cmd/go: occasional failures on gotip-linux-amd64-racegocommand-noopt builder during `go install -race cmd/go` step

[dmitshur]

The gotip-linux-amd64-racegocommand-noopt builder has had a couple failures while running go install -race cmd/go (complete environment details):

• https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8679889528675512705/+/u/step/10/log/2
• https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8679451269826264593/+/u/step/10/log/2
• https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8679447389821952577/+/u/step/10/log/2

The failures happen in slightly different places, but involve typechecking that ends up running into an internal compiler error.

Trying the same invocation 100 times, with GO_GCFLAGS=-N -l and clearing GOCACHE each time so far didn't reproduce it on darwin/arm64. Filing this issue to track progress figuring this out.

CC @golang/command-line.

[gabyhelp]

Related Issues

• x/tools/gopls/internal/cmd: unrecognized failures #78106 (closed)
• cmd/compile: racecompile builder failures on multiple packages #28170 (closed)
• x/tools/gopls/internal/cache: unrecognized failures #78104 (closed)
• cmd/compile: unexplained compiler panic build flakes #78081 (closed)
• cmd/go/internal/cfg: unrecognized failures #79670
• cmd/compile/internal/types2: unrecognized failures #61290 (closed)
• cmd/link/internal/ld: unrecognized failures #78033
• cmd/asm/internal/flags: unrecognized failures #78120 (closed)
• Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.: unrecognized failures #64149 (closed)
• cmd/compile: internal error: type recorded as live on entry #15176 (closed)

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[gopherbot]

Change https://go.dev/cl/789380 mentions this issue: main.star: add a linux-amd64-racegocommand builder at tip