use modern everywhere

src/librustc/hir/lowering.rs

@@ -136,6 +136,9 @@ pub struct LoweringContext<'a> {
     /// When `is_collectin_in_band_lifetimes` is true, each lifetime is checked
     /// against this list to see if it is already in-scope, or if a definition
     /// needs to be created for it.
+    ///
+    /// We always store a `modern()` version of the param-name in this
+    /// vector.
     in_scope_lifetimes: Vec<ParamName>,
 
     current_module: NodeId,

src/librustc/hir/lowering/item.rs

@@ -123,7 +123,7 @@ impl LoweringContext<'_> {
             _ => &[],
         };
         let lt_def_names = parent_generics.iter().filter_map(|param| match param.kind {
-            hir::GenericParamKind::Lifetime { .. } => Some(param.name),
+            hir::GenericParamKind::Lifetime { .. } => Some(param.name.modern()),
             _ => None,
         });
         self.in_scope_lifetimes.extend(lt_def_names);