From 61d934fd7bba94f79a297567053c81621bbf3c3b Mon Sep 17 00:00:00 2001
From: mrdudz <mrdudz@users.noreply.github.com>
Date: Fri, 25 Sep 2020 16:25:32 +0200
Subject: [PATCH] test related to issue #1265

---
 test/misc/Makefile  |  9 ++++++++
 test/misc/bug1265.c | 51 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 test/misc/bug1265.c

diff --git a/test/misc/Makefile b/test/misc/Makefile
index f8832e77e..f04bcadbd 100644
--- a/test/misc/Makefile
+++ b/test/misc/Makefile
@@ -100,6 +100,15 @@ $(WORKDIR)/bug1263.$1.$2.prg: pptest2.c | $(WORKDIR)
 	$(if $(QUIET),echo misc/bug1263.$1.$2.prg)
 	$(NOT) $(CC65) -t sim$2 -$1 -o $$@ $$< $(NULLERR)
 
+# this one requires --std=c89, it fails with --std=c99
+# it fails currently at runtime
+$(WORKDIR)/bug1265.$1.$2.prg: bug1265.c | $(WORKDIR)
+	$(if $(QUIET),echo misc/bug1265.$1.$2.prg)
+	$(CC65) --standard c89 -t sim$2 -$1 -o $$(@:.prg=.s) $$< $(NULLERR)
+	$(CA65) -t sim$2 -o $$(@:.prg=.o) $$(@:.prg=.s) $(NULLERR)
+	$(LD65) -t sim$2 -o $$@ $$(@:.prg=.o) sim$2.lib $(NULLERR)
+	$(NOT) $(SIM65) $(SIM65FLAGS) $$@ $(NULLOUT) $(NULLERR)
+	
 # should compile, but then hangs in an endless loop
 $(WORKDIR)/endless.$1.$2.prg: endless.c | $(WORKDIR)
 	$(if $(QUIET),echo misc/endless.$1.$2.prg)
diff --git a/test/misc/bug1265.c b/test/misc/bug1265.c
new file mode 100644
index 000000000..469946739
--- /dev/null
+++ b/test/misc/bug1265.c
@@ -0,0 +1,51 @@
+/* bug #1265 - misadjusted stack from unprototyped function call */
+
+#include <stdio.h>
+#include <string.h>
+
+int failures = 0;
+
+char str1[10];
+char str2[10];
+
+int f2 (int x) { return x == 2345 ? 23 : -1; }
+
+int main (void) {
+  int x, n;
+
+  sprintf (str1, "%p\n", &x);
+  puts(str1);
+  x = 1234;
+  n = f1 (x);
+  sprintf (str2, "%p\n", &x);
+  puts(str2);
+  
+  if (strcmp(str1, str2)) {
+      puts("not equal");
+      failures++;
+  }
+  if (n != 42) {
+      puts("f1 returns wrong value");
+      failures++;
+  }
+
+  sprintf (str1, "%p\n", &x);
+  puts(str1);
+  x = 2345;
+  n = f2 (x);
+  sprintf (str2, "%p\n", &x);
+  puts(str2);
+  
+  if (strcmp(str1, str2)) {
+      puts("not equal");
+      failures++;
+  }
+  if (n != 23) {
+      puts("f2 returns wrong value");
+      failures++;
+  }
+
+  return failures;
+}
+
+int f1 (int x) { return x == 1234 ? 42 : -1; }