Debug information - The `wasm-bindgen` Guide

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# Debug Information

Currently, debug information in the form of DWARF, is stripped away from the output module. To keep it, use `--keep-debug` with the CLI.

However, currently there are no known environments that support DWARF information with Wasm. You can follow the Debug C/C++ WebAssembly guide to get DWARF support in Chrome. This doesn't just demangle symbols in your stacktraces, but also allows for live debugging in the dev-tools or in external editors have a debugger bridge to Chrome.

The `wasm-bindgen-test-runner` currently generates DWARF debug information for tests by default.