fuzzer found crash

[daaku]

Was fuzzing my code which uses the CSS parser, and it found a case where it hangs. The input was:

"\xd0\xfe[\xe7\x82"

The output:

program hanged (timeout 10 seconds)

SIGABRT: abortPC=0x4bf769 m=0 sigcode=0

goroutine 1 [running]:
github.com/tdewolff/parse/v2/buffer.(*Lexer).PeekErr(...)
        /home/naitik/usr/go/pkg/mod/github.com/tdewolff/parse/v2@v2.4.3/buffer/lexer.go:89
github.com/tdewolff/parse/v2/buffer.(*Lexer).Err(...)
        /home/naitik/usr/go/pkg/mod/github.com/tdewolff/parse/v2@v2.4.3/buffer/lexer.go:84
github.com/tdewolff/parse/v2/css.(*Lexer).Next(0xc000106d20, 0xc000000000, 0x0, 0x0, 0x0)
        /home/naitik/usr/go/pkg/mod/github.com/tdewolff/parse/v2@v2.4.3/css/lex.go:242 +0x459 fp=0xc000106bb8 sp=0xc000106b98 pc=0x4bf769
github.com/daaku/cssdalek/internal/cssselector.Parse(0x51ab60, 0xc000182bd0, 0xc000106e98, 0x46cff6, 0x5f100007, 0x15d9d523, 0xa452f4e01bb6)
        /home/naitik/workspace/cssdalek/internal/cssselector/cssselector.go:141 +0x179f fp=0xc000106e60 sp=0xc000106bb8 pc=0x4c77df
github.com/daaku/cssdalek/internal/cssselector.Fuzz(0x7efc536a7000, 0x5, 0x5, 0x3)
        /home/naitik/workspace/cssdalek/internal/cssselector/cssselector.go:191 +0xae fp=0xc000106ea8 sp=0xc000106e60 pc=0x4c817e
go-fuzz-dep.Main(0xc000106f70, 0x1, 0x1)
        go-fuzz-dep/main.go:36 +0x1ad fp=0xc000106f58 sp=0xc000106ea8 pc=0x470ced
main.main()
        github.com/daaku/cssdalek/internal/cssselector/go.fuzz.main/main.go:15 +0x52 fp=0xc000106f88 sp=0xc000106f58 pc=0x4c8332
runtime.main()
        runtime/proc.go:203 +0x1fa fp=0xc000106fe0 sp=0xc000106f88 pc=0x43228a
runtime.goexit()
        runtime/asm_amd64.s:1373 +0x1 fp=0xc000106fe8 sp=0xc000106fe0 pc=0x45c921

[daaku]

Nevermind, issue was in my code.