gcc 3.4.4 bug

[John M. Gravley]

I have found an apparent bug in gcc 3.4.4 under Cygwin. The attached test case (and the code it's derived from) works as expected with Cygwin gcc 3.3.3 with the exact same Cygwin install except the compiler packages. It also works fine with various versions of gcc on other platforms, including 3.4.2 (FC3) and 4.0 (FC4).

This is probably isn't an absolute minimal test case, but it's not far off.





Please let me know if I have misssed some needed information.

John

gcc version (results of gcc -v)
Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs
Configured with: /gcc/gcc-3.4.4/gcc-3.4.4-1/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,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 : (reconfigured)
Thread model: posix
gcc version 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)

system (results of uname -a)
CYGWIN_NT-5.0 trivia 1.5.17(0.129/4/2) 2005-05-25 19:38 i686 unknown
unknown Cygwin

command line (see Makefile and baselib.mak)

There are no compiler warnings or errors.

The test case is all of the files in the attached gcc-3.4.4-bug-test-case.tar.gz. I sent the sample instead of the preprocessed files because the bug only presents itself when the base class code is in a library. If you include it in the main file or just link it in as a .o, the code works fine. I have included cygcheck.out.gz as per Cygwin bug reporting instructions in case it's needed/wanted. I gzipped it to avoid the verbosity in the message for those who don't care. I submitted this to the cygwin mailing list and was asked to report it as a gcc bug. I looked at entering it into the bugzilla database, but I didn't see a way to easily give you this type of test case using that mechanism.

cygcheck.out.gz
Description: application/gzip

gcc-3.4.4-bug-test-case.tar.gz
Description: application/gzip