[Bug go/77969] New: go testsuite shows ICEs and runtime errors with -flto [-g]

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77969

            Bug ID: 77969
           Summary: go testsuite shows ICEs and runtime errors with -flto
                    [-g]
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: rguenth at gcc dot gnu.org
                CC: cmang at google dot com
  Target Milestone: ---

I saw the following a few weeks ago:

Running target unix/-flto/-g/
FAIL: go.test/test/chan/select5.go -O (internal compiler error)
FAIL: go.test/test/chan/select5.go -O (test for excess errors)
FAIL: go.test/test/chan/select5.go execution
FAIL: go.test/test/fixedbugs/bug206.go -O (internal compiler error)
FAIL: go.test/test/fixedbugs/bug206.go -O (test for excess errors)
FAIL: go.test/test/fixedbugs/bug206.go execution
FAIL: go.test/test/fixedbugs/bug392.dir/pkg2.go  -O (internal compiler error)
FAIL: go.test/test/fixedbugs/bug392.dir/pkg2.go  -O (test for excess errors)
FAIL: go.test/test/fixedbugs/bug392.dir/pkg3.go  -O (test for excess errors)
FAIL: go.test/test/fixedbugs/issue4932.dir/state2.go  -O (internal compiler
error)
FAIL: go.test/test/fixedbugs/issue4932.dir/state2.go  -O (test for excess
errors)
FAIL: go.test/test/fixedbugs/issue5291.dir/prog.go,  -O2 -g  (internal compiler
error)
FAIL: go.test/test/fixedbugs/issue5910.dir/main.go  -O (internal compiler
error)
FAIL: go.test/test/fixedbugs/issue5910.dir/main.go  -O (test for excess errors)
FAIL: go.test/test/index0.go -O (internal compiler error)
FAIL: go.test/test/index0.go -O (test for excess errors)
FAIL: go.test/test/index0.go execution
FAIL: go.test/test/index1.go -O (internal compiler error)
FAIL: go.test/test/index1.go -O (test for excess errors)
FAIL: go.test/test/index1.go execution
FAIL: go.test/test/index2.go -O (internal compiler error)
FAIL: go.test/test/index2.go -O (test for excess errors)
FAIL: go.test/test/index2.go execution