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Fix: checkAliasSymbol crash when checking for @deprecated #42971

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merged 2 commits into from
Feb 26, 2021
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Fix: checkAliasSymbol crash when checking for @deprecated #42971

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9f9825a
Fix: checkAliasSymbol crash when checking for @deprecated
sandersn Feb 25, 2021
75449de
Add bug number and accept baselines
sandersn Feb 25, 2021
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2 changes: 1 addition & 1 deletion src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -37124,7 +37124,7 @@ namespace ts {
error(node, Diagnostics.Re_exporting_a_type_when_the_isolatedModules_flag_is_provided_requires_using_export_type);
}

if (isImportSpecifier(node) && every(target.declarations, d => !!(getCombinedNodeFlags(d) & NodeFlags.Deprecated))) {
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Our every helper doesn't handle undefined? Most of our other array helpers treat undefined as an empty array input. Maybe we should change the helper?

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@sandersn sandersn Feb 26, 2021 •
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It does handle undefined, but every(undefined, _) ==> true, and then addDeprecatedSuggestion crashes on the next line.

This fix is shorter than target.declarations && every(target.declarations, ... and uses the standard utility, so I think it's better.

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Pffffff okay. Yeah.

if (isImportSpecifier(node) && target.declarations?.every(d => !!(getCombinedNodeFlags(d) & NodeFlags.Deprecated))) {
addDeprecatedSuggestion(node.name, target.declarations, symbol.escapedName as string);
}
}
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18 changes: 18 additions & 0 deletions tests/baselines/reference/importPropertyFromMappedType.js
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@@ -0,0 +1,18 @@
//// [tests/cases/compiler/importPropertyFromMappedType.ts] ////

//// [errors.d.ts]
// #42957

export = createHttpError;
declare const createHttpError: createHttpError.NamedConstructors;
declare namespace createHttpError {
type NamedConstructors = { [P in 'NotFound']: unknown;}
}

//// [main.ts]
import { NotFound } from './errors'


//// [main.js]
"use strict";
exports.__esModule = true;
23 changes: 23 additions & 0 deletions tests/baselines/reference/importPropertyFromMappedType.symbols
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@@ -0,0 +1,23 @@
=== tests/cases/compiler/errors.d.ts ===
// #42957

export = createHttpError;
>createHttpError : Symbol(createHttpError, Decl(errors.d.ts, 3, 13), Decl(errors.d.ts, 3, 65))

declare const createHttpError: createHttpError.NamedConstructors;
>createHttpError : Symbol(createHttpError, Decl(errors.d.ts, 3, 13), Decl(errors.d.ts, 3, 65))
>createHttpError : Symbol(createHttpError, Decl(errors.d.ts, 3, 13), Decl(errors.d.ts, 3, 65))
>NamedConstructors : Symbol(createHttpError.NamedConstructors, Decl(errors.d.ts, 4, 35))

declare namespace createHttpError {
>createHttpError : Symbol(createHttpError, Decl(errors.d.ts, 3, 13), Decl(errors.d.ts, 3, 65))

type NamedConstructors = { [P in 'NotFound']: unknown;}
>NamedConstructors : Symbol(NamedConstructors, Decl(errors.d.ts, 4, 35))
>P : Symbol(P, Decl(errors.d.ts, 5, 33))
}

=== tests/cases/compiler/main.ts ===
import { NotFound } from './errors'
>NotFound : Symbol(NotFound, Decl(main.ts, 0, 8))

19 changes: 19 additions & 0 deletions tests/baselines/reference/importPropertyFromMappedType.types
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@@ -0,0 +1,19 @@
=== tests/cases/compiler/errors.d.ts ===
// #42957

export = createHttpError;
>createHttpError : createHttpError.NamedConstructors

declare const createHttpError: createHttpError.NamedConstructors;
>createHttpError : createHttpError.NamedConstructors
>createHttpError : any

declare namespace createHttpError {
type NamedConstructors = { [P in 'NotFound']: unknown;}
>NamedConstructors : NamedConstructors
}

=== tests/cases/compiler/main.ts ===
import { NotFound } from './errors'
>NotFound : unknown

11 changes: 11 additions & 0 deletions tests/cases/compiler/importPropertyFromMappedType.ts
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@@ -0,0 +1,11 @@
// #42957

// @filename: errors.d.ts
export = createHttpError;
declare const createHttpError: createHttpError.NamedConstructors;
declare namespace createHttpError {
type NamedConstructors = { [P in 'NotFound']: unknown;}
}

// @filename: main.ts
import { NotFound } from './errors'