# Bug in julia 0.7
**URL:** https://discourse.julialang.org/t/bug-in-julia-0-7/12014
**Category:** Internals & Design
**Created:** [June 27, 2018, 8:36pm UTC](https://discourse.julialang.org/t/bug-in-julia-0-7/12014 "2018-06-27T20:36:17Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Jean\_Michel](https://discourse.julialang.org/u/Jean_Michel)
#### Post date: [June 27, 2018, 8:36pm UTC](https://discourse.julialang.org/t/bug-in-julia-0-7/12014/1 "2018-06-27T20:36:18Z")
```julia
| | |_| | | | (_| | | Version 0.7.0-beta.0 (2018-06-24 01:32 UTC)
_/ |\ __'_|_|_|\__'_| | Official http://julialang.org/ release
|__/ | x86_64-pc-linux-gnu
julia> map(values,[Dict(:a=>1),Dict(:b=>2)])
2-element Array{Base.ValueIterator{Dict{Symbol,Int64}},1}:
Error showing value of type Array{Base.ValueIterator{Dict{Symbol,Int64}},1}:
ERROR: AssertionError: Array{Int64,1} is not a subtype of Base.ValueIterator{Dict{Symbol,Int64}}
Stacktrace:
[1] typeinfo_prefix(::IOContext{Base.GenericIOBuffer{Array{UInt8,1}}}, ::Array{Int64,1}) at ./arrayshow.jl:477
[2] show_vector(::IOContext{Base.GenericIOBuffer{Array{UInt8,1}}}, ::Array{Int64,1}, ::Char, ::Char) at ./arrayshow.jl:431 (repeats 2 times)
[3] show at ./arrayshow.jl:417 [inlined]
[4] show(::IOContext{Base.GenericIOBuffer{Array{UInt8,1}}}, ::Base.ValueIterator{Dict{Symbol,Int64}}) at ./abstractdict.jl:50
[5] #sprint#330(::IOContext{REPL.Terminals.TTYTerminal}, ::Int64, ::Function, ::Function, ::Base.ValueIterator{Dict{Symbol,Int64}}) at ./strings/io.jl:97
[6] #sprint at ./array.jl:0 [inlined]
[7] alignment at ./show.jl:1719 [inlined]
[8] alignment(::IOContext{REPL.Terminals.TTYTerminal}, ::Array{Base.ValueIterator{Dict{Symbol,Int64}},1}, ::Base.OneTo{Int64}, ::Base.OneTo{Int64}, ::Int64, ::Int64, ::Int64) at ./arrayshow.jl:68
[9] print_matrix(::IOContext{REPL.Terminals.TTYTerminal}, ::Array{Base.ValueIterator{Dict{Symbol,Int64}},1}, ::String, ::String, ::String, ::String, ::String, ::String, ::Int64, ::Int64) at ./arrayshow.jl:186
[10] print_matrix at ./arrayshow.jl:159 [inlined]
[11] print_array at ./arrayshow.jl:308 [inlined]
[12] show(::IOContext{REPL.Terminals.TTYTerminal}, ::MIME{Symbol("text/plain")}, ::Array{Base.ValueIterator{Dict{Symbol,Int64}},1}) at ./arrayshow.jl:344
[13] display(::REPL.REPLDisplay{REPL.LineEditREPL}, ::MIME{Symbol("text/plain")}, ::Array{Base.ValueIterator{Dict{Symbol,Int64}},1}) at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v0.7/REPL/src/REPL.jl:130
```
---
### Author:  [@nalimilan](https://discourse.julialang.org/u/nalimilan)
#### Post date: [June 27, 2018, 8:37pm UTC](https://discourse.julialang.org/t/bug-in-julia-0-7/12014/2 "2018-06-27T20:37:24Z")
Looks like a problem with the new `typeinfo` machinery. Cc: @rfourquet
---
### Author:  [@foobar\_lv2](https://discourse.julialang.org/u/foobar_lv2)
#### Post date: [June 27, 2018, 10:36pm UTC](https://discourse.julialang.org/t/bug-in-julia-0-7/12014/3 "2018-06-27T22:36:56Z")
The bug is only in the display code and also manifests in e.g.
```julia
julia> [keys(Dict(1=>1))]
1-element Array{Base.KeySet{Int64,Dict{Int64,Int64}},1}:
Error showing value of type Array{Base.KeySet{Int64,Dict{Int64,Int64}},1}:
ERROR: AssertionError: Array{Int64,1} is not a subtype of Base.KeySet{Int64,Dict{Int64,Int64}}
```
---
### Author:  [@rfourquet](https://discourse.julialang.org/u/rfourquet)
#### Post date: [June 28, 2018, 10:44am UTC](https://discourse.julialang.org/t/bug-in-julia-0-7/12014/4 "2018-06-28T10:44:54Z")
Thanks, I’m on it! I think it’s the same bug as in an already opened julia issue, that I started to work on.