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Fix for crash on call expression with private identifiers. #42861

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Feb 18, 2021
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Fix for crash on call expression with private identifiers. #42861

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11 changes: 10 additions & 1 deletion src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -21978,7 +21978,16 @@ namespace ts {
const type = getTypeOfDottedName((<PropertyAccessExpression>node).expression, diagnostic);
if (type) {
const name = (<PropertyAccessExpression>node).name;
const prop = getPropertyOfType(type, isPrivateIdentifier(name) ? getSymbolNameForPrivateIdentifier(type.symbol, name.escapedText) : name.escapedText);
let prop: Symbol | undefined;
if (isPrivateIdentifier(name)) {
if (!type.symbol) {
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Hm, I dislike relying on type.symbol, but it seems like we can only guarantee getNodeLinks((<PropertyAccessExpression>node).expression).resolvedSymbol exists for Identifier LHSs, since as getTypeOfDottedName recurs, it doesn't set it on other interesting LHS node kinds, like checkPropertyAccessExpressionOrQualifiedName sometimes does.

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I initially had an isAnyLike check since I discovered the issue on any, but never and unknown also trigger the issue.

return undefined;
}
prop = getPropertyOfType(type, getSymbolNameForPrivateIdentifier(type.symbol, name.escapedText));
}
else {
prop = getPropertyOfType(type, name.escapedText);
}
return prop && getExplicitTypeOfSymbol(prop, diagnostic);
}
return undefined;
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34 changes: 33 additions & 1 deletion tests/baselines/reference/privateNameAndAny.errors.txt
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Original file line number Diff line number Diff line change
@@ -1,14 +1,46 @@
tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts(5,15): error TS2339: Property '#bar' does not exist on type 'any'.
tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts(9,9): error TS2571: Object is of type 'unknown'.
tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts(10,9): error TS2571: Object is of type 'unknown'.
tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts(10,15): error TS2339: Property '#bar' does not exist on type 'any'.
tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts(11,9): error TS2571: Object is of type 'unknown'.
tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts(14,15): error TS2339: Property '#foo' does not exist on type 'never'.
tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts(15,15): error TS2339: Property '#bar' does not exist on type 'never'.
tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts(16,15): error TS2339: Property '#foo' does not exist on type 'never'.


==== tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts (1 errors) ====
==== tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts (8 errors) ====
class A {
#foo = true;
method(thing: any) {
thing.#foo; // OK
thing.#bar; // Error
~~~~
!!! error TS2339: Property '#bar' does not exist on type 'any'.
thing.#foo();
}
methodU(thing: unknown) {
thing.#foo;
~~~~~
!!! error TS2571: Object is of type 'unknown'.
thing.#bar;
~~~~~
!!! error TS2571: Object is of type 'unknown'.
~~~~
!!! error TS2339: Property '#bar' does not exist on type 'any'.
thing.#foo();
~~~~~
!!! error TS2571: Object is of type 'unknown'.
}
methodN(thing: never) {
thing.#foo;
~~~~
!!! error TS2339: Property '#foo' does not exist on type 'never'.
thing.#bar;
~~~~
!!! error TS2339: Property '#bar' does not exist on type 'never'.
thing.#foo();
~~~~
!!! error TS2339: Property '#foo' does not exist on type 'never'.
}
};

23 changes: 23 additions & 0 deletions tests/baselines/reference/privateNameAndAny.js
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Expand Up @@ -4,6 +4,17 @@ class A {
method(thing: any) {
thing.#foo; // OK
thing.#bar; // Error
thing.#foo();
}
methodU(thing: unknown) {
thing.#foo;
thing.#bar;
thing.#foo();
}
methodN(thing: never) {
thing.#foo;
thing.#bar;
thing.#foo();
}
};

Expand All @@ -24,6 +35,18 @@ class A {
method(thing) {
__classPrivateFieldGet(thing, _foo); // OK
thing.; // Error
__classPrivateFieldGet(thing, _foo).call(// Error
thing);
}
methodU(thing) {
__classPrivateFieldGet(thing, _foo);
thing.;
__classPrivateFieldGet(thing, _foo).call(thing);
}
methodN(thing) {
__classPrivateFieldGet(thing, _foo);
thing.;
__classPrivateFieldGet(thing, _foo).call(thing);
}
}
_foo = new WeakMap();
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29 changes: 29 additions & 0 deletions tests/baselines/reference/privateNameAndAny.symbols
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Expand Up @@ -14,6 +14,35 @@ class A {

thing.#bar; // Error
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 2, 11))

thing.#foo();
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 2, 11))
}
methodU(thing: unknown) {
>methodU : Symbol(A.methodU, Decl(privateNameAndAny.ts, 6, 5))
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 7, 12))

thing.#foo;
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 7, 12))

thing.#bar;
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 7, 12))

thing.#foo();
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 7, 12))
}
methodN(thing: never) {
>methodN : Symbol(A.methodN, Decl(privateNameAndAny.ts, 11, 5))
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 12, 12))

thing.#foo;
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 12, 12))

thing.#bar;
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 12, 12))

thing.#foo();
>thing : Symbol(thing, Decl(privateNameAndAny.ts, 12, 12))
}
};

39 changes: 39 additions & 0 deletions tests/baselines/reference/privateNameAndAny.types
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Expand Up @@ -17,6 +17,45 @@ class A {
thing.#bar; // Error
>thing.#bar : any
>thing : any

thing.#foo();
>thing.#foo() : any
>thing.#foo : any
>thing : any
}
methodU(thing: unknown) {
>methodU : (thing: unknown) => void
>thing : unknown

thing.#foo;
>thing.#foo : any
>thing : unknown

thing.#bar;
>thing.#bar : any
>thing : unknown

thing.#foo();
>thing.#foo() : any
>thing.#foo : any
>thing : unknown
}
methodN(thing: never) {
>methodN : (thing: never) => void
>thing : never

thing.#foo;
>thing.#foo : any
>thing : never

thing.#bar;
>thing.#bar : any
>thing : never

thing.#foo();
>thing.#foo() : any
>thing.#foo : any
>thing : never
}
};

11 changes: 11 additions & 0 deletions tests/cases/conformance/classes/members/privateNames/privateNameAndAny.ts
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Expand Up @@ -6,5 +6,16 @@ class A {
method(thing: any) {
thing.#foo; // OK
thing.#bar; // Error
thing.#foo();
}
methodU(thing: unknown) {
thing.#foo;
thing.#bar;
thing.#foo();
}
methodN(thing: never) {
thing.#foo;
thing.#bar;
thing.#foo();
}
};