stacktrace for unimplemented native function can fail

Author: qunaibit

graalpython/com.oracle.graal.python.cext/src/capi.c

@@ -984,11 +984,12 @@ static void print_c_stacktrace() {
 #endif
 
 static void unimplemented(const char* name) {
+    printf("Function not implemented in GraalPy: %s\n", name);
     printf("Native stacktrace:\n");
     print_c_stacktrace();
 }
 
-#define FUNC_NOT_IMPLEMENTED unimplemented(__func__); GraalPyTrufflePrintStacktrace(__func__, "Function not implemented in GraalPy: "); exit(-1);
+#define FUNC_NOT_IMPLEMENTED unimplemented(__func__); GraalPyTrufflePrintStacktrace(); exit(-1);
 
 // {{start CAPI_BUILTINS}}
 #include "capi.gen.c.h"

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/cext/PythonCextContextBuiltins.java

@@ -53,6 +53,7 @@
 import com.oracle.graal.python.builtins.PythonBuiltinClassType;
 import com.oracle.graal.python.builtins.modules.cext.PythonCextBuiltins.CApiBinaryBuiltinNode;
 import com.oracle.graal.python.builtins.modules.cext.PythonCextBuiltins.CApiBuiltin;
+import com.oracle.graal.python.builtins.modules.cext.PythonCextBuiltins.CApiNullaryBuiltinNode;
 import com.oracle.graal.python.builtins.modules.cext.PythonCextBuiltins.CApiTernaryBuiltinNode;
 import com.oracle.graal.python.builtins.objects.PNone;
 import com.oracle.graal.python.builtins.objects.cext.capi.CExtNodes.PRaiseNativeNode;
@@ -71,13 +72,12 @@
 
 public final class PythonCextContextBuiltins {
 
-    @CApiBuiltin(ret = VoidNoReturn, args = {ConstCharPtrAsTruffleString, ConstCharPtrAsTruffleString}, call = Ignored)
-    abstract static class PyTrufflePrintStacktrace extends CApiBinaryBuiltinNode {
+    @CApiBuiltin(ret = VoidNoReturn, args = {}, call = Ignored)
+    abstract static class PyTrufflePrintStacktrace extends CApiNullaryBuiltinNode {
 
         @Specialization
         @TruffleBoundary
-        static Object stacktrace(TruffleString where, TruffleString msg) {
-            System.err.println(msg.toJavaStringUncached() + where.toJavaStringUncached());
+        static Object stacktrace() {
             printPythonLikeStackTrace();
             return 0;
         }