[Bug lto/62026] [4.9/4.10 Regression] Crash in lto_get_decl_name_mapping

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62026

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-08-09
                 CC|                            |trippels at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Also happens during Firefox libxul link:

markus@x4 library % cat minimal
/var/tmp/moz-build-dir/toolkit/library/../../dom/ipc/TabChild.o
/var/tmp/moz-build-dir/toolkit/library/../../widget/xpwidgets/nsContentProcessWidgetFactory.o
/var/tmp/moz-build-dir/toolkit/library/../../widget/xpwidgets/nsIdleService.o
/var/tmp/moz-build-dir/toolkit/library/../../widget/xpwidgets/nsScreenManagerProxy.o
/var/tmp/moz-build-dir/toolkit/library/../../widget/xpwidgets/nsTransferable.o
/var/tmp/moz-build-dir/toolkit/library/../../widget/gtk/nsWidgetFactory.o
/var/tmp/moz-build-dir/toolkit/library/../../widget/gtk/nsWindow.o

markus@x4 library % c++ -w -flto -pipe -O3 -shared -Wfatal-errors @minimal
lto1: internal compiler error: Segmentation fault
0x91a64f crash_signal
        ../../gcc/gcc/toplev.c:337
0x81df58 lto_get_decl_name_mapping(lto_file_decl_data*, char const*)
        ../../gcc/gcc/lto-section-in.c:340
0x8174a6 copy_function_or_variable
        ../../gcc/gcc/lto-streamer-out.c:2162
0x8180f1 lto_output()
        ../../gcc/gcc/lto-streamer-out.c:2254
0x862601 write_lto
        ../../gcc/gcc/passes.c:2226
0x865b11 ipa_write_optimization_summaries(lto_symtab_encoder_d*)
        ../../gcc/gcc/passes.c:2423
0x5424ba do_stream_out
        ../../gcc/gcc/lto/lto.c:2457
0x544d39 stream_out
        ../../gcc/gcc/lto/lto.c:2499
0x544d39 lto_wpa_write_files
        ../../gcc/gcc/lto/lto.c:2636
0x54d24a do_whole_program_analysis
        ../../gcc/gcc/lto/lto.c:3304
0x54d24a lto_main()
        ../../gcc/gcc/lto/lto.c:3424
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: /var/tmp/gcc_test/usr/local/bin/c++ returned 1 exit
status
compilation terminated.
/usr/bin/ld: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status

The attached testcase doesn't reproduce the issue for me.