Update message of TypeError 5172

libsolidity/analysis/DeclarationTypeChecker.cpp

@@ -190,7 +190,7 @@ void DeclarationTypeChecker::endVisit(UserDefinedTypeName const& _typeName)
 		m_errorReporter.fatalTypeError(
 			5172_error,
 			_typeName.location(),
-			"Name has to refer to a struct, enum or contract."
+			"Name has to refer to a user-defined value type, struct, enum or contract."
 		);
 	}
 }

libsolidity/analysis/TypeChecker.cpp

@@ -3982,7 +3982,7 @@ void TypeChecker::endVisit(UsingForDirective const& _usingFor)
 					path->location(),
 					"The function \"" + joinHumanReadable(path->path(), ".") + "\" "+
 					"needs to return exactly one value of type " +
-					functionType->parameterTypesIncludingSelf().front()->humanReadableName() +
+					functionType->parameterTypesIncludingSelf().front()->canonicalName() +
 					" to be used for the operator " +
 					TokenTraits::friendlyName(*operator_) +
 					"."