Resolving &X.b when X is a const incorrectly checked for runtime constness #2842

Creating a generic instance fails if it is created after interface checking #2840

test/test_suite/builtins/catch_zero_unaligned.c3

@@ -0,0 +1,4 @@
+fn void unaligned_load_store(void* dst, void* src) @nostrip
+{
+    $$unaligned_store(dst, $$unaligned_load((char*)src, 2, false), 0, false); // #error:  Alignment must not be zero
+}