no-useless-constructor: Cannot read property 'body' of null #420
Description
This seems to be the same issue as #15.
What code were you trying to parse?
// src/foo.ts
class Foo {
constructor();
constructor(obj: any);
constructor(obj?: any) {
console.log(obj);
}
}This also happens with both examples from the other issue,
declare class Foo {
constructor();
}and
class Foo {
constructor();
}When the ESLint no-useless-constructor rule is disabled, the issue doesn't show.
What did you expect to happen?
ESLint sees the code as correct.
What actually happened?
ESLint gives an error, because the body of some constructors can't be found.
TypeError: Cannot read property 'body' of null
Occurred while linting /home/sebastiaanyn/Projects/Syntek/src/foo.ts:2
at checkForConstructor (/home/sebastiaanyn/Projects/Syntek/node_modules/eslint/lib/rules/no-useless-constructor.js:169:42)
at listeners.(anonymous function).forEach.listener (/home/sebastiaanyn/Projects/Syntek/node_modules/eslint/lib/util/safe-emitter.js:45:58)
at Array.forEach (<anonymous>)
at Object.emit (/home/sebastiaanyn/Projects/Syntek/node_modules/eslint/lib/util/safe-emitter.js:45:38)
at NodeEventGenerator.applySelector (/home/sebastiaanyn/Projects/Syntek/node_modules/eslint/lib/util/node-event-generator.js:251:26)
at NodeEventGenerator.applySelectors (/home/sebastiaanyn/Projects/Syntek/node_modules/eslint/lib/util/node-event-generator.js:280:22)
at NodeEventGenerator.enterNode (/home/sebastiaanyn/Projects/Syntek/node_modules/eslint/lib/util/node-event-generator.js:294:14)
at CodePathAnalyzer.enterNode (/home/sebastiaanyn/Projects/Syntek/node_modules/eslint/lib/code-path-analysis/code-path-analyzer.js:632:23)
at nodeQueue.forEach.traversalInfo (/home/sebastiaanyn/Projects/Syntek/node_modules/eslint/lib/linter.js:752:32)
at Array.forEach (<anonymous>)
Versions
| package | version |
|---|---|
@typescript-eslint/eslint-plugin |
1.6.0 |
@typescript-eslint/parser |
1.6.0 |
TypeScript |
3.4.2 |
ESLint |
5.16.0 |
node |
11.8.0 |
npm |
6.9.0 |