From fd8365df08aafc7ab7cfac5fa916d910343d0eb3 Mon Sep 17 00:00:00 2001
From: Federico Bond <federicobond@gmail.com>
Date: Wed, 14 Jun 2017 00:09:11 -0300
Subject: Forbid trailing commas in named arguments

---
 libsolidity/parsing/Parser.cpp | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

(limited to 'libsolidity')

diff --git a/libsolidity/parsing/Parser.cpp b/libsolidity/parsing/Parser.cpp
index ec27f89b..7c439211 100644
--- a/libsolidity/parsing/Parser.cpp
+++ b/libsolidity/parsing/Parser.cpp
@@ -1328,16 +1328,21 @@ pair<vector<ASTPointer<Expression>>, vector<ASTPointer<ASTString>>> Parser::pars
 	{
 		// call({arg1 : 1, arg2 : 2 })
 		expectToken(Token::LBrace);
+
+		bool first = true;
 		while (m_scanner->currentToken() != Token::RBrace)
 		{
+			if (!first)
+				expectToken(Token::Comma);
+
+			if (m_scanner->currentToken() == Token::RBrace)
+				fatalParserError("Unexpected trailing comma.");
+
 			ret.second.push_back(expectIdentifierToken());
 			expectToken(Token::Colon);
 			ret.first.push_back(parseExpression());
 
-			if (m_scanner->currentToken() == Token::Comma)
-				expectToken(Token::Comma);
-			else
-				break;
+			first = false;
 		}
 		expectToken(Token::RBrace);
 	}
-- 
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