Issue not correctly aborting compilation on recursive generics.

test/test_suite/generic/recursive_generic2.c3

@@ -0,0 +1,22 @@
+module foo { Type };
+
+import std::collections::list;
+
+struct Foo {
+    Type foo;
+    Allocator allocator;
+    List { Foo } children; // #error: Recursive definition of 'Foo'
+}
+
+module test;
+import std::collections::list;
+import foo;
+
+fn int main(String[] args)
+{
+    Foo { int } test;
+    // assume we add children here but it's irrelevant for the repro
+    Foo {int} [] range = test.children[4:20];
+
+    return 0;
+}