2 files changed, 14 insertions, 10 deletions
diff --git a/src/lib/_int.rs b/src/lib/_int.rs
index ef1b3b66..dfd2204d 100644
--- a/src/lib/_int.rs
+++ b/src/lib/_int.rs
@@ -17,14 +17,15 @@ fn negative(int x) -> bool { ret x < 0; }
 fn nonpositive(int x) -> bool { ret x <= 0; }
 fn nonnegative(int x) -> bool { ret x >= 0; }
 
-iter range(mutable int lo, int hi) -> int {
-    while (lo < hi) {
-        put lo;
-        lo += 1;
+iter range(int lo, int hi) -> int {
+    let int lo_ = lo;
+    while (lo_ < hi) {
+        put lo_;
+        lo_ += 1;
     }
 }
 
-fn to_str(mutable int n, uint radix) -> str
+fn to_str(int n, uint radix) -> str
 {
     check (0u < radix && radix <= 16u);
     if (n < 0) {
diff --git a/src/lib/_uint.rs b/src/lib/_uint.rs
index 5e8d4b97..f456b733 100644
--- a/src/lib/_uint.rs
+++ b/src/lib/_uint.rs
@@ -12,10 +12,11 @@ fn ne(uint x, uint y) -> bool { ret x != y; }
 fn ge(uint x, uint y) -> bool { ret x >= y; }
 fn gt(uint x, uint y) -> bool { ret x > y; }
 
-iter range(mutable uint lo, uint hi) -> uint {
-    while (lo < hi) {
-        put lo;
-        lo += 1u;
+iter range(uint lo, uint hi) -> uint {
+    auto lo_ = lo;
+    while (lo_ < hi) {
+        put lo_;
+        lo_ += 1u;
     }
 }
 
@@ -32,8 +33,10 @@ fn next_power_of_two(uint n) -> uint {
     ret tmp + 1u;
 }
 
-fn to_str(mutable uint n, uint radix) -> str
+fn to_str(uint num, uint radix) -> str
 {
+    auto n = num;
+
     check (0u < radix && radix <= 16u);
     fn digit(uint n) -> char {
         alt (n) {