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[Bug]: extractSourceMap falsely matches on sourceMappingURL inside template literal #15950
Description
System Info
System:
OS: Linux 7.0 Ubuntu 24.04.5 LTS (Noble Numbat)
CPU: (28) x64 13th Gen Intel(R) Core(TM) i7-13850HX
Memory: 35.32 GB / 62.44 GB
Container: Yes
Shell: 5.2.21 - /bin/bash
Binaries:
Node: 22.14.0 - /usr/bin/node
npm: 10.9.2 - /usr/local/bin/npm
pnpm: 10.33.3
Deno: 2.2.10 - /usr/local/bin/deno
Browsers:
Chrome: 154.0.8037.92
npmPackages:
@rspack/cli: catalog: => 2.2.1
@rspack/core: catalog: => 2.2.1
Details
rspack emits warnings like these:
WARNING in ⚠ Failed to parse source map from '<REDACTED>/bazel-out/linux_amd64_gnu-fastbuild/bin/node_modules/.aspect_rules_js/@angular+platform-browser@226932862_1032586265/node_modules/@angular/platform-browser/fesm2022/${resolvedSourceMapUrl}' file: Rspack FS Error: IO error: failed to open file `<REDACTED>/bazel-out/linux_amd64_gnu-fastbuild/bin/node_modules/.aspect_rules_js/@angular+platform-browser@226932862_1032586265/node_modules/@angular/platform-browser/fesm2022/${resolvedSourceMapUrl}`: No such file or directory (os error 2)
because it gets tripped up by this expression in Angular's source code:
https://github.com/angular/angular/blob/73858905a277fe2938efff030a686a61c3a38fab/packages/platform-browser/src/dom/dom_renderer.ts#L156
Reproduce link
No response
Reproduce Steps
We're running rspack through a complex Bazel pipeline in our internal monorepo that isn't easy to reproduce. However, running rspack with extractSourceMap enabled on the Angular code I linked above should reproduce the issue. If that doesn't work or a better minimum reproducibility case is desired, let me know.
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Tiancheng-Xu commentedon Oct 6, 2026
I'd like to work on this. I'll reduce the Angular case to a standalone fixture and add regression coverage that distinguishes template-literal text from actual source-map comments.
chenjiahan commentedon Oct 6, 2026
@Tiancheng-Xu thank you!
Tiancheng-Xu commentedon Oct 6, 2026
I've implemented the source-map comment filtering fix and regression coverage in my fork: https://github.com/Tiancheng-Xu/rspack/tree/fix/source-map-template-literal
The upstream PR is #15969. It's awaiting review and approval for the fork's CI workflows.
jadenPete commentedon Oct 8, 2026
Thank you! I look forward to this being merged.