cmd/pprof: TestDisasm failures

[gopherbot]

#!watchflakes
post <- pkg == "cmd/pprof" && test == "TestDisasm"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestDisasm (1.41s)
    pprof_test.go:118: pprof failed: exit status 2
        no matches found for regexp: main.main

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg == "cmd/pprof" && test == "TestDisasm"

2022-10-24 16:31 linux-arm64 go@65f86352 cmd/pprof.TestDisasm (log)

--- FAIL: TestDisasm (1.41s)
    pprof_test.go:118: pprof failed: exit status 2
        no matches found for regexp: main.main

2022-11-03 19:34 linux-arm64 go@3511c822 cmd/pprof.TestDisasm (log)

--- FAIL: TestDisasm (1.42s)
    pprof_test.go:118: pprof failed: exit status 2
        no matches found for regexp: main.main

2022-11-04 14:19 linux-arm64 go@7ddbadb3 cmd/pprof.TestDisasm (log)

--- FAIL: TestDisasm (1.41s)
    pprof_test.go:118: pprof failed: exit status 2
        no matches found for regexp: main.main

— watchflakes

[cherrymui]

This seems on the new linux-arm64 builder (#53851). @cagedmantis do you think the new builder is stable and reliable, or there is still some issue? Thanks.

[cagedmantis]

@cherrymui The builder should be stable and reliable enough where any issue should be investigated.

[gopherbot]

Change https://go.dev/cl/450281 mentions this issue: cmd/pprof: debug TestDisasm

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg == "cmd/pprof" && test == "TestDisasm"

2022-11-15 00:02 linux-arm64 go@e6ebbefa cmd/pprof.TestDisasm (log)

--- FAIL: TestDisasm (1.41s)
    pprof_test.go:118: pprof failed: exit status 2
        no matches found for regexp: main.main

— watchflakes

[cherrymui]

Unfortunately the failure on 11-15 is still before my debugging CL landed. We'll see if we can get some information if a new failure occurs.

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg == "cmd/pprof" && test == "TestDisasm"

2022-11-17 17:24 linux-arm64 go@5c834a2e cmd/pprof.TestDisasm (log)

--- FAIL: TestDisasm (1.43s)
    pprof_test.go:110: pprof -disasm failed: exit status 2
        no matches found for regexp: main.main
    pprof_test.go:118: profile content:
        PeriodType: cpu nanoseconds
        Period: 10000000
        Time: 2022-11-17 17:34:46.01668506 +0000 UTC
        Duration: 1.10
        Samples:
        samples/count cpu/nanoseconds
                 97  970000000: 1 
                  1   10000000: 2 
        Locations
             1: 0x6fa94 M=1 runtime.nanotime1 /tmp/workdir/go/src/runtime/sys_linux_arm64.s:377 s=311
             2: 0x6fa98 M=1 runtime.nanotime1 /tmp/workdir/go/src/runtime/sys_linux_arm64.s:378 s=311
        Mappings
        1: 0x10000/0xb8000/0x0 /tmp/workdir/tmp/TestDisasm2297534319/001/cpu.exe  [FN]

2022-11-17 21:15 linux-arm64 go@1f4394a0 cmd/pprof.TestDisasm (log)

--- FAIL: TestDisasm (1.50s)
    pprof_test.go:110: pprof -disasm failed: exit status 2
        no matches found for regexp: main.main
    pprof_test.go:118: profile content:
        PeriodType: cpu nanoseconds
        Period: 10000000
        Time: 2022-11-17 21:25:17.962118619 +0000 UTC
        Duration: 1.10
        Samples:
        samples/count cpu/nanoseconds
                 93  930000000: 1 
                  2   20000000: 2 
                  1   10000000: 3 
                  1   10000000: 4 
                  1   10000000: 5 
        Locations
             1: 0x6fa94 M=1 runtime.nanotime1 /tmp/workdir/go/src/runtime/sys_linux_arm64.s:377 s=311
             2: 0x6fa98 M=1 runtime.nanotime1 /tmp/workdir/go/src/runtime/sys_linux_arm64.s:378 s=311
             3: 0x6fa30 M=1 runtime.nanotime1 /tmp/workdir/go/src/runtime/sys_linux_arm64.s:333 s=311
             4: 0x6fa08 M=1 runtime.nanotime1 /tmp/workdir/go/src/runtime/sys_linux_arm64.s:320 s=311
             5: 0x6fa28 M=1 runtime.nanotime1 /tmp/workdir/go/src/runtime/sys_linux_arm64.s:330 s=311
        Mappings
        1: 0x10000/0xb8000/0x0 /tmp/workdir/tmp/TestDisasm4084982061/001/cpu.exe  [FN]

— watchflakes