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andy-hanson opened this issue Jan 10, 2016 · 1 comment
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TypeError: Cannot read property 'declarations' of undefined #6428

andy-hanson opened this issue Jan 10, 2016 · 1 comment
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@mhegazy
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Bug A bug in TypeScript Fixed A PR has been merged for this issue
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TypeScript 1.8

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@andy-hanson
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The following code (in file Foo.ts) causes the compiler to crash:

import Foo From './Foo'
export default Foo

(Yes, that's a capitalized From and it tries to export itself.)

The error is:

TypeError: Cannot read property 'declarations' of undefined
    at /home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:13033:58
    at Object.forEach (/home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:98:30)
    at buildVisibleNodeList (/home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:13023:20)
    at Object.collectLinkedAliases (/home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:13019:17)
    at emitExportAssignment (/home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:24594:38)
    at emitNode (/home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:25513:28)
    at emitLines (/home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:24406:17)
    at emitSourceFile (/home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:24558:13)
    at /home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:24242:17
    at Object.forEach (/home/andy/git/TYPESCRIPT/node_modules/typescript/lib/tsc.js:98:30)

Tested on typescript 1.8.0-dev.20160109.
@vladima
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vladima commented Jan 10, 2016

good catch, thanks!
repro without syntax errors (compile with -d)

// a.ts
import Foo = SomeNonExistingName
export {Foo}

@mhegazy mhegazy added the Bug A bug in TypeScript label Jan 11, 2016
@mhegazy mhegazy added this to the TypeScript 1.8 milestone Jan 11, 2016
@mhegazy mhegazy self-assigned this Jan 11, 2016
mhegazy added a commit that referenced this issue Jan 15, 2016
@mhegazy
Fix for #6428
2eb73a0
@mhegazy mhegazy mentioned this issue Jan 15, 2016
Merged
mhegazy added a commit that referenced this issue Jan 15, 2016
@mhegazy
Merge pull request #6494 from Microsoft/addUndefinedCheckToCollectLin…
06b24ce 
…kedAliases

Fix for #6428
@mhegazy mhegazy added the Fixed A PR has been merged for this issue label Jan 15, 2016
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@andy-hanson @mhegazy @vladima