X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Flibrustdoc%2Fscrape_examples.rs;h=10b6fdf87f41972c414708bfa452b91b8c9fe61e;hb=1e55c31cbbc43a21c93ed5652dc39c267e6557af;hp=3b39e3576e69a39d22f577b29dd3ab4c173feebf;hpb=3e97d9bd972e138b0aaf8fc697cdb8d181f43a1a;p=rust.git

diff --git a/src/librustdoc/scrape_examples.rs b/src/librustdoc/scrape_examples.rs
index 3b39e3576e6..10b6fdf87f4 100644
--- a/src/librustdoc/scrape_examples.rs
+++ b/src/librustdoc/scrape_examples.rs
@@ -142,16 +142,21 @@ fn visit_expr(&mut self, ex: &'tcx hir::Expr<'tcx>) {
             hir::ExprKind::Call(f, _) => {
                 let types = tcx.typeck(ex.hir_id.owner);
 
-                match types.node_type_opt(f.hir_id) {
-                    Some(ty) => (ty, ex.span),
-                    None => {
-                        return;
-                    }
+                if let Some(ty) = types.node_type_opt(f.hir_id) {
+                    (ty, ex.span)
+                } else {
+                    trace!("node_type_opt({}) = None", f.hir_id);
+                    return;
                 }
             }
             hir::ExprKind::MethodCall(_, _, _, span) => {
                 let types = tcx.typeck(ex.hir_id.owner);
-                let def_id = types.type_dependent_def_id(ex.hir_id).unwrap();
+                let def_id = if let Some(def_id) = types.type_dependent_def_id(ex.hir_id) {
+                    def_id
+                } else {
+                    trace!("type_dependent_def_id({}) = None", ex.hir_id);
+                    return;
+                };
                 (tcx.type_of(def_id), span)
             }
             _ => {