https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70199
Bug ID: 70199 Summary: Crash at -O2 when using labels. Product: gcc Version: 5.3.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: sce196 at icloud dot com Target Milestone: --- Created attachment 37944 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37944&action=edit Preprocessed reproducer source code. A crash occurs when compiling the attached (already preprocessed) code at -O2 or higher (no crash at -O1/-O0): $ gcc -O2 b.i -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc/aarch64-linux-gnu/5/lto-wrapper Target: aarch64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Debian 5.3.1-8' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-arm64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-arm64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-arm64 --with-arch-directory=aarch64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-multiarch --enable-fix-cortex-a53-843419 --enable-checking=release --build=aarch64-linux-gnu --host=aarch64-linux-gnu --target=aarch64-linux-gnu Thread model: posix gcc version 5.3.1 20160205 (Debian 5.3.1-8) COLLECT_GCC_OPTIONS='-O2' '-v' '-mlittle-endian' '-mabi=lp64' /usr/lib/gcc/aarch64-linux-gnu/5/cc1 -fpreprocessed b.i -quiet -dumpbase b.i -mlittle-endian -mabi=lp64 -auxbase b -O2 -version -o /tmp/ccwrrZPj.s GNU C11 (Debian 5.3.1-8) version 5.3.1 20160205 (aarch64-linux-gnu) compiled by GNU C version 5.3.1 20160205, GMP version 6.1.0, MPFR version 3.1.3-p5, MPC version 1.0.3 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C11 (Debian 5.3.1-8) version 5.3.1 20160205 (aarch64-linux-gnu) compiled by GNU C version 5.3.1 20160205, GMP version 6.1.0, MPFR version 3.1.3-p5, MPC version 1.0.3 GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: d706fe477e183894c53893e591b1fa46 *** Error in `/usr/lib/gcc/aarch64-linux-gnu/5/cc1': double free or corruption (out): 0x00000000278bf770 *** b.c: In function ‘benchmark.constprop’: b.c:23:1: internal compiler error: Aborted } ^ 0x950047 crash_signal ../../src/gcc/toplev.c:383 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.