[Bug lto/81612] New: lto1: internal compiler error: Segmentation fault

["vctrex at mailfence dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81612

            Bug ID: 81612
           Summary: lto1: internal compiler error: Segmentation fault
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vctrex at mailfence dot com
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

With avr-gcc-6.3.0_1 compiling anything with Serial.begin() results an error.

Arduino:1.8.3 (Linux)

lto1: internal compiler error: Segmentation fault
0x8b64df crash_signal
        ../../gcc/toplev.c:333
0x7f4f10c34a8f ???
       
/builddir/glibc-2.25/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x7428b6 maybe_record_node
        ../../gcc/ipa-devirt.c:2468
0x747245 possible_polymorphic_call_targets(tree_node*, long,
ipa_polymorphic_call_context, bool*, void**, bool)
        ../../gcc/ipa-devirt.c:3186
0x747d0e possible_polymorphic_call_targets(cgraph_edge*, bool*, void**, bool)
        ../../gcc/ipa-utils.h:115
0x747d0e ipa_devirt
        ../../gcc/ipa-devirt.c:3597
0x747d0e execute
        ../../gcc/ipa-devirt.c:3913
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper: fatal error: /usr/bin/avr-gcc returned 1 exit status
compilation terminated.
/usr/bin/avr-ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
exit status 1