Fix usage of const in for declarations

We correctly produce a syntax error for a const declaration that is
without an initialize, such as

    const x;

but we have to make an exception if it's part of a for declaration, such
as

    for (const x of [1, 2, 3])

Change-Id: Iab86d73f2edc1f3deaf62f0f43f8b04789696b65
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/qml/compiler/qv4compilerscanfunctions.cpp b/src/qml/compiler/qv4compilerscanfunctions.cpp
index 6ca46fd362..a3bdce05d4 100644
--- a/src/qml/compiler/qv4compilerscanfunctions.cpp
+++ b/src/qml/compiler/qv4compilerscanfunctions.cpp
@@ -306,7 +306,7 @@ bool ScanFunctions::visit(PatternElement *ast)
         checkName(QStringRef(&name), ast->identifierToken);
         if (name == QLatin1String("arguments"))
             _context->usesArgumentsObject = Context::ArgumentsObjectNotUsed;
-        if (ast->scope == VariableScope::Const && !ast->initializer && !ast->destructuringPattern()) {
+        if (ast->scope == VariableScope::Const && !ast->initializer && !ast->isForDeclaration && !ast->destructuringPattern()) {
             _cg->throwSyntaxError(ast->identifierToken, QStringLiteral("Missing initializer in const declaration"));
             return false;
         }