Validate each tuple literal

3 files changed, 39 insertions, 1 deletions

diff --git a/Changelog.md b/Changelog.md
index ed3cdfea..076df606 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -22,6 +22,7 @@ Bugfixes:
  * Type Checker: Prevent duplicate event declarations.
  * Type Checker: Do not mark event parameters as shadowing state variables.
  * Type Checker: Allow ``gas`` in view functions.
+ * Type Checker: Validate each number literal in tuple expressions even if they are not assigned from.
 
 ### 0.4.17 (2017-09-21)
 
diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp
index c2fba565..054912dd 100644
--- a/libsolidity/analysis/TypeChecker.cpp
+++ b/libsolidity/analysis/TypeChecker.cpp
@@ -1293,6 +1293,12 @@ bool TypeChecker::visit(TupleExpression const& _tuple)
 			{
 				components[i]->accept(*this);
 				types.push_back(type(*components[i]));
+
+				// Note: code generation will visit each of the expression even if they are not assigned from.
+				if (types[i]->category() == Type::Category::RationalNumber)
+					if (!dynamic_cast<RationalNumberType const&>(*types[i]).mobileType())
+						m_errorReporter.fatalTypeError(components[i]->location(), "Invalid rational number.");
+
 				if (_tuple.isInlineArray())
 					solAssert(!!types[i], "Inline array cannot have empty components");
 				if (_tuple.isInlineArray())
diff --git a/test/libsolidity/SolidityNameAndTypeResolution.cpp b/test/libsolidity/SolidityNameAndTypeResolution.cpp
index 2c720d03..e9066c32 100644
--- a/test/libsolidity/SolidityNameAndTypeResolution.cpp
+++ b/test/libsolidity/SolidityNameAndTypeResolution.cpp
@@ -5537,7 +5537,7 @@ BOOST_AUTO_TEST_CASE(invalid_mobile_type)
 				}
 			}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid mobile type.");
+	CHECK_ERROR(text, TypeError, "Invalid rational number.");
 }
 
 BOOST_AUTO_TEST_CASE(warns_msg_value_in_non_payable_public_function)
@@ -7096,6 +7096,37 @@ BOOST_AUTO_TEST_CASE(non_external_fallback)
 	CHECK_ERROR(text, TypeError, "Fallback function must be defined as \"external\".");
 }
 
+BOOST_AUTO_TEST_CASE(invalid_literal_in_tuple)
+{
+	char const* text = R"(
+		contract C {
+			function f() pure public {
+				uint x;
+				(x, ) = (1E111);
+			}
+		}
+	)";
+	CHECK_ERROR(text, TypeError, "Invalid rational number.");
+	text = R"(
+		contract C {
+			function f() pure public {
+				uint x;
+				(x, ) = (1, 1E111);
+			}
+		}
+	)";
+	CHECK_ERROR(text, TypeError, "Invalid rational number.");
+	text = R"(
+		contract C {
+			function f() pure public {
+				uint x;
+				(x, ) = (1E111, 1);
+			}
+		}
+	)";
+	CHECK_ERROR(text, TypeError, "Invalid rational number.");
+}
+
 BOOST_AUTO_TEST_CASE(warn_about_sha3)
 {
 	char const* text = R"(