Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

cmd/compile: regressed and non-informative error messages when wrong arguments/counts are passed into a function call #48835

odeke-em opened this issue Oct 7, 2021 · 1 comment


Copy link

@odeke-em odeke-em commented Oct 7, 2021

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

GoTip at 6f74ed0 aka Go1.18

Does this issue reproduce with the latest release?


What operating system and processor architecture are you using (go env)? Not Applicable

What did you do?

Ran this program or inlined below

package main

func bar(_ int) {

func baz(_, _ int, _ string) {

func main() {
	baz("a", "b", 10, 20)

What did you expect to see?

./main.go:10:5: not enough arguments in call to bar
	have ()
	want (int)
./main.go:11:5: too many arguments in call to baz
	have (string, string, number, number)
	want (int, int, string)

What did you see instead?

./main.go:10:2: not enough arguments in call to bar
./main.go:11:20: too many arguments in call to baz

This is a regression from Go1.8 and it is unique in the upcoming Go1.18; I understand there have been compiler rewrites but just a count of arguments takes us back to square 0 where we were, yet we had worked on improving the user experience of these messages. I had gotten feedback from users at Gophercon 2016 about how the change that we implemented would improve life for them.

Kindly cc-ing @mdempsky @griesemer

@odeke-em odeke-em added this to the Go1.18 milestone Oct 7, 2021
Copy link

@gopherbot gopherbot commented Oct 7, 2021

Change mentions this issue: cmd/compile/internal/types2: return prescriptive message for mismatch call arguments

@odeke-em odeke-em self-assigned this Oct 7, 2021
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
None yet
Linked pull requests

Successfully merging a pull request may close this issue.

None yet
2 participants