http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51537
Bug #: 51537 Summary: ICE in verify_flow_info while building libstdc++-v3 Classification: Unclassified Product: gcc Version: 4.7.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassig...@gcc.gnu.org ReportedBy: rmansfi...@qnx.com Host: x86_64-linux-gnu Target: arm-unknown-linux-gnueabi Build: x86_64-linux-gnu ICE building libstdc++-v3 on trunk. It started in the last day or so. Might be a duplicate. I'll try to narrow down the rev make[4]: Entering directory `/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/src' /bin/bash ../libtool --tag CXX --mode=compile /home/ryan/gnu/gcc/trunk/arm-eabi/./gcc/xgcc -shared-libgcc -B/home/ryan/gnu/gcc/trunk/arm-eabi/./gcc -nostdinc++ -L/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/src -L/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/src/.libs -B/home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/bin/ -B/home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/lib/ -isystem /home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/include -isystem /home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-include -I/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include/arm-unknown-linux-gnueabi -I/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include -I/home/ryan/gnu/gcc/trunk/libstdc++-v3/libsupc++ -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -fdiagnostics-show-location=once -ffunction-sections -fdata-sections -frandom-seed=strstream.lo -g -Os -I/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include/backward -Wno-deprecated -c ../../../../libstdc++-v3/src/strstream.cc libtool: compile: /home/ryan/gnu/gcc/trunk/arm-eabi/./gcc/xgcc -shared-libgcc -B/home/ryan/gnu/gcc/trunk/arm-eabi/./gcc -nostdinc++ -L/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/src -L/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/src/.libs -B/home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/bin/ -B/home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/lib/ -isystem /home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/include -isystem /home/ryan/x-tools/arm-unknown-linux-gnueabi/arm-unknown-linux-gnueabi/sys-include -I/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include/arm-unknown-linux-gnueabi -I/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include -I/home/ryan/gnu/gcc/trunk/libstdc++-v3/libsupc++ -fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -fdiagnostics-show-location=once -ffunction-sections -fdata-sections -frandom-seed=strstream.lo -g -Os -I/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include/backward -Wno-deprecated -c ../../../../libstdc++-v3/src/strstream.cc -o strstream.o In file included from ../../../../libstdc++-v3/src/strstream.cc:45:0: /home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include/backward/strstream: In member function 'void* std::istrstream::_ZTv0_n12_NSt10istrstreamD0Ev()': /home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include/backward/strstream:134:13: error: fallthru to exit from bb 2 /home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include/backward/strstream:134:13: error: fallthru edge after a control statement in bb 2 /home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/include/backward/strstream:134:13: error: wrong outgoing edge flags at end of bb 2 /home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/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[4]: *** [strstream.lo] Error 1 make[4]: Leaving directory `/home/ryan/gnu/gcc/trunk/arm-eabi/arm-unknown-linux-gnueabi/libstdc++-v3/src'