Regression for @which 1..2

[dpsanders]

The .. function is defined, for example, in IntervalArithmetic.jl. On 1.5 this works:

julia> using IntervalArithmetic

julia> @which 1..2
..(a::T, b::S) where {T, S} in IntervalArithmetic at /Users/dpsanders/Dropbox/packages/IntervalArithmetic/src/intervals/intervals.jl:145

whereas on 1.6 it errors:

julia> using IntervalArithmetic

julia> @which 1..2
ERROR: dot expressions are not lowered to a single function call, so @which cannot analyze them. You may want to use Meta.@lower to identify which function call to target.
Stacktrace:
 [1] error(s::String)
   @ Base ./error.jl:33
 [2] top-level scope
   @ REPL[2]:1