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[SR-6292] Another useless diagnostic #48842

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NachoSoto opened this issue Nov 4, 2017 · 4 comments
Open

[SR-6292] Another useless diagnostic #48842

NachoSoto opened this issue Nov 4, 2017 · 4 comments
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@xedin
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation type checker Area → compiler: Semantic analysis

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@NachoSoto
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Previous ID SR-6292
Radar rdar://problem/59207087
Original Reporter @NachoSoto
Type Bug
Environment

Swift version 4.0.2 (swiftlang-900.0.69.1 clang-900.0.38)

Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug, DiagnosticsQoI, TypeChecker
Assignee @xedin
Priority Medium

md5: 51cee3000f63e3e1718adfc19cd01d7b

Issue Description:

import Foundation
let x: DispatchTime = DispatchTime.now() + .seconds(2) // works
let x: DispatchTime = DispatchTime.now() + .seconds(0.2) // oops, 0.2 is not an Int
error: repl.swift:3:36: error: cannot convert value of type 'DispatchTime' to expected argument type '_.Stride'
let x: DispatchTime = DispatchTime.now() + .seconds(0.2)
                      ~~~~~~~~~~~~~^~~~~

_.Stride what?
@belkadan
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belkadan commented Nov 6, 2017

cc @xedin, @rudkx

@xedin
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xedin commented Nov 6, 2017

@NachoSoto Thanks for reporting this! We know that diagnostics around contextual types and generics are especially bad currently and I'm working on the direction of trying to change underlying architecture to make it easier to diagnose such cases...

@NachoSoto
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👍

@xedin
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xedin commented Feb 6, 2020

@swift-ci create

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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@xedin xedin

Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself diagnostics QoI Bug: Diagnostics Quality of Implementation type checker Area → compiler: Semantic analysis
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@xedin @NachoSoto @belkadan