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Array Access with strictNullChecks does not include 'undefined' type #14665

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hherman1 opened this issue Mar 15, 2017 · 1 comment
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Array Access with strictNullChecks does not include 'undefined' type #14665

hherman1 opened this issue Mar 15, 2017 · 1 comment
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@hherman1
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TypeScript Version: 2.2.1 / nightly (2.2.0-dev.201xxxxx)

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// A *self-contained* demonstration of the problem follows...
let x:number[] = [1,2,3]
let a = x[-1]

Expected behavior:
a has type number | undefined

Actual behavior:

a has type number
@RyanCavanaugh RyanCavanaugh added the Duplicate An existing issue was already created label Mar 15, 2017
@RyanCavanaugh
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Duplicate #13778, please search before logging new issues

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