Berry report bug fix #106

lib/libesp32/Berry/src/be_func.c

@@ -54,17 +54,22 @@ void be_initupvals(bvm *vm, bclosure *cl)
 void be_upvals_close(bvm *vm, bvalue *level)
 {
     bupval *node = vm->upvalist, *next;
-    while (node && node->value >= level) {
+    bupval **prev = &vm->upvalist;
+    while (node) {
         next = node->u.next;
-        if (!node->refcnt) {
-            be_free(vm, node, sizeof(bupval));
+        if (node->value >= level) {
+            if (!node->refcnt) {
+                be_free(vm, node, sizeof(bupval));
+            } else {
+                node->u.value = *node->value; /* move value to upvalue slot */
+                node->value = &node->u.value;
+            }
+            *prev = next;   /* remove from linked list */
         } else {
-            node->u.value = *node->value; /* move value to upvalue slot */
-            node->value = &node->u.value;
+            prev = &node->u.next;
         }
         node = next;
     }
-    vm->upvalist = node;
 }
 
 void be_release_upvalues(bvm *vm, bclosure *cl)

lib/libesp32/Berry/tests/closure.be

@@ -0,0 +1,13 @@
+#- test for issue #105 -#
+
+l=[]
+def tick()
+  var start=100
+  for i : 1..3
+    l.push(def () return [i, start] end)
+  end
+end
+tick()
+assert(l[0]() == [1, 100])
+assert(l[1]() == [2, 100])
+assert(l[2]() == [3, 100])