Add some debugging to help identify when errors get reported.

rust-lang · Jul 24, 2015 · 4172c82 · 4172c82
1 parent 6b49f4d
commit 4172c82
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Showing 2 changed files with 11 additions and 2 deletions.
diff --git a/src/librustc/middle/expr_use_visitor.rs b/src/librustc/middle/expr_use_visitor.rs
@@ -256,7 +256,10 @@ macro_rules! return_if_err {
     ($inp: expr) => (
         match $inp {
             Ok(v) => v,
-            Err(()) => return
+            Err(()) => {
+                debug!("mc reported err");
+                return
+            }
         }
     )
 }

diff --git a/src/librustc/middle/mem_categorization.rs b/src/librustc/middle/mem_categorization.rs
@@ -367,7 +367,13 @@ impl<'t, 'a,'tcx> MemCategorizationContext<'t, 'a, 'tcx> {
     }
 
     fn expr_ty(&self, expr: &ast::Expr) -> McResult<Ty<'tcx>> {
-        self.typer.node_ty(expr.id)
+        match self.typer.node_ty(expr.id) {
+            Ok(t) => Ok(t),
+            Err(()) => {
+                debug!("expr_ty({:?}) yielded Err", expr);
+                Err(())
+            }
+        }
     }
 
     fn expr_ty_adjusted(&self, expr: &ast::Expr) -> McResult<Ty<'tcx>> {