git dg init fails with "runtime error: invalid memory address or nil pointer dereference"

[glenux]

Hello to all,

Summary

Passionate about peer to peer systems, I really wanted to test dgit this morning... but it doesn't seem to work as expected in the documentation : dgit crashes at the very first command with the log below.

I am using dgit under Debian Linux with a x86_64 machine, I compiled dgit myself. I wanted to de-centralize the following repository : https://github.com/glenux/teaching-boilerplate .

You will find below all the details. Tell me if you need anything more to help debugging.

Technical details

Runtime log

$ git dg init
What decentragit username would you like to use? dguser

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xc56ee4]

goroutine 1 [running]:
github.com/quorumcontrol/dgit/tupelo/tree.Find({0x1120938, 0xc00065a080}, 0xc000517100, {0xc000a18500, 0xc00012b030})
        /home/user/src/Contrib/dgit/tupelo/tree/tree.go:58 +0x84
github.com/quorumcontrol/dgit/tupelo/namedtree.(*Generator).Find(0xc00000e3f0, {0x1120938, 0xc00065a080}, {0xc0001fa0a0, 0x0})
        /home/user/src/Contrib/dgit/tupelo/namedtree/namedtree.go:75 +0x5a
github.com/quorumcontrol/dgit/tupelo/usertree.Find({0x1120938, 0xc00065a080}, {0xc0001fa0a0, 0x0}, 0x100000000000000)
        /home/user/src/Contrib/dgit/tupelo/usertree/usertree.go:44 +0x6c
github.com/quorumcontrol/dgit/initializer.(*Initializer).createOrRecoverPrivateKey(0xc00069b9b0, {0x1120938, 0xc00065a080}, {0xc0001fa0a0, 0x6})
        /home/user/src/Contrib/dgit/initializer/initializer.go:307 +0x49
github.com/quorumcontrol/dgit/initializer.(*Initializer).getAuth(0xc00069b9b0, {0x1120938, 0xc00065a080})
        /home/user/src/Contrib/dgit/initializer/initializer.go:192 +0x150
github.com/quorumcontrol/dgit/initializer.(*Initializer).Init(0xc00069b9b0, {0x1120938, 0xc00065a080}, {0x0, 0x0, 0x0})
        /home/user/src/Contrib/dgit/initializer/initializer.go:79 +0x2c
github.com/quorumcontrol/dgit/initializer.Init({0x1120938, 0xc00065a080}, 0xc0004e5a76, {0x18cab80, 0x28a, 0x203000})
        /home/user/src/Contrib/dgit/initializer/initializer.go:72 +0xf3
github.com/quorumcontrol/dgit/cmd.glob..func1(0x17542c0, {0x18cab80, 0x0, 0x0})
        /home/user/src/Contrib/dgit/cmd/init.go:77 +0x2cc
github.com/spf13/cobra.(*Command).execute(0x17542c0, {0x18cab80, 0x0, 0x0})
        /home/user/src/Go/pkg/mod/github.com/spf13/cobra@v0.0.5/command.go:830 +0x5f8
github.com/spf13/cobra.(*Command).ExecuteC(0x1754040)
        /home/user/src/Go/pkg/mod/github.com/spf13/cobra@v0.0.5/command.go:914 +0x2fc
github.com/spf13/cobra.(*Command).Execute(...)
        /home/user/src/Go/pkg/mod/github.com/spf13/cobra@v0.0.5/command.go:864
github.com/quorumcontrol/dgit/cmd.Execute()
        /home/user/src/Contrib/dgit/cmd/root.go:26 +0x2a
main.main()
        /home/user/src/Contrib/dgit/main.go:11 +0x4a

Execution environment

System

$ uname -a
Linux dione 5.15.0-2-amd64 #1 SMP Debian 5.15.5-2 (2021-12-18) x86_64 GNU/Linux

Compiler

$ go version
go version go1.17.5 linux/amd64