diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 13db690aa4a..85618a0986e 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -24655,7 +24655,6 @@ namespace ts {
                 case SyntaxKind.ConstructorType:
                 case SyntaxKind.CallSignature:
                 case SyntaxKind.ConstructSignature:
-                    return checkSignatureDeclaration(<SignatureDeclaration>node);
                 case SyntaxKind.IndexSignature:
                     return checkSignatureDeclaration(<SignatureDeclaration>node);
                 case SyntaxKind.MethodDeclaration:
@@ -24775,8 +24774,6 @@ namespace ts {
                 case SyntaxKind.ExportAssignment:
                     return checkExportAssignment(<ExportAssignment>node);
                 case SyntaxKind.EmptyStatement:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
                 case SyntaxKind.DebuggerStatement:
                     checkGrammarStatementInAmbientContext(node);
                     return;
diff --git a/src/compiler/moduleNameResolver.ts b/src/compiler/moduleNameResolver.ts
index a203b2bfaba..c8845e7ad35 100644
--- a/src/compiler/moduleNameResolver.ts
+++ b/src/compiler/moduleNameResolver.ts
@@ -1034,7 +1034,7 @@ namespace ts {
         const onlyRecordFailures = !directoryProbablyExists(getDirectoryPath(file), state.host);
         const fromFile = tryFile(file, failedLookupLocations, onlyRecordFailures, state);
         if (fromFile) {
-            const resolved = fromFile && resolvedIfExtensionMatches(extensions, fromFile);
+            const resolved = resolvedIfExtensionMatches(extensions, fromFile);
             if (resolved) {
                 return resolved;
             }