Author email of (squash-)merged PRs is merger’s email, not PR author’s email

[TimWolla]

I created a stack of three PRs (master <- 1 <- 2 <- 3) that were all created by myself. All commits in the PRs were also created by myself.

A co-worker approved PRs 1 and 2 and then merged PR 2 using the “Squash and merge Stack” functionality. As expected this resulted in two commits on master, carrying the expected commit message and committer. The author field of the resulting commits however was internally inconsistent:

The real name matches my name (PR author), but the email address matches that of my coworker (PR merger):

commit 01973150e00f7e4e532205a09158597dadc656ee
Author:     Tim Düsterhus <2*redacted*+e*redacted*@users.noreply.github.com>
AuthorDate: 53 minutes ago
Commit:     GitHub <noreply@github.com>
CommitDate: 53 minutes ago

For regular non-stacked PRs, the author information correctly shows my real name + the email address I used for the PR’s commits (my corporate email address, rather than my GitHub default email address).

[jpelgrom]

To add to this, even if only merging the bottom PR of a stack (1 in your example), it now appears to use the merger's email instead of the PR author like a non-stacked PR.

Example for bottom PR of stack merged: home-assistant/android#7189 and home-assistant/android@9bbcd0d - merged shows user jpelgrom, patch shows From: Timothy <jpelgrom@users.noreply.github.com>.
Example of non-stacked PR merged: home-assistant/android#7250 and home-assistant/android@30bc416. - merged shows user TimoPtr, patch shows From: Timothy <6560631+TimoPtr@users.noreply.github.com>.