Turn crash test into a regression test

Author: saethlin

tests/crashes/131342.rs renamed to tests/ui/mir/mir-inlining/ice-issue-131342.rs

@@ -1,4 +1,5 @@
-//@ known-bug: #131342
+//@ build-pass
+//@ compile-flags: -Zmir-opt-level=2 -Zinline-mir
 
 fn main() {
     let mut items = vec![1, 2, 3, 4, 5].into_iter();