cmd/compile,runtime: SIGILL on `linux-loong64-3a5000`

[bcmills]

#!watchflakes
post <- builder ~ `^linux-loong64` && `signal: illegal instruction \(core dumped\)`

signal: illegal instruction (core dumped)
FAIL	cmd/go/internal/modfetch	0.362s

greplogs -l -e '(?ms)\Alinux-loong64-.*signal: illegal instruction \(core dumped\)'
2022-05-24T17:02:34-70668a4/linux-loong64-3a5000

(attn @golang/loong64)

[abner-chenc]

ok  	os/exec/internal/fdtest	0.016s
signal: illegal instruction (core dumped)
FAIL	os/signal	0.129s
ok  	os/user	0.005s

Sorry, We're having the same issue and we're analysing what's causing it.

[xen0n]

I can't reproduce this.

##### Test execution environment.             
# GOARCH: loong64                             
# CPU:                                        
# GOOS: linux                                 
# OS Version: Linux 5.17.0-00067-g8d427f9dd274 #10 SMP PREEMPT Sun May 22 09:34:01 AM CST 2022 loongarch64

Try bumping your kernel version and/or bootstrap toolchain version?

[xen0n]

(My kernel is my handmade https://github.com/xen0n/linux/tree/loongarch-playground-v13.101, FYI. (Basically the last known good version to boot on old firmware, but with UAPI manually upgraded to latest.)

[xen0n]

@abner-chenc Hi, do you still see this issue appearing in your daily development? I assume you should be using a more recent system for a while.

[gopherbot]

Change https://go.dev/cl/465156 mentions this issue: dashboard: unmark known-issues with low failure rates