backtraces broken (probable LLVM-svn/LLDB problem)

[timholy]

I'm getting a test failure on make test-backtrace. More detail:

julia> bt = backtrace()
22-element Array{Ptr{Void},1}:
 Ptr{Void} @0x00007f695d467c85
 Ptr{Void} @0x00007f695d467ce0
 Ptr{Void} @0x00007f694d567010
 Ptr{Void} @0x00007f694d567030
 Ptr{Void} @0x00007f695d41aa66
 Ptr{Void} @0x00007f695d461598
 Ptr{Void} @0x00007f695d460b0f
 Ptr{Void} @0x00007f695d460901
 Ptr{Void} @0x00007f695d461b9a
 Ptr{Void} @0x00007f695d4600e8
 Ptr{Void} @0x00007f695d472567
 Ptr{Void} @0x00007f695d4228a6
 Ptr{Void} @0x00007f695ec314c6
 Ptr{Void} @0x00007f695ec315f7
 Ptr{Void} @0x00007f695d41a9da
 Ptr{Void} @0x00007f695ec980cf
 Ptr{Void} @0x00007f695d467b27
 Ptr{Void} @0x00007f695d466abf
 Ptr{Void} @0x00000000004014bd
 Ptr{Void} @0x00007f695cd05ec5
 Ptr{Void} @0x00000000004014f3
 Ptr{Void} @0x0000000000000000

julia> for l in bt
           lkup = ccall(:jl_lookup_code_address, Any, (Ptr{Void},), l)
           @show lkup
       end
lkup = (symbol("???"),symbol("???"),140090513194117,true,140090513194117)
lkup = (symbol("???"),symbol("???"),140090513194208,true,140090513194208)
lkup = (symbol("???"),symbol("???"),140090245804048,true,140090245804048)
lkup = (symbol("???"),symbol("???"),140090245804080,true,140090245804080)
lkup = (symbol("???"),symbol("???"),140090512878182,true,140090512878182)
lkup = (symbol("???"),symbol("???"),140090513167768,true,140090513167768)
lkup = (symbol("???"),symbol("???"),140090513165071,true,140090513165071)
lkup = (symbol("???"),symbol("???"),140090513164545,true,140090513164545)
lkup = (symbol("???"),symbol("???"),140090513169306,true,140090513169306)
lkup = (symbol("???"),symbol("???"),140090513162472,true,140090513162472)
lkup = (symbol("???"),symbol("???"),140090513237351,true,140090513237351)
lkup = (symbol("???"),symbol("???"),140090512910502,true,140090512910502)
lkup = (symbol("???"),symbol("???"),140090538136774,true,140090538136774)
lkup = (symbol("???"),symbol("???"),140090538137079,true,140090538137079)
lkup = (symbol("???"),symbol("???"),140090512878042,true,140090512878042)
lkup = (symbol("???"),symbol("???"),140090538557647,true,140090538557647)
lkup = (symbol("???"),symbol("???"),140090513193767,true,140090513193767)
lkup = (symbol("???"),symbol("???"),140090513189567,true,140090513189567)
lkup = (symbol("???"),symbol("???"),4199613,true,4199613)
lkup = (symbol("???"),symbol("???"),140090505453253,true,140090505453253)
lkup = (symbol("???"),symbol("???"),4199667,true,4199667)
lkup = (:println,symbol("./string.jl"),0,false,0)

This happened with builds for https://github.com/Keno/Cxx.jl.

[tkelman]

Duplicate of #7910 ? I think this has been the case for a while.

[timholy]

Probably right.