invalid memory address after rename file

[AnuchitO]

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x20 pc=0x1009bfcb4]

goroutine 18 [running]:
github.com/AnuchitO/re/runner.(*Runner).Walk.func1({0x14000169260?, 0x2d?}, {0x0, 0x0}, {0x14000062ea8?, 0x22?})
/go/pkg/mod/github.com/!anuchit!o/re@v0.4.0/runner/runner.go:53 +0xa4
path/filepath.walk({0x14000168f60, 0x22}, {0x100a05f58, 0x14000171d40}, 0x14000062ea8)
/sdk/go/src/path/filepath/path.go:453 +0x180
path/filepath.walk({0x14000020034, 0x1d}, {0x100a05f58, 0x14000171c70}, 0x14000062ea8)
/sdk/go/src/path/filepath/path.go:457 +0x1fc
path/filepath.Walk({0x14000020034, 0x1d}, 0x14000062ea8)
/sdk/go/src/path/filepath/path.go:520 +0x6c
github.com/AnuchitO/re/runner.(*Runner).Walk(0x2faf0800?, {0xc0e4aea25c1d6728, 0xb1ae3da7a0, 0x100a8e640})
/go/pkg/mod/github.com/!anuchit!o/re@v0.4.0/runner/runner.go:42 +0x50
main.run(0x0?, 0x0?, 0x0?)
/go/pkg/mod/github.com/!anuchit!o/re@v0.4.0/re.go:75 +0x114
created by main.main
/go/pkg/mod/github.com/!anuchit!o/re@v0.4.0/re.go:42 +0x2b4