ASSERTION FAILED: "We should only declare a function as a lexically scoped variable...

[WebKit-https.git] / Source / JavaScriptCore / parser / Parser.cpp

diff --git a/Source/JavaScriptCore/parser/Parser.cpp b/Source/JavaScriptCore/parser/Parser.cpp
index 9b45da7..645525b 100644 (file)
--- a/Source/JavaScriptCore/parser/Parser.cpp
+++ b/Source/JavaScriptCore/parser/Parser.cpp
@@ -170,6 +170,14 @@ public:
         : SetForScope<bool>(scope->m_isGenerator, shouldParseAsGenerator) { }
 };
 
+struct DepthManager : private SetForScope<int> {
+public:
+    DepthManager(int* depth)
+        : SetForScope<int>(*depth, *depth)
+    {
+    }
+};
+
 template <typename LexerType>
 Parser<LexerType>::~Parser()
 {
@@ -3319,11 +3327,14 @@ template <class TreeBuilder> TreeStatement Parser<LexerType>::parseExportDeclara
             result = parseClassDeclaration(context, ExportType::Exported);
             break;
 
-        case ASYNC:
+        case ASYNC: {
             next();
             semanticFailIfFalse(match(FUNCTION) && !m_lexer->prevTerminator(), "Expected 'function' keyword following 'async' keyword with no preceding line terminator");
+            DepthManager statementDepth(&m_statementDepth);
+            m_statementDepth = 1;
             result = parseAsyncFunctionDeclaration(context, ExportType::Exported);
             break;
+        }
 
         default:
             failWithMessage("Expected either a declaration or a variable statement");