1 files changed, 3 insertions, 1 deletions
diff --git a/array.c b/array.c
index c9b66eb2ed..b58f484fc0 100644
--- a/array.c
+++ b/array.c
@@ -336,7 +336,9 @@ rb_ary_pop(ary)
 {
     rb_ary_modify_check(ary);
     if (RARRAY(ary)->len == 0) return Qnil;
-    if (RARRAY(ary)->len * 10 < RARRAY(ary)->aux.capa && RARRAY(ary)->aux.capa > ARY_DEFAULT_SIZE) {
+    if (!FL_TEST(ary, ELTS_SHARED) &&
+	RARRAY(ary)->len * 10 < RARRAY(ary)->aux.capa &&
+	RARRAY(ary)->aux.capa > ARY_DEFAULT_SIZE) {
 	RARRAY(ary)->aux.capa = RARRAY(ary)->len * 2;
 	REALLOC_N(RARRAY(ary)->ptr, VALUE, RARRAY(ary)->aux.capa);
     }