diff --git a/codeOptimizers/src/prog8/optimizer/UnusedCodeRemover.kt b/codeOptimizers/src/prog8/optimizer/UnusedCodeRemover.kt
index d51c24c0e..e5ecc9770 100644
--- a/codeOptimizers/src/prog8/optimizer/UnusedCodeRemover.kt
+++ b/codeOptimizers/src/prog8/optimizer/UnusedCodeRemover.kt
@@ -106,10 +106,10 @@ class UnusedCodeRemover(private val program: Program,
         if(decl.type==VarDeclType.VAR) {
             val block = decl.definingBlock
             val forceOutput = "force_output" in block.options()
-            if (!forceOutput && decl.origin==VarDeclOrigin.USERCODE && !decl.sharedWithAsm && !block.isInLibrary) {         // TODO remove check on block.isInLibrary, but this now breaks some programs
+            if (!forceOutput && decl.origin==VarDeclOrigin.USERCODE && !decl.sharedWithAsm) {
                 val usages = callgraph.usages(decl)
                 if (usages.isEmpty()) {
-                    if(!decl.definingModule.isLibrary)
+                    // if(!decl.definingModule.isLibrary)
                         errors.warn("removing unused variable '${decl.name}'", decl.position)
                     return listOf(IAstModification.Remove(decl, parent as IStatementContainer))
                 }
diff --git a/compiler/res/prog8lib/conv.p8 b/compiler/res/prog8lib/conv.p8
index 86a2752b6..c6887b8b8 100644
--- a/compiler/res/prog8lib/conv.p8
+++ b/compiler/res/prog8lib/conv.p8
@@ -7,7 +7,7 @@ conv {
 
 ; ----- number conversions to decimal strings ----
 
-    str  string_out = "????????????????"       ; result buffer for the string conversion routines
+    str  @shared string_out = "????????????????"       ; result buffer for the string conversion routines
 
 asmsub  str_ub0  (ubyte value @ A) clobbers(A,Y)  {
 	; ---- convert the ubyte in A in decimal string form, with left padding 0s (3 positions total)
diff --git a/compiler/res/prog8lib/cx16/gfx2.p8 b/compiler/res/prog8lib/cx16/gfx2.p8
index 2ff1162ba..2fc4174f3 100644
--- a/compiler/res/prog8lib/cx16/gfx2.p8
+++ b/compiler/res/prog8lib/cx16/gfx2.p8
@@ -369,7 +369,7 @@ _done
                 set_both_strides(13)    ; 160 increment = 1 line in 640 px 4c mode
                 color &= 3
                 color <<= gfx2.plot.shift4c[lsb(x) & 3]
-                ubyte mask = gfx2.plot.mask4c[lsb(x) & 3]
+                ubyte @shared mask = gfx2.plot.mask4c[lsb(x) & 3]
                 repeat height {
                     %asm {{
                         lda  cx16.VERA_DATA0
@@ -545,9 +545,9 @@ _done
     }
 
     sub plot(uword @zp x, uword y, ubyte color) {
-        ubyte[8] bits = [128, 64, 32, 16, 8, 4, 2, 1]
-        ubyte[4] mask4c = [%00111111, %11001111, %11110011, %11111100]
-        ubyte[4] shift4c = [6,4,2,0]
+        ubyte[8] @shared bits = [128, 64, 32, 16, 8, 4, 2, 1]
+        ubyte[4] @shared mask4c = [%00111111, %11001111, %11110011, %11111100]
+        ubyte[4] @shared shift4c = [6,4,2,0]
 
         when active_mode {
             1 -> {
diff --git a/compiler/res/prog8lib/diskio.p8 b/compiler/res/prog8lib/diskio.p8
index 6c557d6c7..aecee17db 100644
--- a/compiler/res/prog8lib/diskio.p8
+++ b/compiler/res/prog8lib/diskio.p8
@@ -407,7 +407,7 @@ io_error:
     sub save(ubyte drivenumber, uword filenameptr, uword address, uword size) -> ubyte {
         c64.SETNAM(string.length(filenameptr), filenameptr)
         c64.SETLFS(1, drivenumber, 0)
-        uword end_address = address + size
+        uword @shared end_address = address + size
         first_byte = 0      ; result var reuse
 
         %asm {{
diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index 436e98557..74ea4ca59 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -3,7 +3,6 @@ TODO
 
 For next release
 ^^^^^^^^^^^^^^^^
-- (newvaralloc) UnusedCodeRemover after(decl: VarDecl): fix that vars defined in a library can also safely be removed if unused. Currently this breaks programs such as textelite (due to diskio.save().end_address ?)
 - make it so that subroutine parameters as variables can again be allocated in ZP, if there's still space