comment

rust-lang · Nov 7, 2018 · b891a81 · b891a81
1 parent 9e3f571
commit b891a81
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/librustc_mir/shim.rs b/src/librustc_mir/shim.rs
@@ -222,6 +222,7 @@ fn build_drop_shim<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
     );
 
     if let Some(..) = ty {
+        // The first argument (index 0), but add 1 for the return value.
         let dropee_ptr = Place::Local(Local::new(1+0));
         if tcx.sess.opts.debugging_opts.mir_emit_retag {
             // We use raw ptr operations, better prepare the alias tracking for that