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Author SHA1 Message Date
Richard Smith 05cc09daca Fix cross-package signature mismatches. (#7232) 
Fixes link failures when referencing a symbol involving a fingerprint
from a different package.

Previously we included the `Namespace`'s `import_id` as part of its
fingerprint, which caused local and imported namespaces to get different
fingerprints. We now store the `import_id` on the `NameScope` instead of
on the `Namespace` inst to avoid this problem.

Also, when we reach a package-level `NameScopeId`, consistently
fingerprint it as a (package name, library name) pair. Previously the
fingerprinting depended on whether it was imported or not, as an
imported `NameScopeId` had a parent scope (the current package). We need
to include the library name here so that private entities with the same
name in different libraries have different fingerprints.
 2026-05-21 00:02:29 +00:00
Dana Jansens f8dd4d85bf Do not treat impls in different scopes as redeclarations (#7161) 
An impl in a different scope, with the same parameters, will overlap and
get diagnosed for that later by the [prioritization
rule](https://docs.carbon-lang.dev/docs/design/generics/details.html#prioritization-rule),
if they are not in a match_first block. But they are not considered as
redeclarations.

See [proposal
p5366](https://github.com/carbon-language/carbon-lang/blob/62b94f79322039acc3fc8e175896a64a32df470e/proposals/p5366.md)
for the rule.
 2026-05-04 19:11:51 +00:00
Jon Ross-Perkins 93faac45af Mark mangled enclosed entities (#6809) 
This overlapped a little with `Destroy` work; adding the `:enclosed`
identifier (similar to `:thunk`) just to make it easier to identify. I
believe the TODO still applies.

Assisted-by: Google Antigravity with Gemini 3 Flash
 2026-02-27 19:05:10 +00:00
Roopesh SandRichard Smith 41f47c0e87 Fix crash on generic call to local function (#6671) (#6679) 
## Summary
- Avoid crash in `MangleInverseQualifiedNameScope` by skipping missing
name scopes (local functions have no parent scope).
- Add regression test:
toolchain/lower/testdata/function/generic/local_function.carbon.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
 2026-02-20 22:16:18 +00:00