Rank, 14 days: 12 on the Bun sheet
1 person reported

All time, since Oct 21.

Mapped NoInfer tuple rejected

“The error says Bun mapped every property of the tuple, toString included, instead of its elements. tsc 7.0.2 and tsc 5.9.3 accept the file.”

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I hit this bug: rapsheet.dev/sheets/bun/issues/23972/file
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bun check rejects mapped type over NoInfer tuple that tsc accepts. A tuple assigned to a homomorphic mapped type over NoInfer<[string]> reports TS2322 with 'toString' incompatible, as if every property were mapped.

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Where
bun check
Error text
index.ts(3,14): error TS2322: Type '[string]' is not assignable to type 'Mapped<NoInfer<[string]>>'.
Versions
1.4.3 to 1.4.4. Still reported on the newest version, 1.4.4.
Platforms
macOS
How bad
Breaks a normal workflow.

Not quite your bug?

  1. Bun check reports TS2322 tsc accepts on deeply nested types2 people
  2. Type checking differs from 7.0.21 person
  3. Missing TS2540 for readonly intersection1 person

Original reports2, newest first

  1. bun check rejects a mapped type over NoInfer of a tuple, which tsc 7.0.2 accepts#47705
  2. bun check reports a false TS2322 for a mapped type over NoInfer<[string]>, which tsc 7.0.2 accepts#46429

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