[Bug other/59920] [4.9 Regression] build doesn't terminate (at least after an hour)

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59920

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
For C I believe it's valid to jump back into a scope like that.  I don't 
think it affects reuse of stack space, because the variables in the scope 
that was left have no defined values at longjmp time and so have no 
defined values on the second return from setjmp.