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Confusing type error message in concat #6594

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#6629
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Confusing type error message in concat#6594
#6629
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BugA bug in TypeScriptDomain: lib.d.tsThe issue relates to the different libraries shipped with TypeScriptFixedA PR has been merged for this issueGood First IssueWell scoped, documented and has the green lightHelp WantedYou can do this
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TypeScript 2.0
@elbarzil

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@elbarzil
elbarzil
opened on Jan 23, 2016

Typechecking this code:

var x: string[] = ["A","B","C"];
x = x.concat([1,2,3])

will throw up with

Argument of type 'number[]' is not assignable to parameter of type 'string'.

This happens even without the x = assignment, and that shows that it would make more sense if the error was either of:

Argument of type 'number' is not assignable to parameter of type 'string'.

or

Argument of type 'number[]' is not assignable to parameter of type 'string[]'.

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    BugA bug in TypeScriptDomain: lib.d.tsThe issue relates to the different libraries shipped with TypeScriptFixedA PR has been merged for this issueGood First IssueWell scoped, documented and has the green lightHelp WantedYou can do this

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