[Bug c++/61670] ICE on invalid in tree_nop_conversion

[ville.voutilainen at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61670

--- Comment #3 from Ville Voutilainen <ville.voutilainen at gmail dot com> ---
This doesn't crash on my local compiler, which is 20141212.