fix(url): validate name in URLSearchParams.append()#320
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URLSearchParams.append() never checked whether stringifying the name argument succeeded. For a non-stringifiable name (a Symbol, or an object whose toString throws), core::encode_spec_string returns a SpecString with a null data pointer and a pending exception, which append handed straight to the Rust params_append — crashing the process in slice::from_raw_parts (UB in release) instead of throwing. Null-check the encoded name and propagate the pending exception, exactly as delete()/has()/get()/set() already do. Add an integration test. Signed-off-by: Daijiro Wachi <daijiro.wachi@gmail.com>
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URLSearchParams.append() never checked whether stringifying the name argument succeeded. For a non-stringifiable name (a Symbol, or an object whose toString throws), core::encode_spec_string returns a SpecString with a null data pointer and a pending exception, which append handed straight to the Rust params_append — crashing the process in slice::from_raw_parts (UB in release) instead of throwing.
Null-check the encoded name and propagate the pending exception, exactly as delete()/has()/get()/set() already do. Add an integration test.