[Bug middle-end/51546] New: [4.7 Regression] error: fallthru to exit from bb 2 compiling libstdc++-v3/src/strstream.cc

["danglin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51546

             Bug #: 51546
           Summary: [4.7 Regression] error: fallthru to exit from bb 2
                    compiling libstdc++-v3/src/strstream.cc
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: danglin@gcc.gnu.org
              Host: hppa*-*-*
            Target: hppa*-*-*
             Build: hppa*-*-*


libtool: compile:  /home/dave/gnu/gcc/objdir/./gcc/xgcc -shared-libgcc
-B/home/d
ave/gnu/gcc/objdir/./gcc -nostdinc++
-L/home/dave/gnu/gcc/objdir/hppa-linux-gnu/
libstdc++-v3/src
-L/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/src/.li
bs -B/home/dave/opt/gnu/gcc/gcc-4.7.0/hppa-linux-gnu/bin/
-B/home/dave/opt/gnu/g
cc/gcc-4.7.0/hppa-linux-gnu/lib/ -isystem
/home/dave/opt/gnu/gcc/gcc-4.7.0/hppa-
linux-gnu/include -isystem
/home/dave/opt/gnu/gcc/gcc-4.7.0/hppa-linux-gnu/sys-i
nclude
-I/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/hppa-linu
x-gnu -I/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include
-I/home/da
ve/gnu/gcc/gcc/libstdc++-v3/libsupc++ -fno-implicit-templates -Wall -Wextra
-Wwr
ite-strings -Wcast-qual -fdiagnostics-show-location=once -ffunction-sections
-fd
ata-sections -frandom-seed=istream.lo -g -O2 -D_GNU_SOURCE -c
../../../../gcc/li
bstdc++-v3/src/istream.cc  -fPIC -DPIC -o .libs/istream.o
In file included from ../../../../gcc/libstdc++-v3/src/strstream.cc:45:0:
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/backward/strstream:
In member function âvoid std::istrstream::_ZTv0_n12_NSt10istrstreamD0Ev()â:
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/backward/strstream:134:13:
error: fallthru to exit from bb 2
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/backward/strstream:134:13:
error: fallthru edge after a control statement in bb 2
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/backward/strstream:134:13:
error: wrong outgoing edge flags at end of bb 2
/home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/include/backward/strstream:134:13:
internal compiler error: verify_flow_info failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[5]: *** [strstream.lo] Error 1

First seen in revision 182281.  182126 was ok.