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test for and fix #6043

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This commit is contained in:
Wesley Wigham
2015-12-10 14:08:50 -08:00
parent 58400ed771
commit 139f10fb44
5 changed files with 35 additions and 1 deletions
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3
src/compiler/checker.ts
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@@ -14310,8 +14310,9 @@ namespace ts {
continue;
}
const { declarations, flags } = exports[id];
let declarationLength = declarations.length;
// ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries. (TS Exceptions: namespaces, function overloads, enums, and interfaces)
if (!(flags & (SymbolFlags.Namespace | SymbolFlags.Interface | SymbolFlags.Enum)) && declarations.length > 1) {
if (!(flags & (SymbolFlags.Namespace | SymbolFlags.Interface | SymbolFlags.Enum)) && (flags & SymbolFlags.TypeAlias ? declarationLength-- : true) && declarationLength > 1) {
const exportedDeclarations: Declaration[] = filter(declarations, isNotOverload);
if (exportedDeclarations.length > 1) {
for (const declaration of exportedDeclarations) {