`@which` does not work with fully qualified "symbol"

[mauro3]

julia> @which Base.sin
ERROR: ArgumentError: argument is not a generic function
 in methods at reflection.jl:140
 in which at ./reflection.jl:292

expected outcome

julia> @which Base.sin
Base

[mauro3]

Oh, this segfaults now:

               _
   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: http://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.5.0-pre+5610 (2016-07-22 07:51 UTC)
 _/ |\__'_|_|_|\__'_|  |  m3/function_module/58ca87b* (fork: 1 commits, 0 days)
|__/                   |  x86_64-pc-linux-gnu

julia> @which Base.sin

signal (11): Segmentation fault
while loading no file, in expression starting on line 0
jl_f_tuple at /home/mauro/julia/julialang_upstream/src/builtins.c:648
eval_user_input at ./REPL.jl:74
jl_call_method_internal at /home/mauro/julia/julialang_upstream/src/julia_internal.h:177 [inlined]
jl_apply_generic at /home/mauro/julia/julialang_upstream/src/gf.c:2034
macro expansion at ./REPL.jl:92 [inlined]
#3 at ./event.jl:46
jl_call_method_internal at /home/mauro/julia/julialang_upstream/src/julia_internal.h:177 [inlined]
jl_apply_generic at /home/mauro/julia/julialang_upstream/src/gf.c:2034
jl_apply at /home/mauro/julia/julialang_upstream/src/julia.h:1394 [inlined]
start_task at /home/mauro/julia/julialang_upstream/src/task.c:253
unknown function (ip: 0xffffffffffffffff)
Allocations: 1683741 (Pool: 1682795; Big: 946); GC: 0
zsh: segmentation fault (core dumped)  julia5

[tkelman]

related to #15606 ?

[mauro3]

Yes, it looks like it. So presumably, once that is fixed the old error should resurface...

[mauro3]

Now this shows (0.7):

julia> @which Base.sin                                                                                                                                                   
getproperty(x::Module, f::Symbol) in Base at sysimg.jl:14