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Re: gcc version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125) Internal compiler error

Hello again,

Several days ago I sent a bug report about an internal compiler error to the cygwin and gcc-bugs lists. I've not heard back anything from either of the lists, and was wondering if there was something more that I needed to provide. I realize there's no support contract here, and I'm not expecting that a solution be handed to me. I'm happy to investigate further if someone will point me in the right direction. But so far I think I've done exactly what was asked of me to report the report the problem...

Should I try to create a ticket in gcc bugzilla? Has anyone been able to reproduce the problem? Will cygwin or gcc track this problem? Am I done, and I just need to wait patiently for someone to get to it? I'm just wondering what to do now...

Cory Cohen wrote:

While compiling some code with g++ on cygwin, I encountered an internal compiler error, which I was eventually able to narrow down to this:

$ g++ -c /usr/lib/gcc/i686-pc-mingw32/3.4.4/include/c++/bits/locale_classes.h
/usr/lib/gcc/i686-pc-mingw32/3.4.4/include/c++/bits/locale_classes.h:43:13: warning: #pragma system_header ignored outside include file
/usr/lib/gcc/i686-pc-mingw32/3.4.4/include/c++/bits/locale_classes.h:597: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:> for instructions.

The error also occurs for a number of upstream includes like <iterator>. I was able to track it as far as local_classes.h and then it became rather difficult, since changing nearly anything caused the error to disappear (with a successful compile).

The error is occasionally intermittent, in that I can sometimes issue the same command over and over and get different results (successful or an internal error) on each invocation. The command provided above appears to fail 100% of the time on my system, but there's no assurance it won't be intermittent in another environment, so give it several attempts.

I've got what I suspect may be a rather uncommon environment... 64-bit Vista running cygwin, but things generally seem to work just fine, and I've not done anything unusual to customize it.

I've included the g++ -v output below, and attached two versions of the cygcheck command output for the cygwin folks. The second one is because "cygcheck -r" fails with some kind of an infinite recursion problem (which you can see starting near the end of the output).

$ g++ -v
Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs
Configured with: /usr/build/package/orig/test.respin/gcc-3.4.4-3/configure --verbose --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-languages=c,ada,c++,d,f77,pascal,java,objc --enable-nls --without-included-gettext --enable-version-specific-runtime-libs --without-x --enable-libgcj --disable-java-awt --with-system-zlib --enable-interpreter --disable-libgcj-debug --enable-threads=posix --enable-java-gc=boehm --disable-win32-registry --enable-sjlj-exceptions --enable-hash-synchronization --enable-libstdcxx-debug
Thread model: posix
gcc version 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)

Finally, I've included the local_classes.ii output from --save-temps in case my "standard" includes aren't really standard for some strange reason.

If there's anything else I can do to help, please let me know.

Cory Cohen

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