https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92301
Bug ID: 92301 Summary: bootstrap internal compiler error: Aborted free(): invalid next size (fast) Product: gcc Version: 10.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: jan at jki dot io Target Milestone: --- gcc bootstrapped with -O3 seems to be broken at the moment. flags are: "-march=skylake -g1 -O2" latest trunk If I compile with -O2 it works COLLECT_GCC_OPTIONS='-B' '/var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/build/./gcc/' '-B' '/usr/x86_64-pc-linux-gnu/bin/' '-B' '/usr/x86_64-pc-linux-gnu/lib/' '-isystem' '/usr/ /var/tmp/portage/sys-devel/gcc-10.0.0_pre9999/work/build/./gcc/cc1 -fpreprocessed conftest.i -quiet -dumpbase conftest.c -march=skylake -auxbase conftest -g -g1 -O2 -O3 -version -fn GNU C17 (Gentoo 10.0.0_pre9999) version 10.0.0-pre9999 20191031 (experimental) (x86_64-pc-linux-gnu) compiled by GNU C version 10.0.0-pre9999 20191031 (experimental), GMP version 6.1.2, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.21-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 GNU C17 (Gentoo 10.0.0_pre9999) version 10.0.0-pre9999 20191031 (experimental) (x86_64-pc-linux-gnu) compiled by GNU C version 10.0.0-pre9999 20191031 (experimental), GMP version 6.1.2, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.21-GMP GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072 Compiler executable checksum: fa416f315144141f16c1f6d6e3d5dca9 free(): invalid next size (fast) during RTL pass: ree conftest.c: In function 'main': conftest.c:16:1: internal compiler error: Aborted 16 | } | ^ 0x7fa14496770f ??? /var/tmp/portage/sys-libs/glibc-2.30/work/glibc-2.30/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0 0x7fa14496766a __GI_raise ../sysdeps/unix/sysv/linux/raise.c:51 0x7fa14491855b __GI_abort /var/tmp/portage/sys-libs/glibc-2.30/work/glibc-2.30/stdlib/abort.c:79 0x7fa1449a682c __libc_message ../sysdeps/posix/libc_fatal.c:181 0x7fa1449ae519 malloc_printerr /var/tmp/portage/sys-libs/glibc-2.30/work/glibc-2.30/malloc/malloc.c:5341 0x7fa144939c20 _int_free /var/tmp/portage/sys-libs/glibc-2.30/work/glibc-2.30/malloc/malloc.c:4252 0x7fa144939c20 __GI___libc_free /var/tmp/portage/sys-libs/glibc-2.30/work/glibc-2.30/malloc/malloc.c:3127 0x7fa1449495eb __libc_start_main ../csu/libc-start.c:308 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report.