From 5cd2d13075e7c4343ada6ac77d1b051f698f42bc Mon Sep 17 00:00:00 2001
From: TollyH <ptolemyhill@sky.com>
Date: Sun, 2 Jun 2024 13:52:28 +0100
Subject: [PATCH] Fix invalid negative literals not throwing error

---
 Assembler.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Assembler.cs b/Assembler.cs
index 893a86e..1a29a31 100644
--- a/Assembler.cs
+++ b/Assembler.cs
@@ -1423,6 +1423,11 @@ public static byte[] ParseLiteral(string operand, bool allowString, out ulong pa
                 }
                 else
                 {
+                    if (parsedNumber > (ulong)long.MaxValue + 1)
+                    {
+                        throw new OperandException(
+                            string.Format(Strings_Assembler.Error_Literal_Too_Small, long.MinValue, operand));
+                    }
                     parsedNumber = (ulong)-(long)parsedNumber;
                 }
             }