pkg/csource: remove include guards from reproducers

Drop all lines matching `#define [A-Z0-9_]*_H` from the reproducers

Author: ramosian-glider

pkg/csource/csource.go

@@ -685,6 +685,9 @@ func (ctx *context) postProcess(result []byte) []byte {
 	result = regexp.MustCompile(`\t*exitf\((.*\n)*?.*\);\n`).ReplaceAll(result, []byte("\texit(1);\n"))
 	result = regexp.MustCompile(`\t*fail(msg)?\((.*\n)*?.*\);\n`).ReplaceAll(result, []byte("\texit(1);\n"))
 
+	// Remove executor include guards.
+	result = regexp.MustCompile(`#define\s+[A-Z0-9_]*_H\s*\n`).ReplaceAll(result, nil)
+
 	result = ctx.hoistIncludes(result)
 	result = ctx.removeEmptyLines(result)
 	return result

pkg/csource/csource_test.go

@@ -140,6 +140,11 @@ func testOne(t *testing.T, p *prog.Prog, opts Options) {
 		t.Logf("opts: %+v\nprogram:\n%s", opts, p.Serialize())
 		t.Fatalf("%v", err)
 	}
+	// Executor headers are embedded into the C source. Make sure there are no leftover include guards.
+	if matches := regexp.MustCompile(`(?m)^#define\s+\S+_H\s*\n`).FindAllString(string(src), -1); len(matches) > 0 {
+		t.Fatalf("source contains leftover include guards: %v\nopts: %+v\nprogram:\n%s",
+			matches, opts, p.Serialize())
+	}
 	bin, err := Build(p.Target, src)
 	if err != nil {
 		if atomic.AddUint32(&failedTests, 1) > maxFailures {