From faf3bcd72c85774805ae0e84d0458aa3e67b20e4 Mon Sep 17 00:00:00 2001
From: "Felix S. Klock II" <pnkfelix@pnkfx.org>
Date: Fri, 20 Feb 2015 13:10:54 +0100
Subject: Accommodate simple cases of arith-overflow in `rustc` related crates.

---
 src/libsyntax/ext/deriving/encodable.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/libsyntax')

diff --git a/src/libsyntax/ext/deriving/encodable.rs b/src/libsyntax/ext/deriving/encodable.rs
index 94b7d1b4d8c..17687534d75 100644
--- a/src/libsyntax/ext/deriving/encodable.rs
+++ b/src/libsyntax/ext/deriving/encodable.rs
@@ -181,7 +181,6 @@ fn encodable_substructure(cx: &mut ExtCtxt, trait_span: Span,
         Struct(ref fields) => {
             let emit_struct_field = cx.ident_of("emit_struct_field");
             let mut stmts = Vec::new();
-            let last = fields.len() - 1;
             for (i, &FieldInfo {
                     name,
                     ref self_,
@@ -204,6 +203,7 @@ fn encodable_substructure(cx: &mut ExtCtxt, trait_span: Span,
                                                  lambda));
 
                 // last call doesn't need a try!
+                let last = fields.len() - 1;
                 let call = if i != last {
                     cx.expr_try(span, call)
                 } else {
-- 
cgit 1.4.1-3-g733a5