[Bug bootstrap/66638] [6 Regression] profiledbootstrap failure on x86-64 with LTO

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66638

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
r225008 gave me:

../../src-trunk/gcc/../libcpp/include/line-map.h: In function
âlinemap_check_ordinaryâ:
../../src-trunk/gcc/../libcpp/include/line-map.h:325:10: internal compiler
error: in check_die, at dwarf2out.c:5746
0x7f3589 check_die
        ../../src-trunk/gcc/dwarf2out.c:5742
0x834ff0 dwarf2out_decl
        ../../src-trunk/gcc/dwarf2out.c:21918
0x8353cb dwarf2out_function_decl
        ../../src-trunk/gcc/dwarf2out.c:21927
0x8e819e rest_of_handle_final
        ../../src-trunk/gcc/final.c:4494
0x8e819e execute
        ../../src-trunk/gcc/final.c:4536
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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make[7]: *** [/tmp/ccRu9AVe.ltrans0.ltrans.o] Error 1
lto-wrapper: fatal error: make returned 2 exit status
compilation terminated.
/usr/local/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[6]: *** [f951] Error 1