1 files changed, 1 insertions, 0 deletions
diff --git a/array.c b/array.c
index 198f0570f1..4eeae43391 100644
--- a/array.c
+++ b/array.c
@@ -3450,6 +3450,7 @@ rb_ary_sample(int argc, VALUE *argv, VALUE ary)
     }
     rb_scan_args(argc, argv, "1", &nv);
     n = NUM2LONG(nv);
+    if (n < 0) rb_raise(rb_eArgError, "negative sample number");
     ptr = RARRAY_PTR(ary);
     len = RARRAY_LEN(ary);
     if (n > len) n = len;