Do not convert foreign exceptions.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/foreign/TruffleObjectBuiltins.java

@@ -53,7 +53,6 @@
 import static com.oracle.graal.python.nodes.SpecialMethodNames.__TRUEDIV__;
 import static com.oracle.graal.python.runtime.exception.PythonErrorType.AttributeError;
 import static com.oracle.graal.python.runtime.exception.PythonErrorType.MemoryError;
-import static com.oracle.graal.python.runtime.exception.PythonErrorType.RuntimeError;
 
 import java.util.Arrays;
 import java.util.List;
@@ -810,9 +809,6 @@ protected Object doInteropCall(TruffleObject callee, Object[] arguments, @Suppre
                 }
             } catch (ArityException | UnsupportedTypeException | UnsupportedMessageException e) {
                 throw raise(PythonErrorType.TypeError, "invalid invocation of foreign callable %s()", callee);
-            } catch (RuntimeException e) {
-                // wrap any other runtime exception into a PException
-                throw raise(RuntimeError, "unexpected exception occurred when calling foreign object %s: %s", callee, e);
             }
         }
 

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/call/PythonCallNode.java

@@ -25,8 +25,6 @@
  */
 package com.oracle.graal.python.nodes.call;
 
-import static com.oracle.graal.python.runtime.exception.PythonErrorType.RuntimeError;
-
 import com.oracle.graal.python.builtins.objects.function.PKeyword;
 import com.oracle.graal.python.nodes.BuiltinNames;
 import com.oracle.graal.python.nodes.PNode;
@@ -141,9 +139,6 @@ Object call(ForeignInvoke callable, Object[] arguments, PKeyword[] keywords,
             // the interop contract is to revert to READ and then EXECUTE
             Object member = getAttrNode.executeObject(callable.receiver, callable.identifier);
             return callNode.execute(member, arguments, keywords);
-        } catch (RuntimeException e) {
-            // convert any other runtime exception to Python RuntimeError
-            throw raise(RuntimeError, "unexpected exception occurred when calling foreign object %s: %s", callable, e);
         }
     }