runtime/race: TestRandomScheduling failures

[gopherbot]

#!watchflakes
default <- pkg == "runtime/race" && test == "TestRandomScheduling"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestRandomScheduling
SIGBUS: bus error
PC=0x45c5e70 m=0 sigcode=2 addr=0x46a3ee5

goroutine 0 gp=0x49941c0 m=0 mp=0x4995100 [idle]:

goroutine 57 gp=0xc000083180 m=0 mp=0x4995100 [running]:
runtime.systemstack_switch()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:478 +0x8 fp=0xc000061c00 sp=0xc000061bf0 pc=0x46694e8
runtime.startTheWorld({0xb8?, 0x0?, 0x1000100045a3240?, 0xc000083180?})
...
r11    0x0
r12    0x1000000000000000
r13    0x10000000000fffff
r14    0x49b9400
r15    0x2000000000000000
rip    0x45c5e70
rflags 0x10286
cs     0x2b
fs     0x0
gs     0x0

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime/race" && test == "TestRandomScheduling"

2025-08-12 13:28 gotip-darwin-amd64-race go@00a7bdcb runtime/race.TestRandomScheduling [SKIP] (log)

=== RUN   TestRandomScheduling
SIGBUS: bus error
PC=0x45c5e70 m=0 sigcode=2 addr=0x46a3ee5

goroutine 0 gp=0x49941c0 m=0 mp=0x4995100 [idle]:

goroutine 57 gp=0xc000083180 m=0 mp=0x4995100 [running]:
runtime.systemstack_switch()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:478 +0x8 fp=0xc000061c00 sp=0xc000061bf0 pc=0x46694e8
runtime.startTheWorld({0xb8?, 0x0?, 0x1000100045a3240?, 0xc000083180?})
...
r11    0x0
r12    0x1000000000000000
r13    0x10000000000fffff
r14    0x49b9400
r15    0x2000000000000000
rip    0x45c5e70
rflags 0x10286
cs     0x2b
fs     0x0
gs     0x0

— watchflakes