Remove trailing zeros from the output of BytesUtils::formatBytes

test/libsolidity/util/BytesUtils.cpp

@@ -263,7 +263,7 @@ string BytesUtils::formatBytes(
 		os << formatHexString(_bytes);
 		break;
 	case ABIType::String:
-		os << formatString(_bytes);
+		os << formatString(_bytes, _bytes.size() - countRightPaddedZeros(_bytes));
 		break;
 	case ABIType::Failure:
 		break;
@@ -311,3 +311,12 @@ string BytesUtils::formatBytesRange(
 	return os.str();
 }
 
+size_t BytesUtils::countRightPaddedZeros(bytes const& _bytes)
+{
+	return find_if(
+		_bytes.rbegin(),
+		_bytes.rend(),
+		[](uint8_t b) { return b != '\0'; }
+	) - _bytes.rbegin();
+}
+

test/libsolidity/util/BytesUtils.h

@@ -122,6 +122,10 @@ public:
 		ParameterList const& _parameters,
 		bool _highlight
 	);
+
+	/// Count the number of zeros between the last non-zero byte and the end of
+	/// \param _bytes.
+	static size_t countRightPaddedZeros(bytes const& _bytes);
 };
 
 }