crash when merging

[xcstream]

• Gogs version (or commit ref): 0.10.18.0313
• Git version: 2.7.4
• Operating system: Ubuntu 16.04
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gogs.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist (usually found in log/gogs.log):

Description

...
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x10 pc=0xb557b6]

goroutine 6734 [running]:
github.com/gogits/gogs/models.(*Repository).getOwner(0x0, 0x16f0600, 0xc420283d60, 0xc4216969c0, 0x36)
/home/vagrant/gopath/src/github.com/gogits/gogs/models/repo.go:273 +0x26
github.com/gogits/gogs/models.(*Repository).mustOwner(0x0, 0x16f0600, 0xc420283d60, 0xc4212703a8)
/home/vagrant/gopath/src/github.com/gogits/gogs/models/repo.go:286 +0x43
github.com/gogits/gogs/models.(*Repository).repoPath(0x0, 0x16f0600, 0xc420283d60, 0x2, 0x2)
/home/vagrant/gopath/src/github.com/gogits/gogs/models/repo.go:415 +0x43
github.com/gogits/gogs/models.(*Repository).RepoPath(0x0, 0x44, 0xc421689d08)
/home/vagrant/gopath/src/github.com/gogits/gogs/models/repo.go:419 +0x43
github.com/gogits/gogs/models.(*PullRequest).PushToBaseRepo(0xc421270380, 0x0, 0x0)
/home/vagrant/gopath/src/github.com/gogits/gogs/models/pull.go:572 +0x152
github.com/gogits/gogs/models.addHeadRepoTasks(0xc4222ffeb0, 0x1, 0x2)
/home/vagrant/gopath/src/github.com/gogits/gogs/models/pull.go:652 +0x165
github.com/gogits/gogs/models.AddTestPullRequestTask(0xc420178600, 0xc, 0xc421945570, 0x7, 0xc42183e500)
/home/vagrant/gopath/src/github.com/gogits/gogs/models/pull.go:698 +0x709
created by github.com/gogits/gogs/models.(*PullRequest).Merge.func1
/home/vagrant/gopath/src/github.com/gogits/gogs/models/pull.go:190 +0xc3

[pgleghorn]

This was reported to me also, with same stack trace (ending in getOwner), though I didn't witness the exact replication steps. Do you know what steps caused it in your case?
I am using 0_11_33 (SQLlite) on Win2012.

[unknwon]

@pgleghorn can you give more info in the form of formal issue report?

[pgleghorn]

Have raised #4883 for my report, thx.