[Bug 29808] New: mingw32-g++ random crash compiling a wxWidgets app since git change 764b85511c72ab9e4b4ab456c98e0e71b4aa4009

http://bugs.winehq.org/show_bug.cgi?id=29808

Bug #: 29808
           Summary: mingw32-g++ random crash compiling a wxWidgets app
                    since git change
                    764b85511c72ab9e4b4ab456c98e0e71b4aa4009
           Product: Wine
           Version: 1.4-rc2
          Platform: x86-64
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: msvcrt
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

I usually build Windows' binary and installer for my projects from my linux
laptop with wine. I've just found that since some change between wine-1.3.32
and wine-1.3.33 it gives random errors when compiling zinjai.exe. The problem
still persist in 1.4rc2 and current git version (tested a few minutes ago).

mingw32-g++ output is the following:

mingw32-g++ -O 2 -I"../MinGW"/wx/include -c mxFlowCanvas.cpp -o
../release.w32/mxFlowCanvas.o
mxFlowCanvas.cpp:823: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See http://gcc.gnu.org/bugs.html for instructions.

there's no other wine message in the output.
The step where the error appears (for wich source file it crash) is not always
the same, it changes if I reboot the system.

I've made a binary search in git tree and I found that the change that
introduces the problem seems to be: 
764b85511c72ab9e4b4ab456c98e0e71b4aa4009: mscvrt: Don't use fputc in flsbuf
implementation.

To reproduce it you can download zinjai for windows (this is the project I'm
trying to compile) from http://zinjai.sourceforge.net, install it (full
installation, with wxWidgets and fuentes checked) and try to compile it again
with a Makefile.wine that you can find in zinjai/src. I use mingw32-4.4.0 and
wxWidgets-2.8.3, both included in zinjai's installer, so you only need to
create a "mingw32-g++" script that calls ming32-g++.exe with wine (or modify
the makefile to set the correct command to call mingw32-g++.exe from zinjai's
mingw installation through wine), an run "make -f Makefile.wine" in a linux
terminal from zinjai/src.

In case it help, I'm running wine on a multilib slackware64 13.0 based system,
with kernel version 3.2.0-rc7.