Depending on available memory, attempting to compile an expression with ridiculously large numbers of nested parentheses (e.g. "return (((...(42)...)));" will also do the trick.

I don't expect a compiler to be able to compile programs that exceed its internal limits, but a better error message would be much appreciated, instead of a hard crash. For comparison, with MSVC the parent's code produces

    fatal error C1026: parser stack overflow, program too complex

and the nested parentheses results in

    fatal error C1013: compiler limit : too many open parentheses