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## Summary - When a string exceeds `WTF::String::MaxLength` (~4GB), `bun.String.createUninitialized()` returns a `.Dead` tag - The C++ layer now properly throws `ERR_STRING_TOO_LONG` when this happens - Updated `String.toJS()` in Zig to return `bun.JSError!jsc.JSValue` instead of just `jsc.JSValue` - Updated ~40 Zig caller files to handle the error with `try` - C++ callers updated with `RETURN_IF_EXCEPTION` checks ## Test plan - [x] `bun bd test test/js/node/buffer.test.js` - 449 tests pass - [x] `bun bd test/js/node/test/parallel/test-buffer-tostring-rangeerror.js` - passes 🤖 Generated with [Claude Code](https://claude.ai/code) --------- Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> Co-authored-by: Claude Bot <claude-bot@bun.sh>