Fixes to lib7, added parallel test structure.

test/test_suite7/lambda/lambda_checks.c3

@@ -0,0 +1,14 @@
+module test;
+def Func = fn void (bool);
+
+fn bool foo (String) => true;
+fn void bar(Func func) => func(false);
+
+fn void main()
+{
+	Func funcX = &foo; // #error: Implicitly casting
+	bar(&foo); // #error: Implicitly casting
+
+	Func func = fn bool (String) { return true; }; // #error: which doesn't match
+	bar(fn bool (String) { return true; }); // #error: which doesn't match
+}