpu6502/AssemblyProgram.kt
index 37f553bc7..1b6b84195 100644
--- a/codeGenCpu6502/src/prog8/codegen/cpu6502/AssemblyProgram.kt
+++ b/codeGenCpu6502/src/prog8/codegen/cpu6502/AssemblyProgram.kt
@@ -94,13 +94,13 @@ class AssemblyProgram(
 internal fun loadAsmIncludeFile(filename: String, source: SourceCode): Result<String, NoSuchFileException> {
     return if (filename.startsWith(SourceCode.libraryFilePrefix)) {
         return com.github.michaelbull.result.runCatching {
-            SourceCode.Resource("/prog8lib/${filename.substring(SourceCode.libraryFilePrefix.length)}").readText()
+            SourceCode.Resource("/prog8lib/${filename.substring(SourceCode.libraryFilePrefix.length)}").text
         }.mapError { NoSuchFileException(File(filename)) }
     } else {
         val sib = Path(source.origin).resolveSibling(filename)
         if (sib.isRegularFile())
-            Ok(SourceCode.File(sib).readText())
+            Ok(SourceCode.File(sib).text)
         else
-            Ok(SourceCode.File(Path(filename)).readText())
+            Ok(SourceCode.File(Path(filename)).text)
     }
 }
diff --git a/codeGenCpu6502/src/prog8/codegen/cpu6502/BuiltinFunctionsAsmGen.kt b/codeGenCpu6502/src/prog8/codegen/cpu6502/BuiltinFunctionsAsmGen.kt
index 6d5da5126..33946d83e 100644
--- a/codeGenCpu6502/src/prog8/codegen/cpu6502/BuiltinFunctionsAsmGen.kt
+++ b/codeGenCpu6502/src/prog8/codegen/cpu6502/BuiltinFunctionsAsmGen.kt
@@ -11,11 +11,6 @@ import prog8.ast.statements.FunctionCallStatement
 import prog8.ast.statements.Subroutine
 import prog8.ast.toHex
 import prog8.codegen.cpu6502.assignment.*
-import prog8.codegen.cpu6502.assignment.AsmAssignSource
-import prog8.codegen.cpu6502.assignment.AsmAssignTarget
-import prog8.codegen.cpu6502.assignment.AsmAssignment
-import prog8.codegen.cpu6502.assignment.AssignmentAsmGen
-import prog8.codegen.cpu6502.assignment.SourceStorageKind
 import prog8.compilerinterface.AssemblyError
 import prog8.compilerinterface.BuiltinFunctions
 import prog8.compilerinterface.CpuType
diff --git a/codeGenTargets/src/prog8/codegen/target/C128Target.kt b/codeGenTargets/src/prog8/codegen/target/C128Target.kt
index 379475814..f2047827c 100644
--- a/codeGenTargets/src/prog8/codegen/target/C128Target.kt
+++ b/codeGenTargets/src/prog8/codegen/target/C128Target.kt
@@ -7,9 +7,9 @@ import prog8.ast.base.WordDatatypes
 import prog8.ast.expressions.Expression
 import prog8.ast.statements.RegisterOrStatusflag
 import prog8.ast.statements.Subroutine
+import prog8.codegen.target.c128.C128MachineDefinition
 import prog8.codegen.target.cbm.asmsub6502ArgsEvalOrder
 import prog8.codegen.target.cbm.asmsub6502ArgsHaveRegisterClobberRisk
-import prog8.codegen.target.c128.C128MachineDefinition
 import prog8.compilerinterface.ICompilationTarget
 import prog8.compilerinterface.IStringEncoding
 
diff --git a/codeGenTargets/src/prog8/codegen/target/C64Target.kt b/codeGenTargets/src/prog8/codegen/target/C64Target.kt
index f49efb0b8..9c49c361b 100644
--- a/codeGenTargets/src/prog8/codegen/target/C64Target.kt
+++ b/codeGenTargets/src/prog8/codegen/target/C64Target.kt
@@ -7,9 +7,9 @@ import prog8.ast.base.WordDatatypes
 import prog8.ast.expressions.Expression
 import prog8.ast.statements.RegisterOrStatusflag
 import prog8.ast.statements.Subroutine
+import prog8.codegen.target.c64.C64MachineDefinition
 import prog8.codegen.target.cbm.asmsub6502ArgsEvalOrder
 import prog8.codegen.target.cbm.asmsub6502ArgsHaveRegisterClobberRisk
-import prog8.codegen.target.c64.C64MachineDefinition
 import prog8.compilerinterface.ICompilationTarget
 import prog8.compilerinterface.IStringEncoding
 
diff --git a/codeGenTargets/src/prog8/codegen/target/cbm/AsmsubHelpers.kt b/codeGenTargets/src/prog8/codegen/target/cbm/AsmsubHelpers.kt
index f4ce9510e..f00d4ff56 100644
--- a/codeGenTargets/src/prog8/codegen/target/cbm/AsmsubHelpers.kt
+++ b/codeGenTargets/src/prog8/codegen/target/cbm/AsmsubHelpers.kt
@@ -2,7 +2,9 @@ package prog8.codegen.target.cbm
 
 import prog8.ast.base.Cx16VirtualRegisters
 import prog8.ast.base.RegisterOrPair
-import prog8.ast.expressions.*
+import prog8.ast.expressions.ArrayIndexedExpression
+import prog8.ast.expressions.Expression
+import prog8.ast.expressions.FunctionCallExpression
 import prog8.ast.statements.RegisterOrStatusflag
 import prog8.ast.statements.Subroutine
 
diff --git a/codeGenTargets/src/prog8/codegen/target/cbm/IsoEncoding.kt b/codeGenTargets/src/prog8/codegen/target/cbm/IsoEncoding.kt
index 854076924..ba2b8d686 100644
--- a/codeGenTargets/src/prog8/codegen/target/cbm/IsoEncoding.kt
+++ b/codeGenTargets/src/prog8/codegen/target/cbm/IsoEncoding.kt
@@ -1,8 +1,8 @@
 package prog8.codegen.target.cbm
 
