💅 lint/suspicious/noRedeclare false positive when using inline type signature on const with [key in MyMapPb[keyof MyMapPb]]

[valters]

Environment information

We have a pattern of mapping enums to-from one system to another with the nice in ... keyof pattern. Biome considers these placeholder key syntax a variable redeclaration.
Like this:

export const MyMappingPbToGql: {
  [key in MyStatusMapPb[keyof MyStatusMapPb]]: StatusGql;
} = {
  [MyStatusPb.STATUS_INVALID]: StatusGql.Invalid,
  [MyStatusPb.STATUS_A]: StatusGql.A,
  [MyStatusPb.STATUS_B]: StatusGql.B,
  [MyStatusPb.STATUS_C]: StatusGql.C,
};

However when I have several of these enum to enum mappings, Biome complains.

Please see the code snippet in playground.

Biome shows error Shouldn't redeclare 'key'. Consider to delete it or rename it. But this is not correct. As far as I can tell whatever that 'key' signifies is not a reachable part of syntax.

Rule name

lint/suspicious/noRedeclare

Playground link

https://biomejs.dev/playground/?code=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%3D

Expected result

Linter should not complain about key being declared or redeclared. something in Map[keyof Map] in type signature is a special syntax and actually does not declare (or redeclare) anything.

Code of Conduct

• I agree to follow Biome's Code of Conduct