cmd/internal/testdir: Test/fixedbugs/issue66663.go failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/fixedbugs/issue66663.go"

Issue created automatically to collect these failures.

Example (log):

=== RUN   Test/fixedbugs/issue66663.go
=== PAUSE Test/fixedbugs/issue66663.go
=== CONT  Test/fixedbugs/issue66663.go
    testdir_test.go:147: exit status 2
        panic: inconsistent reference counts
        
        goroutine 7 gp=0x3d34001a40 m=3 mp=0x3d34055008 [running]:
        panic({0x5f9380?, 0x7f7340?})
        	runtime/panic.go:806 +0x13c fp=0x3d340516f8 sp=0x3d34051650 pc=0x8248c
        os.(*Process).handleTransientAcquire(0x0?)
...
        runtime.selectgo(0x3d34050fb0, 0x3d34050f98, 0x0?, 0x0, 0x0?, 0x1)
        	runtime/select.go:351 +0x6f8 fp=0x3d34050f58 sp=0x3d34050e38 pc=0x61e10
        runtime.ensureSigM.func1()
        	runtime/signal_unix.go:1085 +0x1c8 fp=0x3d34050fd8 sp=0x3d34050f58 pc=0x7d880
        runtime.goexit({})
        	runtime/asm_riscv64.s:539 +0x4 fp=0x3d34050fd8 sp=0x3d34050fd8 pc=0x891cc
        created by runtime.ensureSigM in goroutine 1
        	runtime/signal_unix.go:1068 +0xdc
        
--- FAIL: Test/fixedbugs/issue66663.go (0.48s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/fixedbugs/issue66663.go"

2025-02-05 05:26 gotip-linux-riscv64 go@842e4b52 cmd/internal/testdir.Test/fixedbugs/issue66663.go (log)

=== RUN   Test/fixedbugs/issue66663.go
=== PAUSE Test/fixedbugs/issue66663.go
=== CONT  Test/fixedbugs/issue66663.go
    testdir_test.go:147: exit status 2
        panic: inconsistent reference counts
        
        goroutine 7 gp=0x3d34001a40 m=3 mp=0x3d34055008 [running]:
        panic({0x5f9380?, 0x7f7340?})
        	runtime/panic.go:806 +0x13c fp=0x3d340516f8 sp=0x3d34051650 pc=0x8248c
        os.(*Process).handleTransientAcquire(0x0?)
...
        runtime.selectgo(0x3d34050fb0, 0x3d34050f98, 0x0?, 0x0, 0x0?, 0x1)
        	runtime/select.go:351 +0x6f8 fp=0x3d34050f58 sp=0x3d34050e38 pc=0x61e10
        runtime.ensureSigM.func1()
        	runtime/signal_unix.go:1085 +0x1c8 fp=0x3d34050fd8 sp=0x3d34050f58 pc=0x7d880
        runtime.goexit({})
        	runtime/asm_riscv64.s:539 +0x4 fp=0x3d34050fd8 sp=0x3d34050fd8 pc=0x891cc
        created by runtime.ensureSigM in goroutine 1
        	runtime/signal_unix.go:1068 +0xdc
        
--- FAIL: Test/fixedbugs/issue66663.go (0.48s)

— watchflakes

[ianlancetaylor]

Same as #71564.