incorrect "unused pure expression or super" #16262
Description
Bug report
What is the current behavior?
Code like this,
let _Foo;
class Foo {
static #_ = [_init_foo, _initProto, _Foo, _initClass2] = _applyDecs(this, [[signal, 3, "lorem"], [signal, 0, "foo"]], [reactive]);
foo = (_initProto(this), _init_foo(this, 123));
get lorem() {
return 123;
}
set lorem(v) {
v;
}
static #_2 = _initClass2();
}
let _Bar;
class Bar extends _Foo {
static #_ = [_init_bar, _initProto2, _Bar, _initClass3] = _applyDecs(this, [[signal, 3, "baz"], [signal, 0, "bar"]], [reactive]);
bar = (_initProto2(this), _init_bar(this, 456));
#baz = 789;
get baz() {
return this.#baz;
}
set baz(v) {
this.#baz = v;
}
constructor() {
super();
console.log('Bar');
}
static #_2 = _initClass3();
}turns into code like this,
let _Foo;
class Foo {
static #_ = [_init_foo, _initProto, _Foo, _initClass2] = _applyDecs(this, [[signal, 3, "lorem"], [signal, 0, "foo"]], [reactive]);
foo = (_initProto(this), _init_foo(this, 123));
get lorem() {
return 123;
}
set lorem(v) {
v;
}
static #_2 = _initClass2();
}
let _Bar;
class Bar extends (/* unused pure expression or super */ null && (_Foo)) {
static #_ = [_init_bar, _initProto2, _Bar, _initClass3] = _applyDecs(this, [[signal, 3, "baz"], [signal, 0, "bar"]], [reactive]);
bar = (_initProto2(this), _init_bar(this, 456));
#baz = 789;
get baz() {
return this.#baz;
}
set baz(v) {
this.#baz = v;
}
constructor() {
super();
console.log('Bar');
}
static #_2 = _initClass3();
}and the class fails to run because super() tries to call null.
The input is output from Babel's new Stage 3 decorators. The static #_ initializer runs code that sets up the _Foo variable.
If the current behavior is a bug, please provide the steps to reproduce.
I haven't published a reproduction yet.
What is the expected behavior?
Other relevant information:
webpack: 5.74.0