Fix bad inherent overlap error

When we examine HIR::ImplBlock's we determine if an impl might overlap
another impl based on the Self type. So for example you might have a
generic structure Foo<T>(T), and an associated impl block for Foo<i32>, but
then go on to define an associated impl of Foo<T> the generic one will
overlap any associated impl hiding the generic implementation.

In this case we have two generic impl blocks

  *const [T]
  *const T

This means the *const T might overlap with the slice one since it is
generic. As bjorn3 pointed out in #1075, the correct implementation is to
observe that [T] is constrained by size but untill we have the auto trait
of Sized we must example the two generic impls and just determine that
they are not-equal so for now this is the best implementation we can do.

Fixes #1075

0 files changed, 0 insertions, 0 deletions