diff -r 336137a359ae Python/Python-ast.c
--- a/Python/Python-ast.c	Fri Mar 11 10:27:14 2011 -0500
+++ b/Python/Python-ast.c	Fri Mar 11 16:33:22 2011 -0500
@@ -3974,7 +3974,7 @@
                 expr_ty target;
                 expr_ty iter;
                 asdl_seq* body;
-                asdl_seq* orelse;
+                asdl_seq* orelse = NULL;
 
                 if (PyObject_HasAttrString(obj, "target")) {
                         int res;
@@ -4036,13 +4036,15 @@
                                 goto failed;
                         }
                         len = PyList_GET_SIZE(tmp);
-                        orelse = asdl_seq_new(len, arena);
-                        if (orelse == NULL) goto failed;
-                        for (i = 0; i < len; i++) {
-                                stmt_ty value;
-                                res = obj2ast_stmt(PyList_GET_ITEM(tmp, i), &value, arena);
-                                if (res != 0) goto failed;
-                                asdl_seq_SET(orelse, i, value);
+                        if (len) {
+                                orelse = asdl_seq_new(len, arena);
+                                if (orelse == NULL) goto failed;
+                                for (i = 0; i < len; i++) {
+                                        stmt_ty value;
+                                        res = obj2ast_stmt(PyList_GET_ITEM(tmp, i), &value, arena);
+                                        if (res != 0) goto failed;
+                                        asdl_seq_SET(orelse, i, value);
+                                }
                         }
                         Py_XDECREF(tmp);
                         tmp = NULL;
@@ -4062,7 +4064,7 @@
         if (isinstance) {
                 expr_ty test;
                 asdl_seq* body;
-                asdl_seq* orelse;
+                asdl_seq* orelse = NULL;
 
                 if (PyObject_HasAttrString(obj, "test")) {
                         int res;
@@ -4112,13 +4114,15 @@
                                 goto failed;
                         }
                         len = PyList_GET_SIZE(tmp);
-                        orelse = asdl_seq_new(len, arena);
-                        if (orelse == NULL) goto failed;
-                        for (i = 0; i < len; i++) {
-                                stmt_ty value;
-                                res = obj2ast_stmt(PyList_GET_ITEM(tmp, i), &value, arena);
-                                if (res != 0) goto failed;
-                                asdl_seq_SET(orelse, i, value);
+                        if (len) {
+                                orelse = asdl_seq_new(len, arena);
+                                if (orelse == NULL) goto failed;
+                                for (i = 0; i < len; i++) {
+                                        stmt_ty value;
+                                        res = obj2ast_stmt(PyList_GET_ITEM(tmp, i), &value, arena);
+                                        if (res != 0) goto failed;
+                                        asdl_seq_SET(orelse, i, value);
+                                }
                         }
                         Py_XDECREF(tmp);
                         tmp = NULL;
@@ -4137,7 +4141,7 @@
         if (isinstance) {
                 expr_ty test;
                 asdl_seq* body;
-                asdl_seq* orelse;
+                asdl_seq* orelse = NULL;
 
                 if (PyObject_HasAttrString(obj, "test")) {
                         int res;
@@ -4187,13 +4191,15 @@
                                 goto failed;
                         }
                         len = PyList_GET_SIZE(tmp);
-                        orelse = asdl_seq_new(len, arena);
-                        if (orelse == NULL) goto failed;
-                        for (i = 0; i < len; i++) {
-                                stmt_ty value;
-                                res = obj2ast_stmt(PyList_GET_ITEM(tmp, i), &value, arena);
-                                if (res != 0) goto failed;
-                                asdl_seq_SET(orelse, i, value);
+                        if (len) {
+                                orelse = asdl_seq_new(len, arena);
+                                if (orelse == NULL) goto failed;
+                                for (i = 0; i < len; i++) {
+                                        stmt_ty value;
+                                        res = obj2ast_stmt(PyList_GET_ITEM(tmp, i), &value, arena);
+                                        if (res != 0) goto failed;
+                                        asdl_seq_SET(orelse, i, value);
+                                }
                         }
                         Py_XDECREF(tmp);
                         tmp = NULL;
@@ -4308,7 +4314,7 @@
         if (isinstance) {
                 asdl_seq* body;
                 asdl_seq* handlers;
-                asdl_seq* orelse;
+                asdl_seq* orelse = NULL;
 
                 if (PyObject_HasAttrString(obj, "body")) {
                         int res;
@@ -4371,13 +4377,15 @@
                                 goto failed;
                         }
                         len = PyList_GET_SIZE(tmp);
-                        orelse = asdl_seq_new(len, arena);
-                        if (orelse == NULL) goto failed;
-                        for (i = 0; i < len; i++) {
-                                stmt_ty value;
-                                res = obj2ast_stmt(PyList_GET_ITEM(tmp, i), &value, arena);
-                                if (res != 0) goto failed;
-                                asdl_seq_SET(orelse, i, value);
+                        if (len) {
+                                orelse = asdl_seq_new(len, arena);
+                                if (orelse == NULL) goto failed;
+                                for (i = 0; i < len; i++) {
+                                        stmt_ty value;
+                                        res = obj2ast_stmt(PyList_GET_ITEM(tmp, i), &value, arena);
+                                        if (res != 0) goto failed;
+                                        asdl_seq_SET(orelse, i, value);
+                                }
                         }
                         Py_XDECREF(tmp);
                         tmp = NULL;
diff -r 336137a359ae Python/compile.c
--- a/Python/compile.c	Fri Mar 11 10:27:14 2011 -0500
+++ b/Python/compile.c	Fri Mar 11 16:33:22 2011 -0500
@@ -1719,8 +1719,8 @@
         VISIT(c, expr, s->v.If.test);
         ADDOP_JABS(c, POP_JUMP_IF_FALSE, next);
         VISIT_SEQ(c, stmt, s->v.If.body);
-        ADDOP_JREL(c, JUMP_FORWARD, end);
         if (s->v.If.orelse) {
+            ADDOP_JREL(c, JUMP_FORWARD, end);
             compiler_use_next_block(c, next);
             VISIT_SEQ(c, stmt, s->v.If.orelse);
         }