[Bug sanitizer/61530] [4.10 Regression] segfault with asan

[y.gribov at samsung dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61530

--- Comment #2 from Yury Gribov <y.gribov at samsung dot com> ---
Created attachment 32951
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32951&action=edit
Proposed patch

This seems to fix the ICE (I haven't yet done complete bootstrap, just Asan
tests).