swiftlang/swift

Redundant error for missing type annotation in computed property

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#87,322 opened on Feb 18, 2026

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compilerdiagnostics qualitygood first issuelet & varswift 6.3type checker

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Description

Description

No response

Reproduction

func foo() {
  var int {}
}

error: computed property must have an explicit type [computed_property_missing_type]
  91 | 
  92 | func foo() {
  93 |   var int {}
     |       `- error: computed property must have an explicit type [computed_property_missing_type]
  94 | }
  95 | 

error: type annotation missing in pattern [cannot_infer_type_for_pattern]
  91 | 
  92 | func foo() {
  93 |   var int {}
     |       `- error: type annotation missing in pattern [cannot_infer_type_for_pattern]
  94 | }
  95 |

Expected behavior

The second error is superfluous.

Environment

Swift version 6.3-dev (fddce85428f14f8)

Additional information

No response

Contributor guide

Research direction
Find where the two diagnostics 'computed property missing type' and 'cannot infer type for pattern' are emitted in the Swift compiler source code, then remove the redundant one.
Tech stack
swift
Domain
developer experience
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Swift
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
90