---

yaml
---
r: 191283
b: refs/heads/try
c: 9eed8ea
h: refs/heads/master
i:
  191281: bf815f3
  191279: 728a783
v: v3

Author: dotdash

[refs]

@@ -2,7 +2,7 @@
 refs/heads/master: 809a554fca2d0ebc2ba50077016fe282a4064752
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: c64d671671aea2e44ee7fc6eb00ee75fc30ed7b9
-refs/heads/try: 3a8f989dbb7df27f78874d5afbc579cb420159d2
+refs/heads/try: 9eed8ea644c18e81079be240684b41dd0cf00b02
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596

branches/try/src/librustc_trans/trans/tvec.rs

@@ -410,8 +410,12 @@ pub fn iter_vec_loop<'blk, 'tcx, F>(bcx: Block<'blk, 'tcx>,
     F: FnOnce(Block<'blk, 'tcx>, ValueRef, Ty<'tcx>) -> Block<'blk, 'tcx>,
 {
     let _icx = push_ctxt("tvec::iter_vec_loop");
-    let fcx = bcx.fcx;
 
+    if bcx.unreachable.get() {
+        return bcx;
+    }
+
+    let fcx = bcx.fcx;
     let loop_bcx = fcx.new_temp_block("expr_repeat");
     let next_bcx = fcx.new_temp_block("expr_repeat: next");
 

branches/try/src/test/run-fail/issue-23354-2.rs

@@ -0,0 +1,17 @@
+// Copyright 2015 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.
+
+// error-pattern:panic evaluated
+
+#[allow(unused_variables)]
+fn main() {
+    // This used to trigger an LLVM assertion during compilation
+    let x = [panic!("panic evaluated"); 2];
+}