Variable input of type MergePullRequestInput! was provided invalid value

[ryboe]

var m struct {
    MergePullRequest struct {
        PullRequest struct {
            ID githubv4.ID
        }
    } `graphql:"mergePullRequest(input:$input)"`
}
squash := githubv4.PullRequestMergeMethodSquash
input := githubv4.MergePullRequestInput{
    PullRequestID: githubv4.ID(prID),
    MergeMethod:   &squash, // <<<<<<<<<<<<<<<
}

...

err := c.client.Mutate(ctx, &m, input, nil)
fmt.Println(err)

Variable input of type MergePullRequestInput! was provided invalid value

MergeMethod is a *PullRequestMergeMethod. The values for PullRequestMergeMethod are all constants. I passed githubv4.PullRequestMergeMethodSquash the only way I know how, by copying the constant to a variable and then passing a pointer to the variable, but I got the error you see above. Am I doing something wrong?

I double-checked the GitHub settings for this repo and they do allow squash merging.

[dmitshur]

I don't see anything wrong in that snippet. Having to create a local variable when optional fields have constant enum values is unfortunate (and maybe should be improved, in a separate issue), but the way you've done it is fine and should produce expected results.

The problem may be elsewhere. Was there any more detail included in the error message?