-import com.github.michaelbull.result.Result
-import com.github.michaelbull.result.Ok
 import com.github.michaelbull.result.Err
+import com.github.michaelbull.result.Ok
+import com.github.michaelbull.result.Result
 import java.io.CharConversionException
 import java.nio.charset.Charset
 
diff --git a/codeOptimizers/src/prog8/optimizer/BinExprSplitter.kt b/codeOptimizers/src/prog8/optimizer/BinExprSplitter.kt
index f4e15e2d8..98ded5a3c 100644
--- a/codeOptimizers/src/prog8/optimizer/BinExprSplitter.kt
+++ b/codeOptimizers/src/prog8/optimizer/BinExprSplitter.kt
@@ -5,10 +5,10 @@ import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.base.DataType
 import prog8.ast.base.FatalAstException
+import prog8.ast.expressions.AugmentAssignmentOperators
 import prog8.ast.expressions.BinaryExpression
 import prog8.ast.expressions.IdentifierReference
 import prog8.ast.expressions.TypecastExpression
-import prog8.ast.expressions.AugmentAssignmentOperators
 import prog8.ast.statements.AssignTarget
 import prog8.ast.statements.Assignment
 import prog8.ast.statements.AssignmentOrigin
diff --git a/codeOptimizers/src/prog8/optimizer/StatementOptimizer.kt b/codeOptimizers/src/prog8/optimizer/StatementOptimizer.kt
index ed233db13..575d0ac68 100644
--- a/codeOptimizers/src/prog8/optimizer/StatementOptimizer.kt
+++ b/codeOptimizers/src/prog8/optimizer/StatementOptimizer.kt
@@ -1,7 +1,10 @@
 package prog8.optimizer
 
 import prog8.ast.*
-import prog8.ast.base.*
+import prog8.ast.base.ArrayDatatypes
+import prog8.ast.base.DataType
+import prog8.ast.base.IntegerDatatypes
+import prog8.ast.base.VarDeclType
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
 import prog8.ast.walk.AstWalker
diff --git a/compiler/src/prog8/CompilerMain.kt b/compiler/src/prog8/CompilerMain.kt
index 19bc82873..977469148 100644
--- a/compiler/src/prog8/CompilerMain.kt
+++ b/compiler/src/prog8/CompilerMain.kt
@@ -3,11 +3,11 @@ package prog8
 import kotlinx.cli.*
 import prog8.ast.base.AstException
 import prog8.codegen.target.C128Target
+import prog8.codegen.target.C64Target
+import prog8.codegen.target.Cx16Target
 import prog8.compiler.CompilationResult
 import prog8.compiler.CompilerArguments
 import prog8.compiler.compileProgram
-import prog8.codegen.target.C64Target
-import prog8.codegen.target.Cx16Target
 import java.io.File
 import java.nio.file.FileSystems
 import java.nio.file.Path
diff --git a/compiler/src/prog8/compiler/Compiler.kt b/compiler/src/prog8/compiler/Compiler.kt
index 583771236..36da2cfe0 100644
--- a/compiler/src/prog8/compiler/Compiler.kt
+++ b/compiler/src/prog8/compiler/Compiler.kt
@@ -1,6 +1,6 @@
 package prog8.compiler
 
-import com.github.michaelbull.result.*
+import com.github.michaelbull.result.onFailure
 import prog8.ast.AstToSourceTextConverter
 import prog8.ast.IBuiltinFunctions
 import prog8.ast.Program
@@ -11,9 +11,9 @@ import prog8.ast.expressions.NumericLiteralValue
 import prog8.ast.statements.Directive
 import prog8.codegen.cpu6502.AsmGen
 import prog8.codegen.target.C128Target
-import prog8.compiler.astprocessing.*
 import prog8.codegen.target.C64Target
 import prog8.codegen.target.Cx16Target
+import prog8.compiler.astprocessing.*
 import prog8.compilerinterface.*
 import prog8.optimizer.*
 import prog8.parser.ParseError
diff --git a/compiler/src/prog8/compiler/astprocessing/AstPreprocessor.kt b/compiler/src/prog8/compiler/astprocessing/AstPreprocessor.kt
index aaa08f4f2..7da635464 100644
--- a/compiler/src/prog8/compiler/astprocessing/AstPreprocessor.kt
+++ b/compiler/src/prog8/compiler/astprocessing/AstPreprocessor.kt
@@ -2,7 +2,9 @@ package prog8.compiler.astprocessing
 
