Backport "Fix undercompilation upon ctor change" to LTS #20994
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**Problem** Scala 3 compiler registers special `zincMangledName` for constructors for the purpose of incremental compilation. Currently the `zincMangledName` contains the package name, which does not match the use site tracking, thereby causing undercompilation during incremental compilation after a ctor change, like adding a parameter. There is an existing scripted test, but coincidentally the test class does NOT include packages, so the test ends up passing. **Solution** This PR reproduces the issue by adding package name to the test. This also fixes the problem by changing the `zincMangedName` to `sym.owner.name ++ ";init;"`. [Cherry-picked 157ed43]
Instead of avoiding fully qualified names, use a different separator in zincMangledName. [Cherry-picked 0f7de67]
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No regressions detected in the community build up to lts-19986. |
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Backports #19911 to the LTS branch.
PR submitted by the release tooling.
[skip ci]