1 files changed, 12 insertions, 0 deletions
diff --git a/src/rt/rust_task.cpp b/src/rt/rust_task.cpp
index 2e6c41a8e79..89570782942 100644
--- a/src/rt/rust_task.cpp
+++ b/src/rt/rust_task.cpp
@@ -404,6 +404,9 @@ rust_task::yield(size_t time_in_us, bool *killed) {
         *killed = true;
     }
 
+    // We're not going to need any extra stack for a while
+    clear_stack_cache();
+
     yield_timer.reset_us(time_in_us);
 
     // Return to the scheduler.
@@ -747,6 +750,15 @@ rust_task::del_stack() {
 }
 
 void
+rust_task::clear_stack_cache() {
+    A(sched, stk != NULL, "Expected to have a stack");
+    if (stk->prev != NULL) {
+        free_stk(this, stk->prev);
+        stk->prev = NULL;
+    }
+}
+
+void
 rust_task::record_stack_limit() {
     // The function prolog compares the amount of stack needed to the end of
     // the stack. As an optimization, when the frame size is less than 256