---

yaml
---
r: 12869
b: refs/heads/master
c: e546c48
h: refs/heads/master
i:
  12867: 2bbc457
v: v3

Author: brson

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 09b9447eb66662d7dd249605f031f101a6618c96
+refs/heads/master: e546c4820b081dc5dc30634b0b2eb3feed2041aa
 refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
 refs/heads/snap-stage3: 4a81779abd786ff22d71434c6d9a5917ea4cdfff
 refs/heads/try: 2898dcc5d97da9427ac367542382b6239d9c0bbf

trunk/src/rustc/middle/tstate/bitvectors.rs

@@ -80,12 +80,13 @@ fn seq_preconds(fcx: fn_ctxt, pps: [pre_and_post]) -> precond {
     let sz: uint = vec::len(pps);
     let num_vars: uint = num_constraints(fcx.enclosing);
 
-    fn seq_preconds_go(fcx: fn_ctxt, pps: [pre_and_post], first: pre_and_post)
+    fn seq_preconds_go(fcx: fn_ctxt, pps: [pre_and_post],
+                       idx: uint, first: pre_and_post)
        -> precond {
-        let mut pps = pps;
+        let mut idx = idx;
         let mut first = first;
         loop {
-            let sz: uint = vec::len(pps);
+            let sz: uint = vec::len(pps) - idx;
             if sz >= 1u {
                 let second = pps[0];
                 assert (pps_len(second) == num_constraints(fcx.enclosing));
@@ -95,7 +96,7 @@ fn seq_preconds(fcx: fn_ctxt, pps: [pre_and_post]) -> precond {
                 union(next_first, second_pre);
                 let next_first_post = clone(first.postcondition);
                 seq_tritv(next_first_post, second.postcondition);
-                pps = vec::slice(pps, 1u, sz);
+                idx += 1u;
                 first = @{precondition: next_first,
                           postcondition: next_first_post};
             } else { ret first.precondition; }
@@ -105,7 +106,7 @@ fn seq_preconds(fcx: fn_ctxt, pps: [pre_and_post]) -> precond {
     if sz >= 1u {
         let first = pps[0];
         assert (pps_len(first) == num_vars);
-        ret seq_preconds_go(fcx, vec::slice(pps, 1u, sz), first);
+        ret seq_preconds_go(fcx, pps, 1u, first);
     } else { ret true_precond(num_vars); }
 }