cmd/internal/bootstrap_test: TestRepeatBootstrap failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/internal/bootstrap_test" && test == "TestRepeatBootstrap"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestRepeatBootstrap
    reboot_test.go:59: GOROOT overlay set up in 8.441881598s
Building Go cmd/dist using /Users/swarming/.swarming/w/ir/x/w/goroot. (go1.23.4-devel_bb8230f80535945648e8b56739ad450cf433eba9 darwin/amd64)
Building Go toolchain1 using /Users/swarming/.swarming/w/ir/x/w/goroot.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
# internal/bisect
runtime: newstack sp=0xc000a3cffe stack=[0xc000a44000, 0xc000a4c000]
	morebuf={pc:0x0 sp:0xc000a3d00e lr:0x0}
...
fatal error: runtime: split stack overflow

runtime stack:
runtime.throw({0xadd9f61?, 0x70000b496e60?})
	runtime/panic.go:1067 +0x48 fp=0x70000b496e18 sp=0x70000b496de8 pc=0xa5482a8
runtime.newstack()
	runtime/stack.go:1061 +0x74d fp=0x70000b496f58 sp=0x70000b496e18 pc=0xa52b34d
runtime.morestack()
	runtime/asm_amd64.s:621 +0x7a fp=0x70000b496f60 sp=0x70000b496f58 pc=0xa54e83a

...
	cmd/compile/internal/gc/compile.go:188 +0x38 fp=0xc002e79fb0 sp=0xc002e79f70 pc=0xa385d98
cmd/compile/internal/gc.compileFunctions.func3.1()
	cmd/compile/internal/gc/compile.go:170 +0x30 fp=0xc002e79fe0 sp=0xc002e79fb0 pc=0xa386190
runtime.goexit({})
	runtime/asm_amd64.s:1700 +0x1 fp=0xc002e79fe8 sp=0xc002e79fe0 pc=0x9b46581
created by cmd/compile/internal/gc.compileFunctions.func3 in goroutine 3
	cmd/compile/internal/gc/compile.go:169 +0x247
go tool dist: FAILED: /Users/swarming/.swarming/w/ir/x/t/TestRepeatBootstrap2135723931/001/goroot/pkg/tool/darwin_amd64/go_bootstrap install -a cmd/asm cmd/cgo cmd/compile cmd/link cmd/preprofile: exit status 1
    reboot_test.go:82: exit status 2
--- FAIL: TestRepeatBootstrap (412.72s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/internal/bootstrap_test" && test == "TestRepeatBootstrap"

2025-01-16 19:00 go1.23-darwin-amd64-longtest release-branch.go1.23@bb8230f8 cmd/internal/bootstrap_test.TestRepeatBootstrap (log)

=== RUN   TestRepeatBootstrap
    reboot_test.go:59: GOROOT overlay set up in 8.441881598s
Building Go cmd/dist using /Users/swarming/.swarming/w/ir/x/w/goroot. (go1.23.4-devel_bb8230f80535945648e8b56739ad450cf433eba9 darwin/amd64)
Building Go toolchain1 using /Users/swarming/.swarming/w/ir/x/w/goroot.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
# internal/bisect
runtime: newstack sp=0xc000a3cffe stack=[0xc000a44000, 0xc000a4c000]
	morebuf={pc:0x0 sp:0xc000a3d00e lr:0x0}
...
fatal error: runtime: split stack overflow

runtime stack:
runtime.throw({0xadd9f61?, 0x70000b496e60?})
	runtime/panic.go:1067 +0x48 fp=0x70000b496e18 sp=0x70000b496de8 pc=0xa5482a8
runtime.newstack()
	runtime/stack.go:1061 +0x74d fp=0x70000b496f58 sp=0x70000b496e18 pc=0xa52b34d
runtime.morestack()
	runtime/asm_amd64.s:621 +0x7a fp=0x70000b496f60 sp=0x70000b496f58 pc=0xa54e83a

...
	cmd/compile/internal/gc/compile.go:188 +0x38 fp=0xc002e79fb0 sp=0xc002e79f70 pc=0xa385d98
cmd/compile/internal/gc.compileFunctions.func3.1()
	cmd/compile/internal/gc/compile.go:170 +0x30 fp=0xc002e79fe0 sp=0xc002e79fb0 pc=0xa386190
runtime.goexit({})
	runtime/asm_amd64.s:1700 +0x1 fp=0xc002e79fe8 sp=0xc002e79fe0 pc=0x9b46581
created by cmd/compile/internal/gc.compileFunctions.func3 in goroutine 3
	cmd/compile/internal/gc/compile.go:169 +0x247
go tool dist: FAILED: /Users/swarming/.swarming/w/ir/x/t/TestRepeatBootstrap2135723931/001/goroot/pkg/tool/darwin_amd64/go_bootstrap install -a cmd/asm cmd/cgo cmd/compile cmd/link cmd/preprofile: exit status 1
    reboot_test.go:82: exit status 2
--- FAIL: TestRepeatBootstrap (412.72s)

— watchflakes