On Wed, 2023-08-16 at 23:43 -0700, metronome wrote:
> Thanks for commenting, a few supplements.
>
> # 1. Version of Go?
> We observed the issue with both go1.20.5 and go1.18.10 on linux/amd64
> (centos)
>
> # 2. Context?
> All panics we observed so far are from either
> strconv.FormatInt -> strconv.formatBits chain, or
> strconv.FormatUint -> strconv.formatBits chain
> where the base is always 10.
>
> // typical call site, toId is an "*int64".
> if com_count > 1 {
> com_string = anchor + "," + strconv.FormatInt(*toId, 10)
> }
>
> # 3. If your program using pure Go (statically linked) or Cgo?
> Binary was built with CGO_ENABLED=1 and -buildmode=exe.
> All panic call sites we observed so far are "pure go", that is, no C
> calling go path.
>
> # 4. panic stack trace
> panic: runtime error: index out of range [18446744073708732603] with
> length 200
>
> goroutine 1 [running]:
> strconv.formatBits({0x0?, 0x0?, 0x0?}, 0xc09e00b750?, 0x1?, 0x1?,
> 0x0?)
> /usr/lib/go-1.20/src/strconv/itoa.go:140 +0x4b9
> strconv.FormatInt(0x0?, 0xc07393df80?)
> /usr/lib/go-1.20/src/strconv/itoa.go:29 +0xa5
> ...
Have you eliminated the possibility of races? Have you built with
CGO_ENABLED=0?
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