1 files changed, 11 insertions, 4 deletions

diff --git a/pez.c b/pez.c
index 84d24c9..bc68b38 100644
--- a/pez.c
+++ b/pez.c
@@ -475,14 +475,21 @@ delproto(PezContext *cx, Proto *pr)
 }
 
 static void
-closeups(PezContext *cx, Val *vals)
+closeups(PezContext *cx, Val *ptr)
 {
-    for (Upval *up = cx->openup, *next; up; up = next) {
+    for (Upval *up = cx->openup, *prev = NULL, *next; up; up = next) {
         next = up->nextup;
-        if (up->ptr >= vals) {
-            cx->openup = next;
+        if (up->ptr >= ptr) {
+            if (prev) {
+                prev->nextup = next;
+            }
+            if (up == cx->openup) {
+                cx->openup = next;
+            }
             up->slot = *up->ptr;
             up->ptr = &up->slot;
+        } else {
+            prev = up;
         }
     }
 }