Invalid memory address or nil pointer dereference

[jcloutz]

I'm not sure if this is due to the permissions issue or not but the app will only build on the initial run. When I save a file it crashes immediately.

$ refresh run
Refresh (1.3.2)

refresh-log: 2017/04/04 21:37:21 === Rebuild on: :start: ===
refresh-log: 2017/04/04 21:37:21 === Running: go build -v -i -o tmp/sundial (PID: 36468) ===
github.com/jcloutz/sundial
refresh-log: 2017/04/04 21:37:21 === Building Completed (PID: 36468) (Time: 130.067865ms) ===
refresh-log: 2017/04/04 21:37:21 === fork/exec tmp/sundial: permission denied
 ===
refresh-log: 2017/04/04 21:37:45 === Rebuild on: sundial.go ===
refresh-log: 2017/04/04 21:37:45 === Running: go build -v -i -o tmp/sundial (PID: 36534) ===
github.com/jcloutz/sundial
refresh-log: 2017/04/04 21:37:45 === Building Completed (PID: 36534) (Time: 233.783206ms) ===
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x113aeef]

goroutine 1 [running]:
github.com/markbates/refresh/refresh.(*Manager).runner(0xc4200167d0)
	/Users/jeremyc/develop/GoCode/src/github.com/markbates/refresh/refresh/runner.go:18 +0x12f
github.com/markbates/refresh/refresh.(*Manager).Start(0xc4200167d0, 0x12ff800, 0xc420018600)
	/Users/jeremyc/develop/GoCode/src/github.com/markbates/refresh/refresh/manager.go:72 +0xec
github.com/markbates/refresh/cmd.RunWithContext(0x1215f2b, 0xb, 0x12ff840, 0xc4200145e8)
	/Users/jeremyc/develop/GoCode/src/github.com/markbates/refresh/cmd/run.go:38 +0xe6
github.com/markbates/refresh/cmd.Run(0x1215f2b, 0xb)
	/Users/jeremyc/develop/GoCode/src/github.com/markbates/refresh/cmd/run.go:27 +0x4d
github.com/markbates/refresh/cmd.glob..func3(0x1314e40, 0x1331208, 0x0, 0x0)
	/Users/jeremyc/develop/GoCode/src/github.com/markbates/refresh/cmd/run.go:21 +0x39
github.com/spf13/cobra.(*Command).execute(0x1314e40, 0x1331208, 0x0, 0x0, 0x1314e40, 0x1331208)
	/Users/jeremyc/develop/GoCode/src/github.com/spf13/cobra/command.go:648 +0x231
github.com/spf13/cobra.(*Command).ExecuteC(0x1314c20, 0xc42006e058, 0x0, 0x1316300)
	/Users/jeremyc/develop/GoCode/src/github.com/spf13/cobra/command.go:734 +0x339
github.com/spf13/cobra.(*Command).Execute(0x1314c20, 0x1314c20, 0xc42004bf50)
	/Users/jeremyc/develop/GoCode/src/github.com/spf13/cobra/command.go:693 +0x2b
github.com/markbates/refresh/cmd.Execute()
	/Users/jeremyc/develop/GoCode/src/github.com/markbates/refresh/cmd/root.go:21 +0x31
main.main()
	/Users/jeremyc/develop/GoCode/src/github.com/markbates/refresh/main.go:6 +0x20

[markbates]

If you fix the permissions on the tmp folder does it work for you? I've never seen a permission denied error before for this.

[jcloutz]

So I realized that I think this may be my fault and I wasn't paying attention to the configuration. I have the following folder structure.

| app/
|-- main.go
|-- cmd/
| http/
| sundial.go
| refresh.yml

Full source : https://github.com/jcloutz/sundial

to run it in dev I would run go run app/main.go serve. Can i do that with refresh? This is my config.

app_root: app/
ignored_folders:
- vendor
- logs
- tmp
- bin
included_extensions:
- .go
build_path: tmp/
build_delay: 200ns
binary_name: sundial
command_flags: [serve]
enable_colors: true
log_name: "sundial-log"

[jcloutz]

I'm still getting the same error though, and permissions on tmp is 755 with proper owner/group

[markbates]

Ok, I was able to reproduce this using your app. The problem is you're running refresh run in the root directory. There isn't a main function there, so it's not executable. If you run it inside your app folder then it builds just fine.

[jcloutz]

@markbates thank you! I had a feeling it was user error :)