 import prog8.ast.Node
 import prog8.ast.Program
-import prog8.ast.base.*
+import prog8.ast.base.NumericDatatypes
+import prog8.ast.base.SyntaxError
+import prog8.ast.base.VarDeclType
 import prog8.ast.expressions.*
 import prog8.ast.statements.*
 import prog8.ast.walk.AstWalker
diff --git a/compiler/src/prog8/compiler/astprocessing/AstVariousTransforms.kt b/compiler/src/prog8/compiler/astprocessing/AstVariousTransforms.kt
index caa61e2d3..f1d737cbb 100644
--- a/compiler/src/prog8/compiler/astprocessing/AstVariousTransforms.kt
+++ b/compiler/src/prog8/compiler/astprocessing/AstVariousTransforms.kt
@@ -7,7 +7,10 @@ import prog8.ast.expressions.ArrayIndexedExpression
 import prog8.ast.expressions.BinaryExpression
 import prog8.ast.expressions.DirectMemoryRead
 import prog8.ast.expressions.StringLiteralValue
-import prog8.ast.statements.*
+import prog8.ast.statements.AssignTarget
+import prog8.ast.statements.DirectMemoryWrite
+import prog8.ast.statements.Subroutine
+import prog8.ast.statements.VarDecl
 import prog8.ast.walk.AstWalker
 import prog8.ast.walk.IAstModification
 
diff --git a/compiler/src/prog8/compiler/astprocessing/CodeDesugarer.kt b/compiler/src/prog8/compiler/astprocessing/CodeDesugarer.kt
index da27a9d8a..778fb7ea2 100644
--- a/compiler/src/prog8/compiler/astprocessing/CodeDesugarer.kt
+++ b/compiler/src/prog8/compiler/astprocessing/CodeDesugarer.kt
@@ -6,11 +6,14 @@ import prog8.ast.Node
 import prog8.ast.Program
 import prog8.ast.base.ParentSentinel
 import prog8.ast.base.Position
-import prog8.ast.expressions.*
+import prog8.ast.expressions.DirectMemoryRead
+import prog8.ast.expressions.FunctionCallExpression
+import prog8.ast.expressions.IdentifierReference
+import prog8.ast.expressions.PrefixExpression
 import prog8.ast.statements.*
 import prog8.ast.walk.AstWalker
 import prog8.ast.walk.IAstModification
-import prog8.compilerinterface.*
+import prog8.compilerinterface.IErrorReporter
 
 
 internal class CodeDesugarer(val program: Program, private val errors: IErrorReporter) : AstWalker() {
diff --git a/compiler/src/prog8/compiler/astprocessing/VariousCleanups.kt b/compiler/src/prog8/compiler/astprocessing/VariousCleanups.kt
index 94f3d9bd1..55b662d30 100644
--- a/compiler/src/prog8/compiler/astprocessing/VariousCleanups.kt
+++ b/compiler/src/prog8/compiler/astprocessing/VariousCleanups.kt
@@ -8,7 +8,9 @@ import prog8.ast.base.ArrayDatatypes
 import prog8.ast.base.DataType
 import prog8.ast.base.FatalAstException
 import prog8.ast.expressions.*
-import prog8.ast.statements.*
+import prog8.ast.statements.AnonymousScope
+import prog8.ast.statements.Assignment
+import prog8.ast.statements.FunctionCallStatement
 import prog8.ast.walk.AstWalker
 import prog8.ast.walk.IAstModification
 import prog8.compilerinterface.CompilationOptions
diff --git a/compiler/test/ModuleImporterTests.kt b/compiler/test/ModuleImporterTests.kt
index 8a1dfcd46..55bfa8b31 100644
--- a/compiler/test/ModuleImporterTests.kt
+++ b/compiler/test/ModuleImporterTests.kt
@@ -2,13 +2,6 @@ package prog8tests
 
 import com.github.michaelbull.result.getErrorOrElse
 import com.github.michaelbull.result.getOrElse
-import prog8.ast.Program
-import prog8.ast.internedStringsModuleName
-import prog8.compiler.ModuleImporter
-import prog8.compilerinterface.IErrorReporter
-import prog8.parser.ParseError
-import prog8.parser.SourceCode
-import kotlin.io.path.*
 import io.kotest.assertions.fail
 import io.kotest.assertions.throwables.shouldThrow
 import io.kotest.assertions.withClue
@@ -16,11 +9,14 @@ import io.kotest.core.spec.style.FunSpec
 import io.kotest.matchers.collections.shouldBeIn
 import io.kotest.matchers.shouldBe
 import io.kotest.matchers.string.shouldContain
+import prog8.ast.Program
+import prog8.ast.internedStringsModuleName
+import prog8.compiler.ModuleImporter
+import prog8.compilerinterface.IErrorReporter
+import prog8.parser.ParseError
+import prog8.parser.SourceCode
 import prog8tests.helpers.*
-import prog8tests.helpers.DummyFunctions
-import prog8tests.helpers.DummyMemsizer
-import prog8tests.helpers.DummyStringEncoder
-import prog8tests.helpers.ErrorReporterForTests
+import kotlin.io.path.*
 
 
 class TestModuleImporter: FunSpec({
@@ -71,7 +67,7 @@ class TestModuleImporter: FunSpec({
                 val searchIn = Path(".", "$srcPathRel").invariantSeparatorsPathString
                 val importer = makeImporter(null, searchIn)
 
