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Include symbol maps in CanvasKit and Skwasm builds. #46973
Merged
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This should help with flutter/flutter#122834
Emitting DWARF data or source maps actually significantly changes the size of the build, since some binaryen optimizations must actually be skipped when producing either of those. So we can emit symbol maps for now, which don't affect the size of the actual wasm output. With these, we can at least manually deobfuscate stack traces.