Minor improvements

Makefile

@@ -470,7 +470,8 @@ quick_check:
 
 Makefile.local:
 	echo "Creating default Makefile.local"
-	which ninja-build >/dev/null && echo "NINJA := ninja-build" >> Makefile.local
+	(which ninja-build >/dev/null && echo "NINJA := ninja-build" >> Makefile.local); true
+	touch Makefile.local
 
 llvm_up:
 	$(CPYTHON) $(TOOLS_DIR)/git_svn_gotorev.py $(LLVM_SRC) $(LLVM_REVISION) ./llvm_patches

from_cpython/Lib/threading.py

@@ -93,6 +93,8 @@ def setprofile(func):
     run() method is called.
 
     """
+    # This would otherwise fail at thread-creation time:
+    assert 0, "threading.setprofile not supported in Pyston yet"
     global _profile_hook
     _profile_hook = func
 
@@ -103,6 +105,8 @@ def settrace(func):
     method is called.
 
     """
+    # This would otherwise fail at thread-creation time:
+    assert 0, "threading.settrace not supported in Pyston yet"
     global _trace_hook
     _trace_hook = func
 

src/runtime/list.cpp

@@ -272,7 +272,8 @@ extern "C" BORROWED(PyObject*) PyList_GetItem(PyObject* op, Py_ssize_t i) noexce
     try {
         return listGetitemUnboxed(static_cast<BoxedList*>(op), i);
     } catch (ExcInfo e) {
-        abort();
+        setCAPIException(e);
+        return NULL;
     }
 }