Migration from CodeCommit including PRs causes runtime error

[tfmm]

Description

When trying to migrate a repository and PRs from codecommit, I consistently get this error:

2025/04/29 15:23:23 ...ices/task/migrate.go:48:func1() [E] PANIC during runMigrateTask[4] by DoerID[6] to RepoID[93] for OwnerID[6]: runtime error: invalid memory address or nil pointer dereference
Stacktrace: /usr/local/go/src/runtime/panic.go:262 (0x47bad8)
/usr/local/go/src/runtime/signal_unix.go:917 (0x47baa8)
/go/src/code.gitea.io/gitea/services/migrations/codecommit.go:194 (0x2733478)
/go/src/code.gitea.io/gitea/modules/migration/retry_downloader.go:174 (0x2170285)
/go/src/code.gitea.io/gitea/modules/migration/retry_downloader.go:37 (0x216f643)
/go/src/code.gitea.io/gitea/modules/migration/retry_downloader.go:173 (0x21701ce)
/go/src/code.gitea.io/gitea/services/migrations/migrate.go:386 (0x275e102)
/go/src/code.gitea.io/gitea/services/migrations/migrate.go:130 (0x275cb44)
/go/src/code.gitea.io/gitea/services/task/migrate.go:123 (0x2a45948)
/go/src/code.gitea.io/gitea/services/task/task.go:34 (0x2a46864)
/go/src/code.gitea.io/gitea/services/task/task.go:52 (0x2a46afa)
/go/src/code.gitea.io/gitea/modules/queue/workerqueue.go:250 (0x1f0d5c1)
/go/src/code.gitea.io/gitea/modules/queue/workergroup.go:103 (0x1f0c32d)
/go/src/code.gitea.io/gitea/modules/queue/workergroup.go:183 (0x1f0bcb8)
/usr/local/go/src/runtime/asm_amd64.s:1700 (0x482060)
2025/04/29 15:23:23 ...ices/task/migrate.go:60:func1() [E] runMigrateTask[4] by DoerID[6] to RepoID[93] for OwnerID[6] failed: PANIC whilst trying to do migrate task: runtime error: invalid memory address or nil pointer dereference

If I deselect the pull request option, the repository migrates, however I need the PRs.

Gitea Version

1.23.7

Can you reproduce the bug on the Gitea demo site?

Yes

Log Gist

No response

Screenshots

No response

Git Version

No response

Operating System

Docker

How are you running Gitea?

Docker

Database

PostgreSQL

[tfmm]

Just tested on the 1.24.0 rc0, same behavior there.

[lunny]

The target.SourceCommit maybe nil which means the head branch maybe deleted.

			Head: base.PullRequestBranch{
				Ref:      strings.TrimPrefix(*target.SourceReference, git_module.BranchPrefix),
				SHA:      *target.SourceCommit,
				RepoName: c.repoName,
			},

[tfmm]

So PRs with the source branch deleted cannot be migrated? Is there a workaround to skip those or something so others can be?

[tfmm]

Also, I just went through the PRs, and all of the source branches still exist.

[lunny]

Also, I just went through the PRs, and all of the source branches still exist.

But the panic was caused by from target.SourceCommit is nil.