commit e39b070e3cc70d9d07c6d746c4de7c7b6cda8e66
author David Tolnay <dtolnay@gmail.com> Tue Jan 09 17:57:31 2018 -0800
committer David Tolnay <dtolnay@gmail.com> Tue Jan 09 17:57:31 2018 -0800
tree 549df7f284b37f984500b534de3d41f668fb3c20
parent 42d0bc517efc720ca43ae258eb1863d324faf477

Do not parse lifetime by itself as trait object

src/ty.rs

diff --git a/src/ty.rs b/src/ty.rs
index 1f50969..61b4a4f 100644
--- a/src/ty.rs
+++ b/src/ty.rs
@@ -507,6 +507,15 @@
         }
     }
 
+    fn at_least_one_type(bounds: &Punctuated<TypeParamBound, Token![+]>) -> bool {
+        for bound in bounds {
+            if let TypeParamBound::Trait(_) = *bound {
+                return true;
+            }
+        }
+        false
+    }
+
     impl TypeTraitObject {
         named!(pub without_plus -> Self, call!(Self::parse, false));
 
@@ -522,6 +531,8 @@
                     bounds
                 }}
             ) >>
+            // Just lifetimes like `'a + 'b` is not a TraitObject.
+            cond_reduce!(at_least_one_type(&bounds), epsilon!()) >>
             (TypeTraitObject {
                 dyn_token: dyn_token,
                 bounds: bounds,