Shadow file and transform source broken when using parallel type checking #21222

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1. JukkaL

   added

   bugmypy got something wrongmypy got something wrong

   parallel checking

   on Apr 14, 2026
2. ilevkivskyi commented on May 19, 2026

   

   ilevkivskyi

   on May 19, 2026

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   This also affects options.transform_source in essentially the same way (it is silently ignored by the native parser).
3. ilevkivskyi

   changed the title [-]Shadow file broken when using parallel type checking[/-] [+]Shadow file and transform source broken when using parallel type checking[/+] on May 19, 2026
4. ilevkivskyi commented on Sep 16, 2026

   

   ilevkivskyi

   on Sep 16, 2026

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   Btw it looks like shadow files now work, but transform source is still broken with native parser.
5. Dextheking1

   added a commit that references this issue on Sep 20, 2026

   Honor options.transform_source with the native parser

   ...

   This issue will close once commit ba97203 is merged into the 'master' branch.

   ba97203