Missing implied bound raises misleading error message about rust HOT 3 OPEN

   Compiling playground v0.0.1 (/playground)
error[E0309]: the parameter type `T` may not live long enough
 --> src/lib.rs:7:21
  |
3 | impl<'a, T> Foo<'a, T> {
  |      -- the parameter type `T` must be valid for the lifetime `'a` as defined here...
...
7 |         let a = [0; Self::X];
  |                     ^^^^^^^ ...so that the type `T` will meet its required lifetime bounds
  |
help: consider adding an explicit lifetime bound
  |
3 | impl<'a, T: 'a> Foo<'a, T> {
  |           ++++

For more information about this error, try `rustc --explain E0309`.
error: could not compile `playground` (lib) due to 1 previous error