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Subject: [Bug bootstrap/55792] New: Bad memory access with profiledbootstrap and LTO
Date: Sat, 22 Dec 2012 18:05:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55792

             Bug #: 55792
           Summary: Bad memory access with profiledbootstrap and LTO
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


On Linux/x86-64, revision 193848 configured with

--prefix=/usr/local --enable-clocale=gnu --with-system-zlib
--with-demangler-in-ld --enable-languages=c,c++ --enable-bootstrap
--with-build-config=bootstrap-lto --disable-werror

gave

/tmp/ccDjvfDH.s: Assembler messages:
/tmp/ccDjvfDH.s:1094284: Error: invalid character (0xc7) in mnemonic
make[4]: *** [/tmp/cc66Zjao.ltrans24.ltrans.o] Error 1
make[4]: *** Waiting for unfinished jobs....
lto-wrapper: make returned 2 exit status
/usr/local/x86_64-unknown-linux-gnu/bin/ld: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[3]: *** [cc1plus] Error 1
rm gcov.pod cpp.pod gfdl.pod gcc.pod fsf-funding.pod
make[3]: Leaving directory
`/export/project/git/gcc-regression-bootstrap/master/193848/bld/gcc'
make[2]: *** [all-stagefeedback-gcc] Error 2
make[2]: Leaving directory
`/export/project/git/gcc-regression-bootstrap/master/193848/bld'
make[1]: *** [stagefeedback-bubble] Error 2
make[1]: Leaving directory
`/export/project/git/gcc-regression-bootstrap/master/193848/bld'
make: *** [profiledbootstrap] Error 2


The invalid character (0xc7) is in DWARF debug section.