log detailed error for rewritten patch failures (#711)

1 files changed, 24 insertions, 2 deletions

diff --git a/src/SMAPI/Framework/RewriteFacades/HarmonyInstanceMethods.cs b/src/SMAPI/Framework/RewriteFacades/HarmonyInstanceMethods.cs
index 0f906f51..bca76981 100644
--- a/src/SMAPI/Framework/RewriteFacades/HarmonyInstanceMethods.cs
+++ b/src/SMAPI/Framework/RewriteFacades/HarmonyInstanceMethods.cs
@@ -1,3 +1,5 @@
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
 using System.Reflection.Emit;
@@ -24,10 +26,30 @@ namespace StardewModdingAPI.Framework.RewriteFacades
             return new Harmony(id);
         }
 
+        /// <summary>Apply one or more patches to a method.</summary>
+        /// <param name="original">The original method.</param>
+        /// <param name="prefix">The prefix to apply.</param>
+        /// <param name="postfix">The postfix to apply.</param>
+        /// <param name="transpiler">The transpiler to apply.</param>
         public DynamicMethod Patch(MethodBase original, HarmonyMethod prefix = null, HarmonyMethod postfix = null, HarmonyMethod transpiler = null)
         {
-            MethodInfo method = base.Patch(original: original, prefix: prefix, postfix: postfix, transpiler: transpiler);
-            return new DynamicMethod(method.Name, method.Attributes, method.CallingConvention, method.ReturnType, method.GetParameters().Select(p => p.ParameterType).ToArray(), method.Module, true);
+            try
+            {
+                MethodInfo method = base.Patch(original: original, prefix: prefix, postfix: postfix, transpiler: transpiler);
+                return new DynamicMethod(method.Name, method.Attributes, method.CallingConvention, method.ReturnType, method.GetParameters().Select(p => p.ParameterType).ToArray(), method.Module, true);
+            }
+            catch (Exception ex)
+            {
+                var patchTypes = new List<string>();
+                if (prefix != null)
+                    patchTypes.Add("prefix");
+                if (postfix != null)
+                    patchTypes.Add("postfix");
+                if (transpiler != null)
+                    patchTypes.Add("transpiler");
+
+                throw new Exception($"Failed applying {string.Join("/", patchTypes)} to method {original.DeclaringType?.FullName}.{original.Name}", ex);
+            }
         }
     }
 }