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-rw-r--r--src/librustc/middle/subst.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/librustc/middle/subst.rs b/src/librustc/middle/subst.rs
index 9ad2dd499cc..83bb9a351e4 100644
--- a/src/librustc/middle/subst.rs
+++ b/src/librustc/middle/subst.rs
@@ -238,7 +238,7 @@ pub struct SeparateVecsPerParamSpace<T> {
     pub fns: Vec<T>,
 }
 
-impl<T:fmt::Show> fmt::Show for VecPerParamSpace<T> {
+impl<T: fmt::Debug> fmt::Debug for VecPerParamSpace<T> {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         try!(write!(fmt, "VecPerParamSpace {{"));
         for space in ParamSpace::all().iter() {