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TypeError: Cannot read property 'length' of undefined at Object.forEachChild #18301

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TypeError: Cannot read property 'length' of undefined at Object.forEachChild#18301
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sandersn
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BugA bug in TypeScriptA bug in TypeScriptDomain: JSDocRelates to JSDoc parsing and type generationRelates to JSDoc parsing and type generationFixedA PR has been merged for this issueA PR has been merged for this issue
Milestone
TypeScript 2.5.3
@lambda-fairy

Description

@lambda-fairy
lambda-fairy
opened on Sep 7, 2017
Issue body actions

TypeScript Version: 2.5.2 and 2.6.0-dev.20170906 (can reproduce on both versions)

Code

/**
 * @typedef LoadCallback
 * @type {function}
 */
type LoadCallback = void;

Expected behavior: Code compiles successfully.

Actual behavior:
Compiler crashes with the following error:

/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:9921
                for (var _i = 0, _a = node.jsDocPropertyTags; _i < _a.length; _i++) {
                                                                     ^

TypeError: Cannot read property 'length' of undefined
    at Object.forEachChild (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:9921:70)
    at setParentPointers (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:17392:12)
    at /tmp/chris/downloads/node_modules/typescript/lib/tsc.js:17392:64
    at visitNode (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:9533:24)
    at Object.forEachChild (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:9918:25)
    at setParentPointers (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:17392:12)
    at /tmp/chris/downloads/node_modules/typescript/lib/tsc.js:17392:64
    at visitNodes (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:9542:30)
    at Object.forEachChild (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:9891:24)
    at setParentPointers (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:17392:12)
    at bindChildrenWorker (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:15178:25)
    at bindChildren (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:15140:17)
    at bindContainer (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:15122:17)
    at bind (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:16214:21)
    at bindEach (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:15157:21)
    at visitNodes (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:9538:24)
    at Object.forEachChild (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:9707:24)
    at bindEachChild (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:15165:16)
    at bindChildrenWorker (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:15254:21)
    at bindChildren (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:15140:17)
    at bindContainer (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:15093:17)
    at bind (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:16214:21)
    at bindSourceFile (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:14851:17)
    at Object.bindSourceFile (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:14809:9)
    at initializeTypeChecker (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:36496:20)
    at Object.createTypeChecker (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:18543:9)
    at getDiagnosticsProducingTypeChecker (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:56042:93)
    at Object.getGlobalDiagnostics (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:56370:53)
    at compileProgram (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:59092:78)
    at compile (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:59051:26)
    at performCompilation (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:58940:33)
    at Object.executeCommandLine (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:58883:9)
    at Object.<anonymous> (/tmp/chris/downloads/node_modules/typescript/lib/tsc.js:59241:4)
    at Module._compile (module.js:573:30)
    at Object.Module._extensions..js (module.js:584:10)
    at Module.load (module.js:507:32)
    at tryModuleLoad (module.js:470:12)
    at Function.Module._load (module.js:462:3)
    at Module.require (module.js:517:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/tmp/chris/downloads/node_modules/typescript/bin/tsc:2:1)
    at Module._compile (module.js:573:30)
    at Object.Module._extensions..js (module.js:584:10)
    at Module.load (module.js:507:32)
    at tryModuleLoad (module.js:470:12)
    at Function.Module._load (module.js:462:3)
    at Function.Module.runMain (module.js:609:10)
    at startup (bootstrap_node.js:158:16)
    at bootstrap_node.js:598:3
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BugA bug in TypeScriptA bug in TypeScriptDomain: JSDocRelates to JSDoc parsing and type generationRelates to JSDoc parsing and type generationFixedA PR has been merged for this issueA PR has been merged for this issue

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