Randomly occuring error on reading large MAT files

Reproduce the failure by repeatedly reading multiple large MAT files with matread, using the reported Julia 0.6.2 and Windows setup if available. Start with MAT_HDF5.jl at m_read and the attribute-reading calls shown in the stack trace, then inspect the HDF5.jl interaction. Done means repeated reads no longer leave subsequent files unreadable and a regression test covers the failure.

There is an error which occurs every time I try to read multiple large MAT files.
Strangely enough, the error occurs only from time to time, and once it appears I can't load any further files without restarting Julia. I am running the newest versions of all packages and the standard build of Julia 0.6.2 on Windows.

In the Atom IDE I see the following:

Error getting attribute type
h5a_get_type at HDF5.jl:2152 [inlined]
datatype(::HDF5.HDF5Attribute) at HDF5.jl:1125
read(::HDF5.HDF5Attribute, ::Type{String}) at HDF5.jl:1323
a_read(::HDF5.HDF5Dataset, ::String) at HDF5.jl:1229
m_read(::HDF5.HDF5Dataset) at MAT_HDF5.jl:153
m_read(::HDF5.HDF5Dataset) at MAT_HDF5.jl:163
m_read(::HDF5.HDF5Group) at MAT_HDF5.jl:239
read(::MAT.MAT_HDF5.MatlabHDF5File, ::String) at MAT_HDF5.jl:258
read(::MAT.MAT_HDF5.MatlabHDF5File) at datafile.jl:45
matread(::String) at MAT.jl:132
load_matlab(::String, ::String) at data_preparation.jl:93
macro expansion at load_matlab_traces_to_jld2.jl:59 [inlined]
anonymous at <missing>:?
include_string(::String, ::String) at loading.jl:522
include_string(::String, ::String, ::Int64) at eval.jl:30
include_string(::Module, ::String, ::String, ::Int64, ::Vararg{Int64,N} where N) at eval.jl:34
(::Atom.##102#107{String,Int64,String})() at eval.jl:82
withpath(::Atom.##102#107{String,Int64,String}, ::String) at utils.jl:30
withpath(::Function, ::String) at eval.jl:38
hideprompt(::Atom.##101#106{String,Int64,String}) at repl.jl:67
macro expansion at eval.jl:80 [inlined]
(::Atom.##100#105{Dict{String,Any}})() at task.jl:80

And the console prints out

HDF5-DIAG: Error detected in HDF5 (1.8.13) thread 0:
  #000: /home/abuild/rpmbuild/BUILD/hdf5-1.8.13/src/H5A.c line 1302 in H5Aget_type(): unable to regi
ster datatype ID
    major: Object atom
    minor: Unable to register new atom
  #001: /home/abuild/rpmbuild/BUILD/hdf5-1.8.13/src/H5I.c line 895 in H5I_register(): can't insert I
D node into skip list
    major: Object atom
    minor: Unable to insert object
  #002: /home/abuild/rpmbuild/BUILD/hdf5-1.8.13/src/H5SL.c line 995 in H5SL_insert(): can't create n
ew skip list node
    major: Skip Lists
    minor: Unable to insert object
  #003: /home/abuild/rpmbuild/BUILD/hdf5-1.8.13/src/H5SL.c line 687 in H5SL_insert_common(): can't i
nsert duplicate key
    major: Skip Lists
    minor: Unable to insert object