math/big: TestMulUnbalanced failures

[gopherbot]

#!watchflakes
default <- pkg == "math/big" && test == "TestMulUnbalanced"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestMulUnbalanced
SIGBUS: bus error
PC=0x6ff0e70 m=2 sigcode=2 addr=0x72fc36d

goroutine 0 gp=0xc000006a80 m=2 mp=0xc000050808 [idle]:

goroutine 198 gp=0xc000103180 m=2 mp=0xc000050808 [running]:
runtime.systemstack_switch()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:478 +0x8 fp=0xc000061cb0 sp=0xc000061ca0 pc=0x70966e8
runtime.startTheWorld({0x28?, 0x7090f35?, 0xc000061d28?, 0xc000103180?})
...
r11    0x0
r12    0x1000000000000000
r13    0x10000000000fffff
r14    0x7716d00
r15    0x2000000000000000
rip    0x6ff0e70
rflags 0x10206
cs     0x2b
fs     0x0
gs     0x0

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "math/big" && test == "TestMulUnbalanced"

2025-08-11 19:12 gotip-darwin-amd64-race go@cf4af0b2 math/big.TestMulUnbalanced [SKIP] (log)

=== RUN   TestMulUnbalanced
SIGBUS: bus error
PC=0x6ff0e70 m=2 sigcode=2 addr=0x72fc36d

goroutine 0 gp=0xc000006a80 m=2 mp=0xc000050808 [idle]:

goroutine 198 gp=0xc000103180 m=2 mp=0xc000050808 [running]:
runtime.systemstack_switch()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_amd64.s:478 +0x8 fp=0xc000061cb0 sp=0xc000061ca0 pc=0x70966e8
runtime.startTheWorld({0x28?, 0x7090f35?, 0xc000061d28?, 0xc000103180?})
...
r11    0x0
r12    0x1000000000000000
r13    0x10000000000fffff
r14    0x7716d00
r15    0x2000000000000000
rip    0x6ff0e70
rflags 0x10206
cs     0x2b
fs     0x0
gs     0x0

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "math/big" && test == "TestMulUnbalanced"

2025-08-12 05:36 gotip-darwin-arm64-race go@c3135913 math/big.TestMulUnbalanced [SKIP] (log)

=== RUN   TestMulUnbalanced
SIGBUS: bus error
PC=0x10080da34 m=6 sigcode=1 addr=0x100a8e7e0

goroutine 0 gp=0xc000082c40 m=6 mp=0xc000080808 [idle]:

goroutine 203 gp=0xc00010d500 m=6 mp=0xc000080808 [running]:
runtime.systemstack_switch()
	/Users/swarming/.swarming/w/ir/x/w/goroot/src/runtime/asm_arm64.s:249 +0x8 fp=0xc000056c80 sp=0xc000056c70 pc=0x1008a9998
runtime.startTheWorld({0x8?, 0x1008b2260?, 0xc00010d500?, 0xc00010d500?})
...
r24     0x0
r25     0x185aeef1a279d178
r26     0x16f95ad08
r27     0x40
r28     0xc000082c40
r29     0x16f95acc8
lr      0x10080d5d8
sp      0x16f95ac30
pc      0x10080da34
fault   0x100a8e7e0

— watchflakes