[Bug bootstrap/51969] New: [4.7 regression] gcc 4.7 unable to build gcc 4.6

[markus at trippelsdorf dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51969

             Bug #: 51969
           Summary: [4.7 regression] gcc 4.7 unable to build gcc 4.6
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: markus@trippelsdorf.de


gcc-4.7 doesn't build gcc-4.6 anymore:

gtype-desc.c:8893:18: error: subscripted value is neither array nor pointer nor
vector
gtype-desc.c:9012:36: error: subscripted value is neither array nor pointer nor
vector
gtype-desc.c:9096:31: error: subscripted value is neither array nor pointer nor
vector
gtype-desc.c:9117:31: error: subscripted value is neither array nor pointer nor
vector
gtype-desc.c:9124:31: error: subscripted value is neither array nor pointer nor
vector
gtype-desc.c:9131:31: error: subscripted value is neither array nor pointer nor
vector
make[3]: *** [gtype-desc.o] Error 1
make[3]: *** Waiting for unfinished jobs....

or with --enable-build-with-cxx:

gtype-desc.c:8893:20: error: no match for ‘operator[]’ in ‘x_rtl[0]’
gtype-desc.c:9012:38: error: no match for ‘operator[]’ in
‘default_target_libfuncs[0]’
gtype-desc.c:9096:33: error: no match for ‘operator[]’ in
‘default_target_rtl[0]’
gtype-desc.c:9117:33: error: no match for ‘operator[]’ in
‘default_target_rtl[0]’
gtype-desc.c:9124:33: error: no match for ‘operator[]’ in
‘default_target_rtl[0]’
gtype-desc.c:9131:33: error: no match for ‘operator[]’ in
‘default_target_rtl[0]’
make[3]: *** [gtype-desc.o] Error 1
make[3]: *** Waiting for unfinished jobs....

(gcc-4.6.3 builds gcc-4.6 without problems.)