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From: "krebbel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/51144] New: r181279
Date: Tue, 15 Nov 2011 19:30:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51144

             Bug #: 51144
           Summary: r181279
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: krebbel@gcc.gnu.org


With revision 181279 GCC stopped bootstrapping on s390 (31 bit). 

genmddeps complains about a missing [ altough it is there. The s390.md file
didn't change in that revision.

build/genmddeps /build/regtest/gcc-bisect/gcc/config/s390/s390.md > tmp-mddeps
/build/regtest/gcc-bisect/gcc/config/s390/s390.md:60: expected character `[',
found ` '
/build/regtest/gcc-bisect/gcc/config/s390/s390.md:60: following context is `['

s390.md:

60: (define_c_enum "unspec" [

Perhaps a miscompilation of genmddeps?!