diff --git a/libsolidity/analysis/ReferencesResolver.cpp b/libsolidity/analysis/ReferencesResolver.cpp
index f22c95cc1..d8030b97f 100644
--- a/libsolidity/analysis/ReferencesResolver.cpp
+++ b/libsolidity/analysis/ReferencesResolver.cpp
@@ -150,7 +150,7 @@ void ReferencesResolver::endVisit(ArrayTypeName const& _typeName)
 			ConstantEvaluator e(*length, m_errorReporter);
 		auto const* lengthType = dynamic_cast<RationalNumberType const*>(length->annotation().type.get());
 		if (!lengthType || !lengthType->mobileType())
-			fatalTypeError(length->location(), "Invalid array length, expected integer literal.");
+			fatalTypeError(length->location(), "Invalid array length, expected integer literal or constant expression.");
 		else if (lengthType->isFractional())
 			fatalTypeError(length->location(), "Array with fractional length specified.");
 		else if (lengthType->isNegative())
diff --git a/libsolidity/ast/Types.h b/libsolidity/ast/Types.h
index 635279abe..a54e4e099 100644
--- a/libsolidity/ast/Types.h
+++ b/libsolidity/ast/Types.h
@@ -257,7 +257,7 @@ public:
 	}
 	virtual u256 literalValue(Literal const*) const
 	{
-		solAssert(false, "Literal value requested for type without literals.");
+		solAssert(false, "Literal value requested for type without literals: " + toString(false));
 	}
 
 	/// @returns a (simpler) type that is encoded in the same way for external function calls.
diff --git a/test/libsolidity/SolidityNameAndTypeResolution.cpp b/test/libsolidity/SolidityNameAndTypeResolution.cpp
index 39dba0dea..d141361fc 100644
--- a/test/libsolidity/SolidityNameAndTypeResolution.cpp
+++ b/test/libsolidity/SolidityNameAndTypeResolution.cpp
@@ -2109,7 +2109,7 @@ BOOST_AUTO_TEST_CASE(array_with_nonconstant_length)
 			function f(uint a) public { uint8[a] x; }
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Identifier must be declared constant.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(array_with_negative_length)
@@ -4398,7 +4398,7 @@ BOOST_AUTO_TEST_CASE(invalid_array_declaration_with_signed_fixed_type)
 			}
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(invalid_array_declaration_with_unsigned_fixed_type)
@@ -4410,7 +4410,7 @@ BOOST_AUTO_TEST_CASE(invalid_array_declaration_with_unsigned_fixed_type)
 			}
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(rational_to_bytes_implicit_conversion)
@@ -7254,7 +7254,7 @@ BOOST_AUTO_TEST_CASE(array_length_too_large)
 			uint[8**90] ids;
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(array_length_not_convertible_to_integer)
@@ -7264,7 +7264,7 @@ BOOST_AUTO_TEST_CASE(array_length_not_convertible_to_integer)
 			uint[true] ids;
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(array_length_constant_var)
@@ -7286,7 +7286,7 @@ BOOST_AUTO_TEST_CASE(array_length_non_integer_constant_var)
 			uint[LEN] ids;
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(array_length_cannot_be_function)
@@ -7297,7 +7297,7 @@ BOOST_AUTO_TEST_CASE(array_length_cannot_be_function)
 			uint[f] ids;
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(array_length_can_be_recursive_constant)
@@ -7321,7 +7321,7 @@ BOOST_AUTO_TEST_CASE(array_length_cannot_be_function_call)
 			uint[LEN] ids;
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(array_length_const_cannot_be_fractional)
@@ -7409,7 +7409,7 @@ BOOST_AUTO_TEST_CASE(array_length_with_pure_functions)
 			uint[LEN] ids;
 		}
 	)";
-	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal.");
+	CHECK_ERROR(text, TypeError, "Invalid array length, expected integer literal or constant expression.");
 }
 
 BOOST_AUTO_TEST_CASE(array_length_invalid_expression)