-                shouldThrow<AccessDeniedException> { importer.importModule(srcPathRel) }
+                shouldThrow<FileSystemException> { importer.importModule(srcPathRel) }
                     .let {
                         withClue(".file should be normalized") {
                             "${it.file}" shouldBe "${it.file.normalize()}"
@@ -82,7 +78,7 @@ class TestModuleImporter: FunSpec({
                     }
                 program.modules.size shouldBe 1
 
-                shouldThrow<AccessDeniedException> { importer.importModule(srcPathAbs) }
+                shouldThrow<FileSystemException> { importer.importModule(srcPathAbs) }
                     .let {
                         withClue(".file should be normalized") {
                             "${it.file}" shouldBe "${it.file.normalize()}"
diff --git a/compiler/test/ProjectConfig.kt b/compiler/test/ProjectConfig.kt
index 1ff8e9209..5e368549f 100644
--- a/compiler/test/ProjectConfig.kt
+++ b/compiler/test/ProjectConfig.kt
@@ -1,14 +1,6 @@
 package prog8tests
 
 import io.kotest.core.config.AbstractProjectConfig
-import io.kotest.core.listeners.Listener
-import io.kotest.core.listeners.TestListener
-import io.kotest.core.spec.Spec
-import io.kotest.extensions.system.NoSystemErrListener
-import io.kotest.extensions.system.NoSystemOutListener
-import java.io.ByteArrayOutputStream
-import java.io.PrintStream
-import kotlin.math.max
 
 object ProjectConfig : AbstractProjectConfig() {
     override val parallelism = 2 // max(2, Runtime.getRuntime().availableProcessors() / 2)
diff --git a/compiler/test/TestCompilerOnExamples.kt b/compiler/test/TestCompilerOnExamples.kt
index 680b87f9a..cb4adeef3 100644
--- a/compiler/test/TestCompilerOnExamples.kt
+++ b/compiler/test/TestCompilerOnExamples.kt
@@ -1,14 +1,13 @@
 package prog8tests
 
 import io.kotest.core.spec.style.FunSpec
+import prog8.codegen.target.C64Target
+import prog8.codegen.target.Cx16Target
 import prog8.compiler.CompilationResult
 import prog8.compiler.CompilerArguments
 import prog8.compiler.compileProgram
-import prog8.codegen.target.C64Target
-import prog8.codegen.target.Cx16Target
 import prog8.compilerinterface.ICompilationTarget
 import prog8tests.helpers.*
-import prog8tests.helpers.assertSuccess
 import java.nio.file.Path
 import kotlin.io.path.absolute
 import kotlin.io.path.exists
diff --git a/compiler/test/TestCompilerOnRanges.kt b/compiler/test/TestCompilerOnRanges.kt
index 089b37bc3..b5ebe713c 100644
--- a/compiler/test/TestCompilerOnRanges.kt
+++ b/compiler/test/TestCompilerOnRanges.kt
@@ -7,17 +7,16 @@ import io.kotest.matchers.string.shouldContain
 import io.kotest.matchers.types.instanceOf
 import prog8.ast.base.DataType
 import prog8.ast.base.Position
-import prog8.ast.expressions.*
+import prog8.ast.expressions.ArrayLiteralValue
+import prog8.ast.expressions.IdentifierReference
+import prog8.ast.expressions.NumericLiteralValue
+import prog8.ast.expressions.RangeExpression
 import prog8.ast.statements.ForLoop
 import prog8.ast.statements.VarDecl
 import prog8.codegen.target.C64Target
 import prog8.codegen.target.Cx16Target
 import prog8.compilerinterface.Encoding
 import prog8tests.helpers.*
-import prog8tests.helpers.ErrorReporterForTests
-import prog8tests.helpers.assertFailure
-import prog8tests.helpers.assertSuccess
-import prog8tests.helpers.compileText
 
 
 /**
diff --git a/compiler/test/TestCompilerOptionLibdirs.kt b/compiler/test/TestCompilerOptionLibdirs.kt
index d11d29575..67c529ab5 100644
--- a/compiler/test/TestCompilerOptionLibdirs.kt
+++ b/compiler/test/TestCompilerOptionLibdirs.kt
@@ -1,12 +1,11 @@
 package prog8tests
 
