crypto/ed25519: unrecognized failures

[gopherbot]

#!watchflakes
default <- pkg == "crypto/ed25519" && test == ""

Issue created automatically to collect these failures.

Example (log):

PASS
ok  	crypto/ed25519	0.043s

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "crypto/ed25519" && test == ""

2025-10-09 16:13 gotip-linux-amd64_avx512 go@9db7e30b crypto/ed25519 [PASS] (log)

PASS
ok  	crypto/ed25519	0.043s

— watchflakes

[FiloSottile]

cmd/vet failed with

# crypto/ed25519
fatal error: stopTheWorld: broken CPU time accounting

runtime stack:
runtime.throw({0x83770d?, 0x9887ee?})
	runtime/panic.go:1227 +0x48 fp=0x7fffeb6b7868 sp=0x7fffeb6b7838 pc=0x487be8
runtime.stopTheWorldWithSema(0x2)
	runtime/proc.go:1740 +0x478 fp=0x7fffeb6b7918 sp=0x7fffeb6b7868 pc=0x4587d8
runtime.gcStart.func2()
	runtime/mgc.go:833 +0x25 fp=0x7fffeb6b7938 sp=0x7fffeb6b7918 pc=0x431a65
runtime.systemstack(0x4907df)
	runtime/asm_amd64.s:529 +0x4a fp=0x7fffeb6b7948 sp=0x7fffeb6b7938 pc=0x48caea

which I can't match to any open issue.