Emit the needless_pass_by_ref_mut
lint on self
arguments as well
#12693
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Fixes #12589.
Fixes #9591.
The first commit fixes a bug I uncovered while working on this: sometimes, the mutable borrow "event" happens before the alias one, which makes some argument detected as not used mutably even if they are. The fix was simply to fill the map with the aliases afterwards.
The second commit removes the restriction to not run
self
argument for theneedless_pass_by_ref_mut
lint.changelog: emit the
needless_pass_by_ref_mut
lint onself
arguments as wellr? @Manishearth