I just got the following in the REPL:

julia> module Foo

       type Bar{T} end

       end

signal (11): Segmentation fault
unknown function (ip: -716631494)
jl_get_binding at /opt/julia-0.4/usr/bin/../lib/libjulia.so (unknown line)
jl_get_global at /opt/julia-0.4/usr/bin/../lib/libjulia.so (unknown line)
jl_module_run_initializer at /opt/julia-0.4/usr/bin/../lib/libjulia.so (unknown 
line)
unknown function (ip: -716770303)
unknown function (ip: -716771435)
jl_toplevel_eval_in at /opt/julia-0.4/usr/bin/../lib/libjulia.so (unknown line)
eval_user_input at REPL.jl:54
jlcall_eval_user_input_42363 at  (unknown line)
jl_apply_generic at /opt/julia-0.4/usr/bin/../lib/libjulia.so (unknown line)
anonymous at task.jl:96
unknown function (ip: -716815279)
unknown function (ip: 0)

I’ve seen segfaults a couple of times since I last built Julia from source, 
but I was always too concentrated on what I was doing to try to pin it down 
- but this time I wasn’t =) I hadn’t done anything in that session except a 
few Pkg commands, but I couldn’t reproduce the problem either in a fresh 
REPL or in one where I ran exactly the same Pkg commands in the same 
sequence before doing that. Is this a known problem, or should I report it 
on github?

julia> versioninfo()
Julia Version 0.4.0-dev+2416
Commit db3fa60 (2015-01-02 18:23 UTC)
Platform Info:
  System: Linux (x86_64-linux-gnu)
  CPU: Intel(R) Core(TM) i7-4600U CPU @ 2.10GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Haswell)
  LAPACK: libopenblas
  LIBM: libopenlibm
  LLVM: libLLVM-3.3

// T
​

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