Adding Deref impl affects lifetime bounds of other methods

[frewsxcv]

From https://users.rust-lang.org/t/does-implementing-deref-affect-the-lifetime-bounds-of-all-other-methods/

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Code: http://is.gd/AkyE699 http://is.gd/AkyE69

If the Deref is removed, the code compiles. Presumably, the inclusion of the Deref implementation on the trait object causes the lifetime bounds to change on the do_something method.

[Stebalien]

Code: http://is.gd/AkyE69

[bluss]

For debugging, notice that impl Deref for MyTrait is equivalent to impl Deref for MyTrait + 'static.

[steveklabnik]

Triage: still reproduces today.

[frewsxcv]

Triage: still reproduces today.

[pnkfelix]

This no longer reproduces. Tagging as E-needstest