testing: TestRunParallel failures [consistent failure]

[gopherbot]

#!watchflakes
default <- pkg == "testing" && test == "TestRunParallel"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestRunParallel
panic: unaligned 64-bit atomic operation

goroutine 512 gp=0xa4838c8 m=8 mp=0xa402008 [running]:
panic({0x8225ba0, 0x82a4898})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:802 +0x144 fp=0xa534f98 sp=0xa534f44 pc=0x80bfd74
internal/runtime/atomic.panicUnaligned()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/unaligned.go:8 +0x2d fp=0xa534fa4 sp=0xa534f98 pc=0x804b01d
internal/runtime/atomic.Xadd64(0xa4121a4, 0x1)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/atomic_386.s:127 +0x11 fp=0xa534fa8 sp=0xa534fa4 pc=0x804b1e1
...
created by testing.(*B).RunParallel in goroutine 492
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 +0x188

goroutine 526 gp=0xa706a28 m=nil [runnable]:
testing.(*B).RunParallel.func1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 fp=0xa68aff0 sp=0xa68afec pc=0x815d920
runtime.goexit({})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_386.s:1386 +0x1 fp=0xa68aff4 sp=0xa68aff0 pc=0x80c6591
created by testing.(*B).RunParallel in goroutine 492
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 +0x188

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "testing" && test == "TestRunParallel"

2025-04-04 17:53 gotip-linux-386-longtest go@5fc596eb testing.TestRunParallel [ABORT] (log)

=== RUN   TestRunParallel
panic: unaligned 64-bit atomic operation

goroutine 512 gp=0xa4838c8 m=8 mp=0xa402008 [running]:
panic({0x8225ba0, 0x82a4898})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:802 +0x144 fp=0xa534f98 sp=0xa534f44 pc=0x80bfd74
internal/runtime/atomic.panicUnaligned()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/unaligned.go:8 +0x2d fp=0xa534fa4 sp=0xa534f98 pc=0x804b01d
internal/runtime/atomic.Xadd64(0xa4121a4, 0x1)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/atomic_386.s:127 +0x11 fp=0xa534fa8 sp=0xa534fa4 pc=0x804b1e1
...
created by testing.(*B).RunParallel in goroutine 492
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 +0x188

goroutine 526 gp=0xa706a28 m=nil [runnable]:
testing.(*B).RunParallel.func1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 fp=0xa68aff0 sp=0xa68afec pc=0x815d920
runtime.goexit({})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_386.s:1386 +0x1 fp=0xa68aff4 sp=0xa68aff0 pc=0x80c6591
created by testing.(*B).RunParallel in goroutine 492
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 +0x188

2025-04-04 21:00 gotip-linux-386-longtest go@7e60bdd7 testing.TestRunParallel [ABORT] (log)

=== RUN   TestRunParallel
panic: unaligned 64-bit atomic operation

goroutine 446 gp=0x9264128 m=6 mp=0x9100808 [running]:
panic({0x8225ba0, 0x82a48f8})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:802 +0x144 fp=0x90e1798 sp=0x90e1744 pc=0x80bfd74
internal/runtime/atomic.panicUnaligned()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/unaligned.go:8 +0x2d fp=0x90e17a4 sp=0x90e1798 pc=0x804b01d
internal/runtime/atomic.Xadd64(0x90121a4, 0x1)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/atomic_386.s:127 +0x11 fp=0x90e17a8 sp=0x90e17a4 pc=0x804b1e1
...
created by testing.(*B).RunParallel in goroutine 499
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 +0x188

goroutine 538 gp=0x91379e8 m=nil [runnable]:
testing.(*B).RunParallel.func1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 fp=0x9161ff0 sp=0x9161fec pc=0x815d920
runtime.goexit({})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_386.s:1386 +0x1 fp=0x9161ff4 sp=0x9161ff0 pc=0x80c6591
created by testing.(*B).RunParallel in goroutine 499
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 +0x188

2025-04-04 22:04 gotip-linux-386-longtest go@2d050e91 testing.TestRunParallel [ABORT] (log)

=== RUN   TestRunParallel
panic: unaligned 64-bit atomic operation

goroutine 529 gp=0x94db8c8 m=7 mp=0x9481008 [running]:
panic({0x8225ba0, 0x82a49f8})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:802 +0x144 fp=0x94c4f98 sp=0x94c4f44 pc=0x80bfd74
internal/runtime/atomic.panicUnaligned()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/unaligned.go:8 +0x2d fp=0x94c4fa4 sp=0x94c4f98 pc=0x804b01d
internal/runtime/atomic.Xadd64(0x94121a4, 0x1)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/atomic_386.s:127 +0x11 fp=0x94c4fa8 sp=0x94c4fa4 pc=0x804b1e1
...
testing_test.TestRunParallel.func1(0x950c548)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark_test.go:82 +0xc1 fp=0x9534f8c sp=0x9534f50 pc=0x81f1e11
testing.(*B).runN(0x950c548, 0x1)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:219 +0x177 fp=0x9534fd4 sp=0x9534f8c pc=0x8159d57
testing.(*B).run1.func1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:245 +0x51 fp=0x9534ff0 sp=0x9534fd4 pc=0x815a3a1
runtime.goexit({})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_386.s:1386 +0x1 fp=0x9534ff4 sp=0x9534ff0 pc=0x80c6591
created by testing.(*B).run1 in goroutine 461
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:238 +0x8e

2025-04-04 22:26 gotip-linux-386-longtest go@e3737714 testing.TestRunParallel [ABORT] (log)

=== RUN   TestRunParallel
panic: unaligned 64-bit atomic operation

goroutine 547 gp=0x9981568 m=6 mp=0x987e808 [running]:
panic({0x8225ba0, 0x82a49f8})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/panic.go:802 +0x144 fp=0x98f5f98 sp=0x98f5f44 pc=0x80bfd74
internal/runtime/atomic.panicUnaligned()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/unaligned.go:8 +0x2d fp=0x98f5fa4 sp=0x98f5f98 pc=0x804b01d
internal/runtime/atomic.Xadd64(0x98121a4, 0x1)
	/home/swarming/.swarming/w/ir/x/w/goroot/src/internal/runtime/atomic/atomic_386.s:127 +0x11 fp=0x98f5fa8 sp=0x98f5fa4 pc=0x804b1e1
...
created by testing.(*B).RunParallel in goroutine 499
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 +0x188

goroutine 480 gp=0x99837a8 m=nil [runnable]:
testing.(*B).RunParallel.func1()
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 fp=0x9999ff0 sp=0x9999fec pc=0x815d9c0
runtime.goexit({})
	/home/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_386.s:1386 +0x1 fp=0x9999ff4 sp=0x9999ff0 pc=0x80c6591
created by testing.(*B).RunParallel in goroutine 499
	/home/swarming/.swarming/w/ir/x/w/goroot/src/testing/benchmark.go:968 +0x188

— watchflakes

[randall77]

Fix is at CL 663015

[gopherbot]

Change https://go.dev/cl/663015 mentions this issue: cmd/compile: on 32-bit, bump up align for values that may contain 64-bit fields