swc_css_parser_memory_leak_example

main.rs

use swc_core::common::{FileName, SourceMap};
use swc_core::common::input::StringInput;
use swc_core::common::sync::Lrc;
use swc_core::css::parser::{parser, lexer};


fn main() {
    let cm = Lrc::<SourceMap>::default();
    let fm = cm.new_source_file(
        FileName::Custom("test.css".into()),
        r#"
       .a {
  :global('.b') {
    color: red;
  }
} 
        "#.into(),
    );

    let config = parser::ParserConfig {
        css_modules: true,
        legacy_ie: true,
        ..Default::default()
    };
    let lexer = lexer::Lexer::new(StringInput::from(&*fm), None, config);
    let mut parser = parser::Parser::new(lexer, config);
    let parse_result = parser.parse_all();

    println!("{:?}", parse_result);
}

change :global('.b') -> :global(.b) , the code will work