Fix problems on goldendoodle

Makefile

@@ -40,7 +40,7 @@ tests/%-expected-stdout.txt: tests/%.c
 	grep '// stdout: ' $^ | sed 's/\/\/ stdout: //' > $@
 
 tests/%-expected-stderr.txt: tests/%.c
-	grep '// stderr: ' $^ | sed 's/\/\/ stderr: //' > $@
+	grep '// stderr: ' $^ | sed 's/\/\/ stderr: //' | head --lines=1 > $@
 
 tests/%-actual-code.txt: bin/%
 	$^ > $(@:code.txt=stdout.txt) 2> $(@:code.txt=stderr.txt); \
@@ -52,6 +52,8 @@ tests/%-actual-code.txt: bin/%
 		echo $$code > $@
 
 %-result: tests/%-actual-code.txt tests/%-expected-code.txt tests/%-expected-stdout.txt tests/%-expected-stderr.txt
+	head --lines=1 $(<:code.txt=stderr.txt) > tmp; \
+	mv tmp $(<:code.txt=stderr.txt); \
 	diff -u $(word 3,$^) $(<:code.txt=stdout.txt) && \
 		diff -u $(word 4,$^) $(<:code.txt=stderr.txt) && \
 		diff -u $(word 2,$^) $< && \

tests/hello_use_after_free2.c

@@ -16,7 +16,7 @@ int main() {
 
 // stdout: HELO
 
-// stderr: Invalid heap access: address 0x100001fd8 is not in an allocation or was already freed
+// stderr: Invalid heap access: address 0x100001fc0 is not in an allocation or was already freed
 // stderr: at /lib/x86_64-linux-gnu/libc.so.6(+0x18b675)
 // stderr: __strlen_avx2
 // stderr: strlen-avx2.S:65