runtime error : integer divided by zero. Facing this issue when I am trying to run go-prompt as a docker container

[ssreenivasrb]

go-prompt/render.go

Line 248 in e99fbc7

if cursor > 0 && cursor%col == 0 {

[c-bata]

Thanks for reporting. just a minute please.

[c-bata]

Fixed by @orisano. Thanks.

[ssreenivasrb]

The above issue still presists:
The logs when the issue reoccured and i am using the go-prompt release version 0.2.1

panic: runtime error: integer divide by zero

goroutine 1 [running]:
/github.com/c-bata/go-prompt.(*Render).toPos(...)
/tmp/build-prompt-1.0.0-631788168/src//github.com/c-bata/go-prompt/render.go:248
/github.com/c-bata/go-prompt.(*Render).move(0xc42007d860, 0x5, 0x5, 0xc42001459e)
/tmp/build-prompt-1.0.0-631788168/src//github.com/c-bata/go-prompt/render.go:232 +0x1a7
/github.com/c-bata/go-prompt.(*Render).backward(0xc42007d860, 0x5, 0x0, 0xc420039c00)
/tmp/build-prompt-1.0.0-631788168/src//github.com/c-bata/go-prompt/render.go:228 +0x42
/github.com/c-bata/go-prompt.(*Render).Render(0xc42007d860, 0xc42004a380, 0xc42004a400)
/tmp/build-prompt-1.0.0-631788168/src//github.com/c-bata/go-prompt/render.go:191 +0x16d
/github.com/c-bata/go-prompt.(*Prompt).Run(0xc42004e3c0)
/tmp/build-prompt-1.0.0-631788168/src//github.com/c-bata/go-prompt/prompt.go:52 +0xdf

[ssreenivasrb]

Hey c-bata,
Thank you for quick response on the issue:
I am precently using the below workaround and it works pretty fine, pls review it.

diff ::>>

// x will not return 0 except for the first row.
func (r *Render) toPos(cursor int) (x, y int) {
col := int(r.col)

//code changes

if col == 0 {
	return cursor,cursor
}

//ends here

if cursor > 0 && cursor%col == 0 {
	return col - 1, cursor/col - 1
}

[x168]

I am also facing the same problem with v0.2.3, should I use the above workaround? Since I saw the method toPos is modified after v0.2.1, but don't know why.

[sebastianst]

I'd like to reopen this issue @c-bata, it still exists. It is fixed by PR #172 .