Go parse time error?

[Yukinoshita-Yukino]

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

The Go Playground
Code:
https://play.golang.org/p/0oIjit-r3pp

Does this issue reproduce with the latest release?

I guess so?

What operating system and processor architecture are you using (go env)?

The Go Playground
https://play.golang.org/p/0oIjit-r3pp

What did you do?

I was trying to use gogstash to parse logs, and I have some issue parsing time.
I don't have local Go env so I tried the Go Playground and seems like the problem is from Go.
The log I was trying to parse uses "YYYYMMdd-HHmmss-SSS" format for timestamp, so I tried "20060102-150405-999" and "20060102-150405-000" for time format but I got error for both of them.

What did you expect to see?

Time being parsed correctly.

What did you see instead?

parsing time "20180724-101112-111" as "20060102-150405-999": cannot parse "111" as "-999"

[mattn]

Document says

A fractional second is represented by adding a period and zeros to the end of the seconds section of layout string, as in "15:04:05.000" to format a time stamp with millisecond precision.

Similar issue #26002

[agnivade]

That is correct. This is working as intended. Please follow #26002 if you want other separators than a period. Or otherwise, change the code to replace - with ..

package main

import (
	"fmt"
	"time"
)

func main() {
	t, err := time.Parse("20060102-150405.000", "20180724-101112.111")
	fmt.Printf("%v %v\n", t, err)
}

[AlekSi]

See also #6189.