Golang x/build: go/internal/gcimporter test fail consistently on AIX builder

The AIX builder is failing consistently https://build.golang.org/log/0ec7e4b9b40f35a8dc5b6e15a1cf367c3dc75998

--- FAIL: TestImportTestdata (0.05s)
    gcimporter_test.go:58: compile: /dev/null:1: unknown directive "Disconnected"
    gcimporter_test.go:59: go tool compile generics.go failed: exit status 1
--- FAIL: TestTypeNamingOrder (0.03s)
    gcimporter_test.go:58: compile: /dev/null:1: unknown directive "Disconnected"
    gcimporter_test.go:59: go tool compile g.go failed: exit status 1
--- FAIL: TestIssue15517 (0.03s)
    gcimporter_test.go:58: compile: /dev/null:1: unknown directive "Disconnected"
    gcimporter_test.go:59: go tool compile p.go failed: exit status 1
--- FAIL: TestIssue15920 (0.03s)
    gcimporter_test.go:58: compile: /dev/null:1: unknown directive "Disconnected"
    gcimporter_test.go:59: go tool compile issue15920.go failed: exit status 1
--- FAIL: TestIssue20046 (0.03s)
    gcimporter_test.go:58: compile: /dev/null:1: unknown directive "Disconnected"
    gcimporter_test.go:59: go tool compile issue20046.go failed: exit status 1
--- FAIL: TestIssue25301 (0.03s)
    gcimporter_test.go:58: compile: /dev/null:1: unknown directive "Disconnected"
    gcimporter_test.go:59: go tool compile issue25301.go failed: exit status 1
--- FAIL: TestIssue25596 (0.03s)
    gcimporter_test.go:58: compile: /dev/null:1: unknown directive "Disconnected"
    gcimporter_test.go:59: go tool compile issue25596.go failed: exit status 1
--- FAIL: TestIssue57015 (0.03s)
    gcimporter_test.go:58: compile: /dev/null:1: unknown directive "Disconnected"
    gcimporter_test.go:59: go tool compile issue57015.go failed: exit status 1
FAIL
FAIL    go/internal/gcimporter  3.492s

It started to fail since CL 596715, which is comment-only. It also fails on the release branches. So it is more likely something changed in the builder?

cc @golang/aix

Comment From: gabyhelp

Related Issues and Documentation

• x/build: AIX builders fail with "unknown directive "Disconnected" " #68481
• x/tools: Tests failing with unified IR builders #52150 (closed)
• go/internal/gccgoimporter: TestInstallationImporter and TestObjImporter failing on AIX #29113 (closed)
• cmd/go: new internal/goroot test broke aix, illumos, solaris builders #34390 (closed)
• cmd/go: TestScript/mod_doc_path and TestScript/cgo_stale_precompiled fail on AIX builder #66344 (closed)
• x/tools/go/internal/gcimporter: frequent failures with SIGSEGV on openbsd-386-64 builder #36563 (closed)
• go/internal/gccgoimporter: TestObjImporter fails on solaris/illumos #31764 (closed)
• x/tools/go/internal/gccgoimporter: TestInstallationImporter failures with "bad magic number" on aix-ppc64 #49445 (closed)
• go/internal/srcimporter: failure in TestImportStdLib and TestImportCgo with `exit status 1` on linux-s390x-ibm #52407 (closed)
• x/tools: tests consistently failing on linux-amd64-longtest builder #32831 (closed)

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Comment From: cherrymui

Dup of #68481. Thanks @gabyhelp