 import io.kotest.core.spec.style.FunSpec
+import prog8.codegen.target.Cx16Target
 import prog8.compiler.CompilationResult
 import prog8.compiler.CompilerArguments
 import prog8.compiler.compileProgram
-import prog8.codegen.target.Cx16Target
 import prog8tests.helpers.*
-import prog8tests.helpers.assertSuccess
 import java.nio.file.Path
 import kotlin.io.path.absolute
 import kotlin.io.path.createTempFile
diff --git a/compiler/test/TestImportedModulesOrderAndOptions.kt b/compiler/test/TestImportedModulesOrderAndOptions.kt
index 369d03977..e468c6828 100644
--- a/compiler/test/TestImportedModulesOrderAndOptions.kt
+++ b/compiler/test/TestImportedModulesOrderAndOptions.kt
@@ -5,9 +5,9 @@ import io.kotest.core.spec.style.FunSpec
 import io.kotest.matchers.shouldBe
 import io.kotest.matchers.string.shouldStartWith
 import prog8.ast.internedStringsModuleName
+import prog8.codegen.target.C64Target
 import prog8.compiler.determineCompilationOptions
 import prog8.compiler.parseImports
-import prog8.codegen.target.C64Target
 import prog8.compilerinterface.ZeropageType
 import prog8tests.helpers.ErrorReporterForTests
 import prog8tests.helpers.assertSuccess
diff --git a/compiler/test/TestMemory.kt b/compiler/test/TestMemory.kt
index 87a253768..4253bbaa9 100644
--- a/compiler/test/TestMemory.kt
+++ b/compiler/test/TestMemory.kt
@@ -12,15 +12,11 @@ import prog8.ast.expressions.IdentifierReference
 import prog8.ast.expressions.NumericLiteralValue
 import prog8.ast.expressions.PrefixExpression
 import prog8.ast.statements.*
-import prog8.compiler.printProgram
 import prog8.codegen.target.C64Target
+import prog8.compiler.printProgram
 import prog8.compilerinterface.isIOAddress
 import prog8.parser.SourceCode
 import prog8tests.helpers.*
-import prog8tests.helpers.DummyFunctions
-import prog8tests.helpers.DummyMemsizer
-import prog8tests.helpers.DummyStringEncoder
-import prog8tests.helpers.compileText
 
 
 class TestMemory: FunSpec({
diff --git a/compiler/test/TestSubroutines.kt b/compiler/test/TestSubroutines.kt
index 9622760bb..86071384d 100644
--- a/compiler/test/TestSubroutines.kt
+++ b/compiler/test/TestSubroutines.kt
@@ -7,7 +7,10 @@ import io.kotest.matchers.shouldNotBe
 import io.kotest.matchers.string.shouldContain
 import io.kotest.matchers.types.instanceOf
 import prog8.ast.base.DataType
-import prog8.ast.expressions.*
+import prog8.ast.expressions.BinaryExpression
+import prog8.ast.expressions.DirectMemoryRead
+import prog8.ast.expressions.IdentifierReference
+import prog8.ast.expressions.NumericLiteralValue
 import prog8.ast.statements.*
 import prog8.codegen.target.C64Target
 import prog8tests.helpers.ErrorReporterForTests
diff --git a/compiler/test/ZeropageTests.kt b/compiler/test/ZeropageTests.kt
index 18498cc59..0d75eb9a8 100644
--- a/compiler/test/ZeropageTests.kt
+++ b/compiler/test/ZeropageTests.kt
@@ -20,7 +20,6 @@ import prog8.codegen.target.cx16.CX16Zeropage
 import prog8.compilerinterface.*
 import prog8tests.helpers.DummyCompilationTarget
 import prog8tests.helpers.ErrorReporterForTests
-import java.lang.IllegalArgumentException
 
 
 class TestAbstractZeropage: FunSpec({
diff --git a/compiler/test/ast/TestProg8Parser.kt b/compiler/test/ast/TestProg8Parser.kt
index 5e55115fb..90e765082 100644
--- a/compiler/test/ast/TestProg8Parser.kt
+++ b/compiler/test/ast/TestProg8Parser.kt
@@ -26,7 +26,6 @@ import prog8.parser.ParseError
 import prog8.parser.Prog8Parser.parseModule
 import prog8.parser.SourceCode
 import prog8tests.helpers.*
-import prog8tests.helpers.DummyFunctions
 import kotlin.io.path.Path
 import kotlin.io.path.isRegularFile
 import kotlin.io.path.name
diff --git a/compiler/test/ast/TestSourceCode.kt b/compiler/test/ast/TestSourceCode.kt
index f34b8e0ab..903a6efa9 100644
--- a/compiler/test/ast/TestSourceCode.kt
+++ b/compiler/test/ast/TestSourceCode.kt
@@ -21,10 +21,9 @@ class TestSourceCode: AnnotationSpec() {
             main { }
         """
         val src = SourceCode.Text(text)
-        val actualText = src.getCharStream().toString()
 
         src.origin shouldContain Regex("^<String@[0-9a-f\\-]+>$")
-        actualText shouldBe text
+        src.text shouldBe text
         src.isFromResources shouldBe false
         src.isFromFilesystem shouldBe false
         src.toString().startsWith("prog8.parser.SourceCode") shouldBe true
@@ -46,7 +45,7 @@ class TestSourceCode: AnnotationSpec() {
 
     @Test
     fun testFromPathWithDirectory() {
-        shouldThrow<AccessDeniedException> { SourceCode.File(fixturesDir) }
+        shouldThrow<FileSystemException> { SourceCode.File(fixturesDir) }
     }
 
     @Test
@@ -56,7 +55,7 @@ class TestSourceCode: AnnotationSpec() {
         val src = SourceCode.File(path)
         val expectedOrigin = SourceCode.relative(path).toString()
         src.origin shouldBe expectedOrigin
-        src.readText() shouldBe path.toFile().readText()
+        src.text shouldBe path.toFile().readText()
         src.isFromResources shouldBe false
         src.isFromFilesystem shouldBe true
     }
@@ -69,7 +68,7 @@ class TestSourceCode: AnnotationSpec() {
         val src = SourceCode.File(path)
         val expectedOrigin = SourceCode.relative(path).toString()
         src.origin shouldBe expectedOrigin
-        src.readText() shouldBe srcFile.readText()
+        src.text shouldBe srcFile.readText()
     }
 
