runtime/pprof: TestVMInfo failures

[gopherbot]

#!watchflakes
post <- pkg == "runtime/pprof" && test == "TestVMInfo"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestVMInfo (0.37s)
    vminfo_darwin_test.go:59: exit status 255

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime/pprof" && test == "TestVMInfo"

2023-08-29 16:16 darwin-amd64-nocgo go@4e48e467 runtime/pprof.TestVMInfo (log)

--- FAIL: TestVMInfo (0.37s)
    vminfo_darwin_test.go:59: exit status 255

— watchflakes

[bcmills]

This test is new during the Go 1.22 cycle (https://go.dev/cl/503919; attn @cosnicolaou @cherrymui).

A good starting point would probably be to update the test to log the Stderr field of the *exec.ExitError on failure:
https://cs.opensource.google/go/go/+/master:src/runtime/pprof/vminfo_darwin_test.go;l=59;drc=fdc9cf3c3aaf779387f0341125680f018e5f0275

[cosnicolaou]

Ok, see https://go-review.googlesource.com/c/go/+/524156

[gopherbot]

Change https://go.dev/cl/524156 mentions this issue: runtime/pprof: print stderr on test failure

[bcmills]

The new logging is in place, so I've marked this WaitingForInfo to see what turns up after https://go.dev/cl/524936.