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tsc TypeError: Cannot read property 'flags' of undefined #16861
Description
TypeScript Version: 2.4.1
Code
// This is minimal chunk of code
class BaseType<T> {
bar: T
}
class NextType<C extends { someProp: any }, T = C['someProp']> extends BaseType<T> {
}
class Foo extends NextType<Foo> {
someProp: {
test: true
}
}
const foo = new Foo();
foo.bar.testExpected behavior:
Just to compile and run. May be this code violates TypeScript rules, but the actual result is unexpected, anyway
Both atom-typescript and WebStorm EAP consider this code as valid, and even correctly auto-complete "foo.bar.test"
Actual behavior:
$ tsc
/usr/lib/node_modules/typescript/lib/tsc.js:55776
throw e;
^
TypeError: Cannot read property 'flags' of undefined
at Object.getCheckFlags (/usr/lib/node_modules/typescript/lib/tsc.js:7996:22)
at getTargetSymbol (/usr/lib/node_modules/typescript/lib/tsc.js:37957:23)
at checkKindsOfPropertyMemberOverrides (/usr/lib/node_modules/typescript/lib/tsc.js:37975:31)
at checkClassLikeDeclaration (/usr/lib/node_modules/typescript/lib/tsc.js:37915:21)
at checkClassDeclaration (/usr/lib/node_modules/typescript/lib/tsc.js:37858:13)
at checkSourceElement (/usr/lib/node_modules/typescript/lib/tsc.js:38767:28)
at Object.forEach (/usr/lib/node_modules/typescript/lib/tsc.js:298:30)
at checkSourceFileWorker (/usr/lib/node_modules/typescript/lib/tsc.js:38836:20)
at checkSourceFile (/usr/lib/node_modules/typescript/lib/tsc.js:38821:13)
at getDiagnosticsWorker (/usr/lib/node_modules/typescript/lib/tsc.js:38874:17)
Activity
koloboid commentedon Dec 24, 2017
Thank you guys, works like a charm in 2.7.0-dev.20171224