"poison" the current function early when a declaration can't be correctly resolved.

test/src/test_suite_runner.c3

@@ -442,7 +442,7 @@ fn void test_file(Path file_path)
 	// Start process
 	SubProcess compilation = process::create(cmdline.array_view(), { .search_user_path, .no_window, .inherit_environment })!!;
 	defer compilation.destroy();
-    CInt result = compilation.join()!!;
+    CInt result = compilation.join() ?? 1;
 	DString out;
 	io::copy_to(&&compilation.stderr(), &out)!!;
 	if (result != 0 && result != 1)

test/test_suite/cast/cast_struct.c3

@@ -25,13 +25,15 @@ struct BazTwo
 fn void test()
 {
     Foo x;
-    Bar y = (Bar)(x); // #error: 'Foo' to 'Bar'
+    { Bar y = (Bar)(x); } // #error: 'Foo' to 'Bar'
 
     Baz z;
-    int[2] w = (int[2])(z); // #error: 'Baz' to 'int[2]'
-    z = (Baz)(w);
-    BazTwo v = (BazTwo)(z); // #error: 'Baz' to 'BazTwo'
-    v = (BazTwo)(w);
-    z = (Baz)(v);
-    w = (int[2])(v);
+    { int[2] w = (int[2])(z); } // #error: 'Baz' to 'int[2]'
+    int[2] w;
+    z = (Baz)(w); // #error: to 'Baz'
+    { BazTwo v = (BazTwo)(z); } // #error: 'Baz' to 'BazTwo'
+    BazTwo v;
+    v = (BazTwo)(w); // #error: to 'BazTwo'
+    z = (Baz)(v);    // #error: possible to cast 'BazTwo' to 'Baz'
+    w = (int[2])(v); // #error: possible to cast 'BazTwo' to 'int[2]'
 }

test/test_suite/compile_time/concat_slice_array.c3

@@ -10,6 +10,18 @@ $foreach  $c : $chars:
         int $offset = ($c - $from) / BITS;
         int $rem = ($c - $from) % BITS;
         uint128 $value = $bitmap[$offset]; // #error: is out of range
+$endforeach
+}
+
+fn int main2()
+{
+ String $chars = "Abcd";
+ char $from = 2;
+ char[10] $bitmap = {};
+$foreach  $c : $chars:
+        int $offset = ($c - $from) / BITS;
+        int $rem = ($c - $from) % BITS;
+        uint128 $value = 1;
         $value |= 1ULL << $rem;
         $bitmap = $bitmap[:$offset] +++ $value +++ $bitmap[$offset+1..]; // #error: End index out of bounds
 $endforeach

test/test_suite/errors/rethrow_macro.c3

@@ -1,14 +1,14 @@
 module testing;
 import std::io;
 
-macro char[] read(src, Allocator allocator, n)
+macro void read(src, Allocator allocator, n)
 {
     char* data = allocator::malloc_try(allocator, n)!; // #error: Rethrow is only allowed in macros
-    io::read_all(src, data[:n])!;
+    (void)io::read_all(src, data[:n]);
 }
 
 fn void main()
 {
     ByteReader br;
-    read(&br, allocator::temp(), 10);
+    read(&br, allocator::temp(), 10)!!;
 }

test/test_suite/visibility/recurse_private_import.c3

@@ -27,7 +27,7 @@ import abc @norecurse @public;
 
 fn int test()
 {
-	Abc x; // #error: is '@private'
+	{ Abc x; } // #error: is '@private'
 	abc::baz::test(); // #error: is '@private'
 	return 0;
 }