Sometimes `air` panics when ran

[MilkeeyCat]

Sometimes when I run command air I get such an error

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x90 pc=0x527620]

goroutine 40 [running]:
regexp.(*Regexp).doExecute(0xc00032be00?, {0x0?, 0x0?}, {0xc000380050?, 0x7fcd05?, 0xc00032be26?}, {0x0?, 0xc00032be00?}, 0x4d?, 0x0, ...)
        /home/alex/Downloads/go/src/regexp/exec.go:527 +0x80
regexp.(*Regexp).doMatch(...)
        /home/alex/Downloads/go/src/regexp/exec.go:514
regexp.(*Regexp).Match(...)
        /home/alex/Downloads/go/src/regexp/regexp.go:537
github.com/cosmtrek/air/runner.(*Engine).isExcludeRegex(0xc0001d6000?, {0xc00032be00, 0x4d})
        /home/alex/go/pkg/mod/github.com/cosmtrek/[email protected]/runner/util.go:149 +0xcb
github.com/cosmtrek/air/runner.(*Engine).watchPath.func1()
        /home/alex/go/pkg/mod/github.com/cosmtrek/[email protected]/runner/engine.go:257 +0x3d3
created by github.com/cosmtrek/air/runner.(*Engine).watchPath in goroutine 1
        /home/alex/go/pkg/mod/github.com/cosmtrek/[email protected]/runner/engine.go:224 +0x23f

I had version 1.52.0 but the place where the error occurred doesn't seem to be updated since 1.52.0 version

OS: Linux

[cosmtrek]

@MilkeeyCat please provide more details to reproduce it

[MilkeeyCat]

I don't have a way how to reproduce it, it just happens sometimes

[istyf]

This seems to be the same issue as #530 that is reported on an even older version of air. It seems that the compiled regex is nil when it is dereferenced in regexp/exec.go:527, but it isn't immediately obvious what could have caused that when reading through the code higher up in the call stack ... This smells like some sort of memory issue ... (edit: or a race, see PR below)

[xiantang]

should be fixed by https://github.com/air-verse/air/pull/677