     @Test
@@ -79,7 +78,7 @@ class TestSourceCode: AnnotationSpec() {
         val src = SourceCode.Resource(pathString)
 
         src.origin shouldBe "$libraryFilePrefix/$pathString"
-        src.readText() shouldBe srcFile.readText()
+        src.text shouldBe srcFile.readText()
         src.isFromResources shouldBe true
         src.isFromFilesystem shouldBe false
     }
@@ -91,7 +90,7 @@ class TestSourceCode: AnnotationSpec() {
         val src = SourceCode.Resource(pathString)
 
         src.origin shouldBe "$libraryFilePrefix$pathString"
-        src.readText() shouldBe srcFile.readText()
+        src.text shouldBe srcFile.readText()
     }
 
     @Test
@@ -101,7 +100,7 @@ class TestSourceCode: AnnotationSpec() {
         val src = SourceCode.Resource(pathString)
 
         src.origin shouldBe "$libraryFilePrefix/$pathString"
-        src.readText() shouldBe srcFile.readText()
+        src.text shouldBe srcFile.readText()
         src.isFromResources shouldBe true
     }
 
@@ -112,7 +111,7 @@ class TestSourceCode: AnnotationSpec() {
         val src = SourceCode.Resource(pathString)
 
         src.origin shouldBe "$libraryFilePrefix$pathString"
-        src.readText() shouldBe srcFile.readText()
+        src.text shouldBe srcFile.readText()
     }
 
     @Test
@@ -122,7 +121,7 @@ class TestSourceCode: AnnotationSpec() {
         val src = SourceCode.Resource(pathString)
 
         src.origin shouldBe "$libraryFilePrefix/prog8lib/math.p8"
-        src.readText() shouldBe srcFile.readText()
+        src.text shouldBe srcFile.readText()
         src.isFromResources shouldBe true
     }
 
diff --git a/compiler/test/codegeneration/TestAsmGenSymbols.kt b/compiler/test/codegeneration/TestAsmGenSymbols.kt
index 2853772aa..1cdb35b5f 100644
--- a/compiler/test/codegeneration/TestAsmGenSymbols.kt
+++ b/compiler/test/codegeneration/TestAsmGenSymbols.kt
@@ -4,7 +4,10 @@ import io.kotest.core.spec.style.StringSpec
 import io.kotest.matchers.shouldBe
 import prog8.ast.Module
 import prog8.ast.Program
-import prog8.ast.base.*
+import prog8.ast.base.DataType
+import prog8.ast.base.Position
+import prog8.ast.base.RegisterOrPair
+import prog8.ast.base.VarDeclType
 import prog8.ast.expressions.AddressOf
 import prog8.ast.expressions.IdentifierReference
 import prog8.ast.expressions.NumericLiteralValue
@@ -12,7 +15,10 @@ import prog8.ast.statements.*
 import prog8.codegen.cpu6502.AsmGen
 import prog8.codegen.target.C64Target
 import prog8.codegen.target.c64.C64Zeropage
-import prog8.compilerinterface.*
+import prog8.compilerinterface.CompilationOptions
+import prog8.compilerinterface.LauncherType
+import prog8.compilerinterface.OutputType
+import prog8.compilerinterface.ZeropageType
 import prog8.parser.SourceCode
 import prog8tests.helpers.DummyFunctions
 import prog8tests.helpers.DummyMemsizer
diff --git a/compiler/test/codegeneration/TestVariables.kt b/compiler/test/codegeneration/TestVariables.kt
index b81667e88..3fd2681db 100644
--- a/compiler/test/codegeneration/TestVariables.kt
+++ b/compiler/test/codegeneration/TestVariables.kt
@@ -1,10 +1,7 @@
 package prog8tests.codegeneration
 
 import io.kotest.core.spec.style.FunSpec
-import io.kotest.matchers.shouldBe
-import io.kotest.matchers.string.shouldContain
 import prog8.codegen.target.C64Target
-import prog8tests.helpers.ErrorReporterForTests
 import prog8tests.helpers.assertSuccess
 import prog8tests.helpers.compileText
 
diff --git a/compiler/test/helpers/compileXyz.kt b/compiler/test/helpers/compileXyz.kt
index 8010730ef..b6f451d8e 100644
--- a/compiler/test/helpers/compileXyz.kt
+++ b/compiler/test/helpers/compileXyz.kt
@@ -4,11 +4,11 @@ import io.kotest.assertions.withClue
 import io.kotest.matchers.shouldBe
 import prog8.ast.Program
 import prog8.codegen.cpu6502.AsmGen
+import prog8.codegen.target.C64Target
+import prog8.codegen.target.c64.C64Zeropage
 import prog8.compiler.CompilationResult
 import prog8.compiler.CompilerArguments
 import prog8.compiler.compileProgram
-import prog8.codegen.target.C64Target
-import prog8.codegen.target.c64.C64Zeropage
 import prog8.compilerinterface.*
 import java.nio.file.Path
 import kotlin.io.path.name
diff --git a/compilerAst/src/prog8/ast/AstToplevel.kt b/compilerAst/src/prog8/ast/AstToplevel.kt
index 02d6607b3..697f0b081 100644
--- a/compilerAst/src/prog8/ast/AstToplevel.kt
+++ b/compilerAst/src/prog8/ast/AstToplevel.kt
@@ -1,6 +1,9 @@
 package prog8.ast
 
