Constructor code broken since npm version 4.3.0-dev.20210408 with --target ESNext #45298
Description
Bug Report
Compiling the code below compiled with the --target ESNext option, an error is thrown.
🕗 Version & Regression Information
- No problem up to
npmversion4.3.0-dev.20210407 - The problem first appears in
npmversion4.3.0-dev.20210408
⏯ Playground Link
Cannot be reproduced in the playground (see #45297)
💻 Code
function writeVal(a: number, b: any): number {
console.log(‘writeVal’, a, b);
return a;
}
class TestClass {
a: number;
public b = writeVal(2, this.z);
constructor(public z: number) {
this.a = writeVal(1, this.z);
}
public c = writeVal(3, this.z);
}🙁 Actual behavior
throws
x.ts:7:33 - error TS2729: Property ‘z’ is used before its initialization.
7 public b = writeVal(2, this.z);
~
x.ts:8:17
8 constructor(public z: number) {
~~~~~~~~~~~~~~~~
‘z’ is declared here.
x.ts:11:33 - error TS2729: Property ‘z’ is used before its initialization.
11 public c = writeVal(3, this.z);
~
x.ts:8:17
8 constructor(public z: number) {
~~~~~~~~~~~~~~~~
‘z’ is declared here.
Found 2 errors.
🙂 Expected behavior
The created javascript file should be
function writeVal(a, b) {
console.log('writeVal', a, b);
return a;
}
class TestClass {
constructor(z) {
this.z = z;
this.b = writeVal(2, this.z);
this.c = writeVal(3, this.z);
this.a = writeVal(1, this.z);
}
}