Index: examples/Kaleidoscope/BuildingAJIT/Chapter1/toy.cpp
===================================================================
--- examples/Kaleidoscope/BuildingAJIT/Chapter1/toy.cpp
+++ examples/Kaleidoscope/BuildingAJIT/Chapter1/toy.cpp
@@ -1092,7 +1092,7 @@
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
Index: examples/Kaleidoscope/BuildingAJIT/Chapter2/toy.cpp
===================================================================
--- examples/Kaleidoscope/BuildingAJIT/Chapter2/toy.cpp
+++ examples/Kaleidoscope/BuildingAJIT/Chapter2/toy.cpp
@@ -1092,7 +1092,7 @@
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
Index: examples/Kaleidoscope/BuildingAJIT/Chapter3/toy.cpp
===================================================================
--- examples/Kaleidoscope/BuildingAJIT/Chapter3/toy.cpp
+++ examples/Kaleidoscope/BuildingAJIT/Chapter3/toy.cpp
@@ -1092,7 +1092,7 @@
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
Index: examples/Kaleidoscope/Chapter6/toy.cpp
===================================================================
--- examples/Kaleidoscope/Chapter6/toy.cpp
+++ examples/Kaleidoscope/Chapter6/toy.cpp
@@ -932,7 +932,7 @@
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
Index: examples/Kaleidoscope/Chapter7/toy.cpp
===================================================================
--- examples/Kaleidoscope/Chapter7/toy.cpp
+++ examples/Kaleidoscope/Chapter7/toy.cpp
@@ -1099,7 +1099,7 @@
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }
 
Index: examples/Kaleidoscope/Chapter8/toy.cpp
===================================================================
--- examples/Kaleidoscope/Chapter8/toy.cpp
+++ examples/Kaleidoscope/Chapter8/toy.cpp
@@ -1097,7 +1097,7 @@
   TheFunction->eraseFromParent();
 
   if (P.isBinaryOp())
-    BinopPrecedence.erase(Proto->getOperatorName());
+    BinopPrecedence.erase(P.getOperatorName());
   return nullptr;
 }