-import prog8.ast.base.*
+import prog8.ast.base.FatalAstException
+import prog8.ast.base.ParentSentinel
+import prog8.ast.base.Position
+import prog8.ast.base.findParentNode
 import prog8.ast.expressions.Expression
 import prog8.ast.expressions.IdentifierReference
 import prog8.ast.statements.*
diff --git a/compilerAst/src/prog8/ast/Program.kt b/compilerAst/src/prog8/ast/Program.kt
index 133b5e702..830dc4f81 100644
--- a/compilerAst/src/prog8/ast/Program.kt
+++ b/compilerAst/src/prog8/ast/Program.kt
@@ -4,7 +4,6 @@ import prog8.ast.base.DataType
 import prog8.ast.base.FatalAstException
 import prog8.ast.base.Position
 import prog8.ast.base.VarDeclType
-import prog8.ast.expressions.ContainmentCheck
 import prog8.ast.expressions.StringLiteralValue
 import prog8.ast.statements.*
 import prog8.compilerinterface.Encoding
diff --git a/compilerAst/src/prog8/ast/antlr/EscapeChars.kt b/compilerAst/src/prog8/ast/antlr/EscapeChars.kt
index dd800d696..04c5e1a66 100644
--- a/compilerAst/src/prog8/ast/antlr/EscapeChars.kt
+++ b/compilerAst/src/prog8/ast/antlr/EscapeChars.kt
@@ -2,7 +2,6 @@ package prog8.ast.antlr
 
 import prog8.ast.base.Position
 import prog8.ast.base.SyntaxError
-import kotlin.NumberFormatException
 
 fun escape(str: String): String {
     val es = str.map {
diff --git a/compilerAst/src/prog8/parser/Prog8Parser.kt b/compilerAst/src/prog8/parser/Prog8Parser.kt
index b417730d6..3b04c49ca 100644
--- a/compilerAst/src/prog8/parser/Prog8Parser.kt
+++ b/compilerAst/src/prog8/parser/Prog8Parser.kt
@@ -14,7 +14,7 @@ object Prog8Parser {
 
     fun parseModule(src: SourceCode): Module {
         val antlrErrorListener = AntlrErrorListener(src)
-        val lexer = Prog8ANTLRLexer(src.getCharStream())
+        val lexer = Prog8ANTLRLexer(CharStreams.fromString(src.text, src.origin))
         lexer.removeErrorListeners()
         lexer.addErrorListener(antlrErrorListener)
         val tokens = CommonTokenStream(lexer)
diff --git a/compilerAst/src/prog8/parser/SourceCode.kt b/compilerAst/src/prog8/parser/SourceCode.kt
index 0382e27b3..b74d6f7d0 100644
--- a/compilerAst/src/prog8/parser/SourceCode.kt
+++ b/compilerAst/src/prog8/parser/SourceCode.kt
@@ -1,26 +1,16 @@
 package prog8.parser
 
-import org.antlr.v4.runtime.CharStream
-import org.antlr.v4.runtime.CharStreams
 import java.io.File
 import java.io.IOException
-import java.nio.channels.Channels
-import java.nio.charset.CodingErrorAction
 import java.nio.file.Path
-import kotlin.io.path.*
+import kotlin.io.path.Path
+import kotlin.io.path.readText
 
 /**
- * Encapsulates - and ties together - actual source code (=text)
- * and its [origin].
+ * Encapsulates - and ties together - actual source code (=text) and its [origin].
  */
 sealed class SourceCode {
 
-    /**
-     * To be used *only* by the parser (as input to a TokenStream).
-     * DO NOT mess around with!
-     */
-    internal abstract fun getCharStream(): CharStream
-
     /**
      * Whether this [SourceCode] instance was created as a [Resource]
      */
@@ -43,11 +33,10 @@ sealed class SourceCode {
     /**
      * The source code as plain string.
      */
-    abstract fun readText(): String
+    abstract val text: String
 
     /**
-     * Deliberately does NOT return the actual text.
-     * For this - if at all - use [getCharStream].
+     * Printable representation, deliberately does NOT return the actual text.
      */
     final override fun toString() = "${this.javaClass.name}[${this.origin}]"
 
@@ -68,43 +57,37 @@ sealed class SourceCode {
      * Turn a plain String into a [SourceCode] object.
      * [origin] will be something like `$stringSourcePrefix44c56085>`.
      */
-    class Text(val text: String): SourceCode() {
+    class Text(override val text: String): SourceCode() {
         override val isFromResources = false
         override val isFromFilesystem = false
         override val origin = "$stringSourcePrefix${System.identityHashCode(text).toString(16)}>"
-        public override fun getCharStream(): CharStream = CharStreams.fromString(text, origin)
-        override fun readText() = text
     }
 
