Do not check co_cell2arg if a free var.

ericsnowcurrently · ericsnowcurrently · commit 5107da7c190a · 2021-06-08T10:46:44.000-06:00
diff --git a/Objects/frameobject.c b/Objects/frameobject.c
@@ -1092,7 +1092,8 @@ PyFrame_LocalsToFast(PyFrameObject *f, int clear)
         }
         PyObject *oldvalue = fast[i];
         int cellargoffset = CO_CELL_NOT_AN_ARG;
-        if (co->co_cell2arg != NULL) {
+        if (kind & CO_FAST_CELL && co->co_cell2arg != NULL) {
+            assert(i >= co->co_nlocals);
             cellargoffset = co->co_cell2arg[i - co->co_nlocals];
         }
         PyObject *cell = NULL;

Original file line number	Diff line number	Diff line change
`@@ -1092,7 +1092,8 @@ PyFrame_LocalsToFast(PyFrameObject *f, int clear)`
`1092`	`1092`	`}`
`1093`	`1093`	`PyObject *oldvalue = fast[i];`
`1094`	`1094`	`int cellargoffset = CO_CELL_NOT_AN_ARG;`
`1095`		`- if (co->co_cell2arg != NULL) {`
	`1095`	`+ if (kind & CO_FAST_CELL && co->co_cell2arg != NULL) {`
	`1096`	`+ assert(i >= co->co_nlocals);`
`1096`	`1097`	`cellargoffset = co->co_cell2arg[i - co->co_nlocals];`
`1097`	`1098`	`}`
`1098`	`1099`	`PyObject *cell = NULL;`