Rework rustdoc const type

src/librustdoc/passes/calculate_doc_coverage.rs

@@ -216,8 +216,8 @@ impl<'a, 'b> fold::DocFolder for CoverageCalculator<'a, 'b> {
                 if let Some(ref tr) = impl_.trait_ {
                     debug!(
                         "impl {:#} for {:#} in {}",
-                        tr.print(&self.ctx.cache),
-                        impl_.for_.print(&self.ctx.cache),
+                        tr.print(&self.ctx.cache, self.ctx.tcx),
+                        impl_.for_.print(&self.ctx.cache, self.ctx.tcx),
                         filename,
                     );
 
@@ -228,7 +228,11 @@ impl<'a, 'b> fold::DocFolder for CoverageCalculator<'a, 'b> {
                     // inherent impls *can* be documented, and those docs show up, but in most
                     // cases it doesn't make sense, as all methods on a type are in one single
                     // impl block
-                    debug!("impl {:#} in {}", impl_.for_.print(&self.ctx.cache), filename);
+                    debug!(
+                        "impl {:#} in {}",
+                        impl_.for_.print(&self.ctx.cache, self.ctx.tcx),
+                        filename
+                    );
                 }
             }
             _ => {