Let empty arrays being flattened not alloc additional state

ruby · Sep 10, 2019 · 602fe51 · 602fe51
1 parent 91ee958
commit 602fe51
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/array.c b/array.c
@@ -5123,6 +5123,8 @@ flatten(VALUE ary, int level, int *modified)
     st_table *memo;
     st_data_t id;
 
+    if (RARRAY_LEN(ary) == 0) return ary_new(0, 0);
+
     stack = ary_new(0, ARY_DEFAULT_SIZE);
     result = ary_new(0, RARRAY_LEN(ary));
     memo = st_init_numtable();