[Bug go/88171] New: [9 Regression] libgo bootstrap failure on x86_64-linux-gnu (32bit multilib): ICE: Maximum number of LRA assignment passes is achieved (30)

[doko at debian dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88171

            Bug ID: 88171
           Summary: [9 Regression] libgo bootstrap failure on
                    x86_64-linux-gnu (32bit multilib): ICE: Maximum number
                    of LRA assignment passes is achieved (30)
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: doko at debian dot org
                CC: cmang at google dot com
  Target Milestone: ---

seen with 20181123, r266404:

during RTL pass: reload
../../../../src/libgo/go/encoding/gob/decode.go: In function
'gob.decodeSlice..1encoding/gob.Decoder':
../../../../src/libgo/go/encoding/gob/decode.go:613:1: internal compiler error:
Maximum number of LRA assignment passes is achieved (30)

  613 | func (dec *Decoder) decodeSlice(state *decoderState, value
reflect.Value, elemOp decOp, ovfl error, helper decHelper) {
      | ^
0xbc84ae lra_assign(bool&)
        ../../src/gcc/lra-assigns.c:1669
0xbc323d lra(_IO_FILE*)
        ../../src/gcc/lra.c:2508
0xb7af79 do_reload
        ../../src/gcc/ira.c:5469
0xb7af79 execute
        ../../src/gcc/ira.c:5653
Please submit a full bug report,
with preprocessed source if appropriate.
make[10]: *** [Makefile:2835: encoding/gob.lo] Error 1
make[10]: Leaving directory '/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/32/libgo'
make[9]: *** [Makefile:2233: all-recursive] Error 1
make[9]: Leaving directory '/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/32/libgo'
make[8]: *** [Makefile:1158: all] Error 2
make[8]: Leaving directory '/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/32/libgo'
make[7]: *** [Makefile:3059: multi-do] Error 1
make[7]: Leaving directory '/<<PKGBUILDDIR>>/build/x86_64-linux-gnu/libgo'
make[6]: *** [Makefile:3027: all-multi] Error 2