From c96b760c472a134c59deb20c27e5252319c74e2b Mon Sep 17 00:00:00 2001
From: Leonardo Alt <leo@ethereum.org>
Date: Thu, 17 Jan 2019 13:36:06 +0100
Subject: Return TypeError is fixed point encoding is attempted.

---
 Changelog.md                         |  1 +
 libsolidity/analysis/TypeChecker.cpp | 11 ++++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/Changelog.md b/Changelog.md
index 7668daa6..a0438b53 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -8,6 +8,7 @@ Compiler Features:
 
 
 Bugfixes:
+ * TypeChecker: Return type error if fixed point encoding is attempted instead of throwing ``UnimplementedFeatureError``.
  * Yul: Check that arguments to ``dataoffset`` and ``datasize`` are literals at parse time and properly take this into account in the optimizer.
  * Yul: Parse number literals for detecting duplicate switch cases.
  * Yul: Require switch cases to have the same type.
diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp
index 507a2c94..3d671a71 100644
--- a/libsolidity/analysis/TypeChecker.cpp
+++ b/libsolidity/analysis/TypeChecker.cpp
@@ -1482,7 +1482,16 @@ void TypeChecker::typeCheckABIEncodeFunctions(
 
 		if (argType->category() == Type::Category::RationalNumber)
 		{
-			if (!argType->mobileType())
+			auto const& rationalType = dynamic_cast<RationalNumberType const&>(*argType);
+			if (rationalType.isFractional())
+			{
+				m_errorReporter.typeError(
+					arguments[i]->location(),
+					"Fixed point numbers cannot yet be encoded."
+				);
+				continue;
+			}
+			else if (!argType->mobileType())
 			{
 				m_errorReporter.typeError(
 					arguments[i]->location(),
-- 
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