Add deopt to encoding error handlers

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/CodecsModuleBuiltins.java

@@ -128,6 +128,9 @@ public byte[] doRaise(TruffleEncoder encoder, @SuppressWarnings("unused") String
             if (exception instanceof PBaseException) {
                 throw raiseNode.raiseExceptionObject((PBaseException) exception, pythonLanguage);
             } else {
+                // Shouldn't happen unless the user manually replaces the method, which is really
+                // unexpected and shouldn't be permitted at all, but currently it is
+                CompilerDirectives.transferToInterpreterAndInvalidate();
                 throw raiseNode.raise(TypeError, ErrorMessages.SHOULD_HAVE_RETURNED_EXCEPTION, UnicodeEncodeError, exception);
             }
         }
@@ -153,6 +156,9 @@ public byte[] doRaise(TruffleDecoder encoder, @SuppressWarnings("unused") String
             if (exception instanceof PBaseException) {
                 throw raiseNode.raiseExceptionObject((PBaseException) exception, pythonLanguage);
             } else {
+                // Shouldn't happen unless the user manually replaces the method, which is really
+                // unexpected and shouldn't be permitted at all, but currently it is
+                CompilerDirectives.transferToInterpreterAndInvalidate();
                 throw raiseNode.raise(TypeError, ErrorMessages.SHOULD_HAVE_RETURNED_EXCEPTION, UnicodeDecodeError, exception);
             }
         }