StackRduino
diff --git a/‎py/vm.c‎
Lines changed: 6 additions & 0 deletions b/‎py/vm.c‎
Lines changed: 6 additions & 0 deletions
@@ -1301,8 +1301,14 @@ unwind_jump:;
                 #else
                 {
                 #endif
+                    #if MICROPY_ENABLE_SCHEDULER
+                    // can only switch threads if the scheduler is unlocked
+                    if (MP_STATE_VM(sched_state) == MP_SCHED_IDLE)
+                    #endif
+                    {
                     MP_THREAD_GIL_EXIT();
                     MP_THREAD_GIL_ENTER();
+                    }
                 }
                 #endif
Original file line number	Diff line number	Diff line change
`@@ -1301,8 +1301,14 @@ unwind_jump:;`
`1301`	`1301`	`#else`
`1302`	`1302`	`{`
`1303`	`1303`	`#endif`
	`1304`	`+ #if MICROPY_ENABLE_SCHEDULER`
	`1305`	`+ // can only switch threads if the scheduler is unlocked`
	`1306`	`+ if (MP_STATE_VM(sched_state) == MP_SCHED_IDLE)`
	`1307`	`+ #endif`
	`1308`	`+ {`
`1304`	`1309`	`MP_THREAD_GIL_EXIT();`
`1305`	`1310`	`MP_THREAD_GIL_ENTER();`
	`1311`	`+ }`
`1306`	`1312`	`}`
`1307`	`1313`	`#endif`
`1308`	`1314`