Here is a simple reproducer in Rust:
fn main() {
let allocator = oxc_allocator::Allocator::default();
let source_type = oxc_span::SourceType::default();
let _ = oxc_parser::Parser::new(&allocator, "class extends,{", source_type).parse();
}The specific minimised repro input:
When compiled and run in debug mode (or with debug assertions enabled), it gives this error:
thread 'main' (500479) panicked at ~/oxc/crates/oxc_span/src/span.rs:156:9:
assertion failed: self.start <= self.end
and the callstack for it:
3: <oxc_span::span::Span>::size
at ~/oxc/crates/oxc_span/src/span.rs:156:9
4: <miette::protocol::SourceSpan as core::convert::From<oxc_span::span::Span>>::from
at ~/oxc/crates/oxc_span/src/span.rs:566:63
5: <oxc_span::span::Span as core::convert::Into<miette::protocol::SourceSpan>>::into
at ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/convert/mod.rs:779:9
6: <miette::protocol::LabeledSpan>::new_with_span::<oxc_span::span::Span>
at ~/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/oxc-miette-2.7.1/src/protocol.rs:290:34
7: <miette::protocol::LabeledSpan>::underline::<oxc_span::span::Span>
at ~/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/oxc-miette-2.7.1/src/protocol.rs:356:9
8: <miette::protocol::LabeledSpan as core::convert::From<oxc_span::span::Span>>::from
at ~/oxc/crates/oxc_span/src/span.rs:572:9
9: <oxc_span::span::Span as core::convert::Into<miette::protocol::LabeledSpan>>::into
at ~/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/convert/mod.rs:779:9
10: <oxc_diagnostics::OxcDiagnostic>::with_label::<oxc_span::span::Span>
at ~/oxc/crates/oxc_diagnostics/src/lib.rs:313:45
11: oxc_parser::diagnostics::classes_can_only_extend_single_class
at ~/oxc/crates/oxc_parser/src/diagnostics.rs:340:10
12: <oxc_parser::ParserImpl<oxc_parser::config::NoTokensParserConfig>>::parse_class
at ~/oxc/crates/oxc_parser/src/js/class.rs:93:28
13: <oxc_parser::ParserImpl<oxc_parser::config::NoTokensParserConfig>>::parse_class_declaration
at ~/oxc/crates/oxc_parser/src/js/class.rs:43:14
14: <oxc_parser::ParserImpl<oxc_parser::config::NoTokensParserConfig>>::parse_class_statement
at ~/oxc/crates/oxc_parser/src/js/class.rs:26:25
15: <oxc_parser::ParserImpl<oxc_parser::config::NoTokensParserConfig>>::parse_statement_list_item
at ~/oxc/crates/oxc_parser/src/js/statement.rs:129:33
16: <oxc_parser::ParserImpl<oxc_parser::config::NoTokensParserConfig>>::parse_directives_and_statements
at ~/oxc/crates/oxc_parser/src/js/statement.rs:70:29
17: <oxc_parser::ParserImpl<oxc_parser::config::NoTokensParserConfig>>::parse_program
at ~/oxc/crates/oxc_parser/src/lib.rs:775:49
18: <oxc_parser::ParserImpl<oxc_parser::config::NoTokensParserConfig>>::parse
at ~/oxc/crates/oxc_parser/src/lib.rs:672:32
19: oxc_parser::parser_parse::parse_with_no_tokens_config
at ~/oxc/crates/oxc_parser/src/lib.rs:487:10
20: <oxc_parser::Parser>::parse
at ~/oxc/crates/oxc_parser/src/lib.rs:349:17
Since this is invalid code as input, it should give some user-facing error, and indeed it does in release mode. The latest oxlint reports:
× Unexpected token
╭─[test.js:1:14]
1 │ class extends,{
· ─
╰────
Tested against c9f506e which is the latest main commit
For some context: this was found with a fuzzer, if that affects triage/priority
Here is a simple reproducer in Rust:
The specific minimised repro input:
When compiled and run in debug mode (or with debug assertions enabled), it gives this error:
and the callstack for it:
Since this is invalid code as input, it should give some user-facing error, and indeed it does in release mode. The latest
oxlintreports:Tested against c9f506e which is the latest
maincommitFor some context: this was found with a fuzzer, if that affects triage/priority