| - ^ expected one of `,`, `:`, or `>`
| |
| maybe try to close unmatched angle bracket
+ |
+help: you might have meant to end the type parameters here
+ |
+LL | fn f2<'a>(arg : Box<dyn X< { 1 }> = 32 >>) {}
+ | +
error: aborting due to 2 previous errors