cmd/internal/testdir: Test/fixedbugs/issue20749.go failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/fixedbugs/issue20749.go"

Issue created automatically to collect these failures.

Example (log):

=== RUN   Test/fixedbugs/issue20749.go
=== PAUSE Test/fixedbugs/issue20749.go
=== CONT  Test/fixedbugs/issue20749.go
    testdir_test.go:1190: gc output:
        fatal error: runtime: cannot allocate memory
        
        goroutine 1 gp=0x400004a000 m=0 mp=0x7ff685cc2340 [running, locked to thread]:
        runtime.throw({0x7ff685547d8e?, 0x7ff684bfd2f0?})
        	runtime/panic.go:1069 +0x38 fp=0x400015bbc0 sp=0x400015bb90 pc=0x7ff684c104c8
        runtime.stkbucket(0x1, 0x1ea000, {0x4000038000, 0x5, 0x0?}, 0x1)
...
        fatal error: runtime: cannot allocate memory
        goroutine 1 gp=0x400004a000 m=0 mp=0x7ff685cc2340 [running, locked to thread]:
        runtime.throw({0x7ff685547d8e?, 0x7ff684bfd2f0?})
        	runtime/panic.go:1069 +0x38 fp=0x400015bbc0 sp=0x400015bb90 pc=0x7ff684c104c8
        runtime.stkbucket(0x1, 0x1ea000, {0x4000038000, 0x5, 0x0?}, 0x1)
        	runtime/mprof.go:284 +0x3f4 fp=0x400015bc20 sp=0x400015bbc0 pc=0x7ff684bc7484
        runtime.mProf_Malloc(0x7ff685cc2340, 0x4000180000, 0x1ea000)
        	runtime/mprof.go:450 +0xc0 fp=0x400015bcb0 sp=0x400015bc20 pc=0x7ff684bc78a0
        runtime.profilealloc(0x7ff685cc2340?, 0x4000180000?, 0x1ea000?)
        	runtime/malloc.go:1459 +0x84 fp=0x400015bce0 sp=0x400015bcb0 pc=0x7ff684ba05d4
...
        	runtime/mfinal.go:163 +0x80
        goroutine 6 gp=0x400004b180 m=nil [runnable]:
        runtime.unique_runtime_registerUniqueMapCleanup.gowrap1()
        	runtime/mgc.go:1729 fp=0x4000051fd0 sp=0x4000051fd0 pc=0x7ff684baffe0
        runtime.goexit({})
        	runtime/asm_arm64.s:1223 +0x4 fp=0x4000051fd0 sp=0x4000051fd0 pc=0x7ff684c17794
        created by unique.runtime_registerUniqueMapCleanup in goroutine 1
        	runtime/mgc.go:1729 +0xa0
        
--- FAIL: Test/fixedbugs/issue20749.go (0.50s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/fixedbugs/issue20749.go"

2024-09-20 19:10 gotip-windows-arm64 go@402dc987 cmd/internal/testdir.Test/fixedbugs/issue20749.go (log)

=== RUN   Test/fixedbugs/issue20749.go
=== PAUSE Test/fixedbugs/issue20749.go
=== CONT  Test/fixedbugs/issue20749.go
    testdir_test.go:1190: gc output:
        fatal error: runtime: cannot allocate memory
        
        goroutine 1 gp=0x400004a000 m=0 mp=0x7ff685cc2340 [running, locked to thread]:
        runtime.throw({0x7ff685547d8e?, 0x7ff684bfd2f0?})
        	runtime/panic.go:1069 +0x38 fp=0x400015bbc0 sp=0x400015bb90 pc=0x7ff684c104c8
        runtime.stkbucket(0x1, 0x1ea000, {0x4000038000, 0x5, 0x0?}, 0x1)
...
        fatal error: runtime: cannot allocate memory
        goroutine 1 gp=0x400004a000 m=0 mp=0x7ff685cc2340 [running, locked to thread]:
        runtime.throw({0x7ff685547d8e?, 0x7ff684bfd2f0?})
        	runtime/panic.go:1069 +0x38 fp=0x400015bbc0 sp=0x400015bb90 pc=0x7ff684c104c8
        runtime.stkbucket(0x1, 0x1ea000, {0x4000038000, 0x5, 0x0?}, 0x1)
        	runtime/mprof.go:284 +0x3f4 fp=0x400015bc20 sp=0x400015bbc0 pc=0x7ff684bc7484
        runtime.mProf_Malloc(0x7ff685cc2340, 0x4000180000, 0x1ea000)
        	runtime/mprof.go:450 +0xc0 fp=0x400015bcb0 sp=0x400015bc20 pc=0x7ff684bc78a0
        runtime.profilealloc(0x7ff685cc2340?, 0x4000180000?, 0x1ea000?)
        	runtime/malloc.go:1459 +0x84 fp=0x400015bce0 sp=0x400015bcb0 pc=0x7ff684ba05d4
...
        	runtime/mfinal.go:163 +0x80
        goroutine 6 gp=0x400004b180 m=nil [runnable]:
        runtime.unique_runtime_registerUniqueMapCleanup.gowrap1()
        	runtime/mgc.go:1729 fp=0x4000051fd0 sp=0x4000051fd0 pc=0x7ff684baffe0
        runtime.goexit({})
        	runtime/asm_arm64.s:1223 +0x4 fp=0x4000051fd0 sp=0x4000051fd0 pc=0x7ff684c17794
        created by unique.runtime_registerUniqueMapCleanup in goroutine 1
        	runtime/mgc.go:1729 +0xa0
        
--- FAIL: Test/fixedbugs/issue20749.go (0.50s)

— watchflakes

[dmitshur]

Merged into #69664.