[Bug driver/60968] New: [4.9 Regression] Bootstrap fails on mingw32 with -dumpspecs

[daniel.f.starke at freenet dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60968

            Bug ID: 60968
           Summary: [4.9 Regression] Bootstrap fails on mingw32 with
                    -dumpspecs
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: daniel.f.starke at freenet dot de

Created attachment 32684
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32684&action=edit
gdb output with backtrace

Bootstrapping GCC 4.9 on Windows 7 x64 with mingw32 fails in stage 2 when
calling /new-gcc/bin32/gcc/xgcc.exe -B/new-gcc/bin32/gcc/ -dumpspecs.
GCC was configured as:
../src/gcc-4.9.0/configure --enable-languages=c,c++ --disable-sjlj-exceptions
--disable-nls --disable-shared --enable-static --enable-fully-dynamic-string
--enable-libgomp --enable-lto --with-dwarf2 --disable-win32-registry
--enable-version-specific-runtime-libs --enable-bootstrap --build=mingw32
--enable-abi=32 --enable-checking=all --prefix=/mingw --with-mpfr=/mingw
--with-gmp=/mingw --with-mpc=/mingw

See attachment for GDB output.
GCC 4.8.2 did not show this bug.