Error code E0226

More than one explicit lifetime bound was used on a trait object.

Example of erroneous code:

#![allow(unused)] fn main() { trait Foo {} type T<'a, 'b> = dyn Foo + 'a + 'b; // error: Trait object `arg` has two // lifetime bound, 'a and 'b. }

Here T is a trait object with two explicit lifetime bounds, 'a and 'b.

Only a single explicit lifetime bound is permitted on trait objects. To fix this error, consider removing one of the lifetime bounds:

#![allow(unused)] fn main() { trait Foo {} type T<'a> = dyn Foo + 'a; }