Mixing by-name implicits and inlining results in broken owner chains

[milessabin]

The following,

trait Foo { def next: Foo }

inline implicit def foo(implicit loop: => Foo): Foo = new Foo { def next = loop }

def summon(implicit f: Foo) = ()
summon

crashes the compiler with,

Exception in thread "main" java.lang.AssertionError: assertion failed: failure to
construct path from method next/anonymous class Object with Test1.Foo{...}/value
<local Test1$>/object Test1/package <empty>/package <root> to `this` of
class $_lazy_implicit_$2;
anonymous class Object with Test1.Foo{...} does not have an outer accessor

This is the inlining equivalent of a similar interaction between by-name implicits and macros in scalac and reported and fixed here: scala/scala#7199.

The Dotty fix is quite similar ... PR incoming.