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[api-extractor] Upgrade API Extractor's compiler to 5.9.2 #5319
Description
Summary
I'm bundling a set of d.ts files and getting the following error:
Symbol not found for identifier: ...I found this old issue where the same problem was caused by a version mismatch: #1370
I also get this message in the console:
Analysis will use the bundled TypeScript version 5.8.2
*** The target project appears to use TypeScript 5.9.2 which is newer than the bundled compiler engine; consider upgrading API Extractor.I tried using typescriptCompilerFolder pointing to my compiler directory with no luck.
As specified in the docs, since my toolchain uses TS 5.9.2 and the latest version of api-extractor uses 5.8.2, I'm requesting if you can upgrade to TS 5.9.2 because I believe the error I'm getting is related to this version mismatch.
Repro steps
Not sure, but maybe having a Symbol exported in a TS file compiled with the newer compiler version is what's causing the issue.
Standard questions
Please answer these questions to help us investigate your issue more quickly:
| Question | Answer |
|---|---|
@microsoft/api-extractor version? |
7.52.11 |
| Operating system? | Mac |
| API Extractor scenario? | d.ts |
| Would you consider contributing a PR? | Yes |
| TypeScript compiler version? | Mine? 5.9.2 |
Node.js version (node -v)? |
22.14 |
Activity
svallory commentedon Nov 25, 2025
It seems this is a recurring issue. I'm creating a documentation automation tool that uses api-extractor and I don't control the TS version of the end user's project.
Isn't there a way to set the version of
tscvia config (at least within a reasonable range) to avoid these issues?jarikmarwede commentedon Jun 17, 2026
I think this issue can be closed now since the compiler was updated to 5.9.3 in
api-extractor@7.58.0(see changelog). Nicolas Cardelino (@ncardeli)