Re: [Mingw-cross-env-list] stack smashing on i686 with -O3 since da82d07dbe

[Moritz Bunkus]

Hey,

thanks for the hint, that's a nice one. It happens when more than 16
instances of the tranlation_c class are emplace_back().

I'm attaching a smallish test case to be compiled with

i686-w64-mingw32.static-g++ -std=c++11 -O3 -fstack-protector-strong -o 
crashtest.exe crashtest.cpp

As soon as you uncomment any of the commented-out lines the crash
happens.

The crash happens with i686 @ da82d07dbeca23087aa4351914cf4b890c1d3972
and at today's i686 with -O3. It does NOT crash with i686 and -O2. It
does NOT crash with x86_64, no matter which -O and which revision is
used.

I've tried to make it smaller, e.g. reduce the translation_c class to
contain only a single std::string – no crash no matter how many entries
are emplaced_back(). Another test was to use a std::vector<int> instead
of my own crash – again no crash no matter how many entries are
emplaced.

Kind regards,
mosu

crashtest.cpp
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