[Issue 23127] @safe inference seems to depend on semantic analysis order

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23127

--- Comment #2 from mhh <maxhaton at gmail.com> ---
Some printf debugging:

Context: popFront
exp: sym/rbtree.d(22):(*this._begin).next()
Data about f:
        next
        sym/rbtree.d(9)
        (null)
        next has type RBNode!(Pair)*()
setUnsafe:  next
setUnsafe: In progress
        sc.flag & compile: not
setUnsafe: sym/rbtree.d(9) popFront
setUnsafe: In progress

FuncDeclaration::semantic3(function 'next', sc = 0x7f7eb91f03d0)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Semantic3 is on next run *after* its first use.

--