gdb/lldb: Trim output of vec/slice/array (testcase)

See #29467

Author: untitaker

src/test/debuginfo/huge-vec.rs

@@ -0,0 +1,33 @@
+// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// min-lldb-version: 310
+// ignore-tidy-linelength
+
+// compile-flags:-g
+
+// gdb-command:set print elements 10
+// gdb-command:run
+// gdb-command:print a
+// gdb-check:$1 = Vec<i32>(len: 200, cap: 200) = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1...}
+
+// === LLDB TESTS ==================================================================================
+
+// lldb-command:run
+// lldb-command:print a
+// lldb-check:[...]$0 = vec![1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, ..]
+
+#![allow(unused_variables)]
+
+fn main() {
+    let a = vec![1; 200];
+
+    () // #break
+}