     /**
      * Get [SourceCode] from the file represented by the specified Path.
-     * This does not actually *access* the file, but it does check
-     * whether it
-     * * exists
-     * * is a regular file (ie: not a directory)
-     * * and is actually readable
+     * This immediately reads the file fully into memory.
      *
      * [origin] will be the given path in absolute and normalized form.
      * @throws NoSuchFileException if the file does not exist
-     * @throws AccessDeniedException if the given path points to a directory or the file is non-readable for some other reason
+     * @throws FileSystemException if the file cannot be read
      */
     class File(path: Path): SourceCode() {
-        private val normalized = path.normalize()
-        init {
-            val file = normalized.toFile()
-            if (!path.exists())
-                throw NoSuchFileException(file)
-            if (path.isDirectory())
-                throw AccessDeniedException(file, reason = "Not a file but a directory")
-            if (!path.isReadable())
-                throw AccessDeniedException(file, reason = "Is not readable")
-        }
-
+        override val text: String
+        override val origin: String
         override val isFromResources = false
         override val isFromFilesystem = true
-        override val origin = relative(normalized).toString()
-        override fun getCharStream(): CharStream = CharStreams.fromPath(normalized)
-        override fun readText() = normalized.readText()
+
+        init {
+            val normalized = path.normalize()
+            origin = relative(normalized).toString()
+            try {
+                text = normalized.readText()
+            } catch (nfx: java.nio.file.NoSuchFileException) {
+                throw NoSuchFileException(normalized.toFile()).also { it.initCause(nfx) }
+            } catch (iox: IOException) {
+                throw FileSystemException(normalized.toFile()).also { it.initCause(iox) }
+            }
+        }
     }
 
     /**
@@ -113,6 +96,11 @@ sealed class SourceCode {
     class Resource(pathString: String): SourceCode() {
         private val normalized = "/" + Path.of(pathString).normalize().toMutableList().joinToString("/")
 
+        override val isFromResources = true
+        override val isFromFilesystem = false
+        override val origin = "$libraryFilePrefix$normalized"
+        override val text: String
+
         init {
             val rscURL = object {}.javaClass.getResource(normalized)
             if (rscURL == null) {
@@ -122,21 +110,8 @@ sealed class SourceCode {
                     reason = "looked in resources rooted at $rscRoot"
                 )
             }
-        }
-
-        override val isFromResources = true
-        override val isFromFilesystem = false
-        override val origin = "$libraryFilePrefix$normalized"
-        public override fun getCharStream(): CharStream {
-            val inpStr = object {}.javaClass.getResourceAsStream(normalized)!!
-            // CharStreams.fromStream() doesn't allow us to set the stream name properly, so we use a lower level api
-            val channel = Channels.newChannel(inpStr)
-            return CharStreams.fromChannel(channel, Charsets.UTF_8, 4096, CodingErrorAction.REPLACE, origin, -1)
-        }
-
-        override fun readText(): String {
             val stream = object {}.javaClass.getResourceAsStream(normalized)
-            return stream!!.bufferedReader().use { r -> r.readText() }
+            text = stream!!.reader().use { it.readText() }
         }
     }
 
@@ -144,10 +119,9 @@ sealed class SourceCode {
      * SourceCode for internally generated nodes (usually Modules)
      */
     class Generated(name: String) : SourceCode() {
-        override fun getCharStream(): CharStream = throw IOException("generated code nodes doesn't have a stream to read")
         override val isFromResources: Boolean = false
         override val isFromFilesystem: Boolean = false
         override val origin: String = name
-        override fun readText() = throw IOException("generated code nodes don't have a text representation")
+        override val text: String = "<generated code node, no text representation>"
     }
 }
diff --git a/compilerInterfaces/src/prog8/compilerinterface/IMachineDefinition.kt b/compilerInterfaces/src/prog8/compilerinterface/IMachineDefinition.kt
index 294a3437e..ab0473daf 100644
--- a/compilerInterfaces/src/prog8/compilerinterface/IMachineDefinition.kt
+++ b/compilerInterfaces/src/prog8/compilerinterface/IMachineDefinition.kt
@@ -1,6 +1,5 @@
 package prog8.compilerinterface
 
-import prog8.ast.base.DataType
 import java.nio.file.Path
 
 
diff --git a/examples/test.p8 b/examples/test.p8
index b71fdee54..37a209a35 100644
--- a/examples/test.p8
+++ b/examples/test.p8
@@ -4,7 +4,7 @@ main {
     sub start() {
         word w1 = -10
         byte bb = 2
-        w1 -= bb-1
+        w1 -= bb-1 - -  -
         txt.print_w(w1)
         txt.nl()
 
diff --git a/httpCompilerService/src/prog8/http/TestHttp.kt b/httpCompilerService/src/prog8/http/TestHttp.kt
index 167c45ebf..3b5b9e434 100644
--- a/httpCompilerService/src/prog8/http/TestHttp.kt
+++ b/httpCompilerService/src/prog8/http/TestHttp.kt
@@ -4,17 +4,17 @@ import org.takes.Request
 import org.takes.Response
 import org.takes.Take
 import org.takes.facets.fork.FkMethods
-import org.takes.http.Exit
-import org.takes.http.FtBasic
 import org.takes.facets.fork.FkRegex
 import org.takes.facets.fork.TkFork
+import org.takes.http.Exit
+import org.takes.http.FtBasic
 import org.takes.rq.form.RqFormBase
 import org.takes.rs.RsJson
 import org.takes.tk.TkSlf4j
 import prog8.compiler.CompilerArguments
-import javax.json.Json
 import prog8.compiler.compileProgram
 import java.nio.file.Path
+import javax.json.Json
 
 
 class Jsonding: RsJson.Source {