cmd/internal/testdir: Test/init1.go failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/init1.go"

Issue created automatically to collect these failures.

Example (log):

=== RUN   Test/init1.go
=== PAUSE Test/init1.go
=== CONT  Test/init1.go
    testdir_test.go:145: exit status 2
        SIGSEGV: segmentation violation
        PC=0x4b5b8 m=9 sigcode=1 addr=0xc0
        
        goroutine 0 gp=0x3f54205dc0 m=9 mp=0x3f54057108 [idle]:
        runtime.preemptone(0x3f54205dc0?)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/proc.go:6297 +0x38 fp=0x3f540c7f28 sp=0x3f540c7f10 pc=0x4b5b8
...
        a7  0x8a75c	s2  0x3f540c7ed0
        s3  0x3f54057108	s4  0x3f540b8000
        s5  0x8	s6  0xffffffff
        s7  0x10d1e0	s8  0x3f540386a8
        s9  0x3f540c7dc8	s10 0x979f8
        s11 0x3f54205dc0	t3  0x3a2d4dbe665a7f
        t4  0xffffffffffffffff	t5  0xc610b4a33cf
        t6  0x3f54038408	pc  0x4b5b8
        
--- FAIL: Test/init1.go (4.96s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/internal/testdir" && test == "Test/init1.go"

2024-06-24 15:28 gotip-linux-riscv64 go@740043f5 cmd/internal/testdir.Test/init1.go (log)

=== RUN   Test/init1.go
=== PAUSE Test/init1.go
=== CONT  Test/init1.go
    testdir_test.go:145: exit status 2
        SIGSEGV: segmentation violation
        PC=0x4b5b8 m=9 sigcode=1 addr=0xc0
        
        goroutine 0 gp=0x3f54205dc0 m=9 mp=0x3f54057108 [idle]:
        runtime.preemptone(0x3f54205dc0?)
        	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/proc.go:6297 +0x38 fp=0x3f540c7f28 sp=0x3f540c7f10 pc=0x4b5b8
...
        a7  0x8a75c	s2  0x3f540c7ed0
        s3  0x3f54057108	s4  0x3f540b8000
        s5  0x8	s6  0xffffffff
        s7  0x10d1e0	s8  0x3f540386a8
        s9  0x3f540c7dc8	s10 0x979f8
        s11 0x3f54205dc0	t3  0x3a2d4dbe665a7f
        t4  0xffffffffffffffff	t5  0xc610b4a33cf
        t6  0x3f54038408	pc  0x4b5b8
        
--- FAIL: Test/init1.go (4.96s)

— watchflakes

[mengzhuo]

Related to #68862 , closed