From 87dd9fd41e4cd9392704b7d3058ecaf41a442dd6 Mon Sep 17 00:00:00 2001
From: Victor Nova <lost@losttech.software>
Date: Sun, 11 Apr 2021 12:58:24 -0700
Subject: [PATCH] added a few debug checks

---
 src/runtime/runtime.cs | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/src/runtime/runtime.cs b/src/runtime/runtime.cs
index 3929494d7..383de3c30 100644
--- a/src/runtime/runtime.cs
+++ b/src/runtime/runtime.cs
@@ -1128,13 +1128,31 @@ internal static int PyObject_Compare(IntPtr value1, IntPtr value2)
         internal static nint PyObject_Hash(IntPtr op) => Delegates.PyObject_Hash(op);
 
 
-        internal static IntPtr PyObject_Repr(IntPtr pointer) => Delegates.PyObject_Repr(pointer);
+        internal static IntPtr PyObject_Repr(IntPtr pointer)
+        {
+            AssertNoErorSet();
 
+            return Delegates.PyObject_Repr(pointer);
+        }
 
         internal static IntPtr PyObject_Str(IntPtr pointer) => Delegates.PyObject_Str(pointer);
 
 
-        internal static IntPtr PyObject_Unicode(IntPtr pointer) => Delegates.PyObject_Unicode(pointer);
+        internal static IntPtr PyObject_Unicode(IntPtr pointer)
+        {
+            AssertNoErorSet();
+
+            return Delegates.PyObject_Unicode(pointer);
+        }
+
+        [Conditional("DEBUG")]
+        internal static void AssertNoErorSet()
+        {
+            if (Exceptions.ErrorOccurred())
+                throw new InvalidOperationException(
+                    "Can't call with exception set",
+                    PythonException.FetchCurrent());
+        }
 
 
         internal static IntPtr PyObject_Dir(IntPtr pointer) => Delegates.PyObject_Dir(pointer);