runtime/pprof: flaky TestGenericsHashKeyInPprofBuilder

[prattmic]

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

This test failed in CI: https://ci.chromium.org/ui/p/golang/builders/try/gotip-linux-amd64-staticlockranking/b8732088109106960193/test-results?sortby=&groupby=

The problem is we got

testing.tRunner;runtime/pprof.TestGenericsHashKeyInPprofBuilder;runtime/pprof.genericAllocFunc[go.shape.uint32] [1 128 1 128]

but want

testing.tRunner;runtime/pprof.TestGenericsHashKeyInPprofBuilder;runtime/pprof.genericAllocFunc[go.shape.uint32] [1 128 0 0]

I think this is saying that the allocation is unexpectedly live. The 128 one at https://cs.opensource.google/go/go/+/master:src/runtime/pprof/protomem_test.go;l=132;drc=6f59c11155d75024985d4827a7fe155cd6561df9.

This test isn't intending to test liveness at all, so ignoring that field likely makes the most sense.

cc @golang/runtime

[gabyhelp]

Related Issues and Documentation

• runtime/pprof: TestProfilerStackDepth/heap failures #70112 (closed)
• runtime/pprof: TestBlockMutexProfileInlineExpansion/block failures [consistent failure] #69764 (closed)
• runtime/pprof: TestMutexProfile failures #62094
• runtime/pprof: TestBlockMutexProfileInlineExpansion/mutex failures #69765 (closed)
• runtime/pprof: incorrect function names for generics functions #64528 (closed)
• runtime/pprof: TestGoroutineProfileConcurrency failures with `profile includes finalizer` #56875
• runtime/pprof: TestProfilerStackDepth/mutex failures #68562 (closed)
• runtime/pprof: TestGoroutineProfileConcurrency/finalizer_present failures #68456 (closed)
• runtime/pprof: test timed out in `StartCPUProfile` #60108 (closed)
• net/http/pprof: TestDeltaProfile failures #61715

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