Streaming interface crashes Julia

[IlyaOrson]

I get a weird error that asks me to file a bug report and crashes julia. It appears while using the streaming interface, where I use expandtree and throw an error inside the loop of the elements of the node generated.

It's tricky but here are some experiments that sometimes throw the error.

• If I use the reader = open() ... close(reader) syntax then it won't crash but throw a warning instead (see below).
• If I use the open() do reader... end syntax and toggle between error and throwerror the error appears and dissappears. Here is my MWE:

using EzXML

function load_error_graphml(filename)
    # reader = open(EzXML.StreamReader, filename)
    open(EzXML.StreamReader, filename) do reader #
        serial = 0
        nodes = Dict{String,Int}()
        edges = Pair{Int,Int}[]
        for typ in reader
            if typ == EzXML.READER_ELEMENT
                elname = EzXML.nodename(reader)
                if elname == "node"
                    serial += 1
                    nodes[reader["id"]] = serial
                elseif elname == "edge"
                    info = EzXML.expandtree(reader)
                    for element in EzXML.eachelement(info)
                        # throw(KeyError)
                        error("Hi!") #
                    end
                end
            end
        end
    end #
    # close(reader)
end

I get this message before the crash:

Please submit a bug report with steps to reproduce this fault, and any error messages that follow (in their entirety). Thanks.
Exception: EXCEPTION_ACCESS_VIOLATION at 0xecbbd02 -- #3 at C:\Users\ilya.sandoval.julia\v0.6\EzXML\src\node.jl:320
while loading C:\Users\ilya.sandoval.atom\packages\julia-client\script\boot.jl, in expression starting on line 303
#3 at C:\Users\ilya.sandoval.julia\v0.6\EzXML\src\node.jl:320
traverse_tree at C:\Users\ilya.sandoval.julia\v0.6\EzXML\src\node.jl:486
finalize_node at C:\Users\ilya.sandoval.julia\v0.6\EzXML\src\node.jl:316
unknown function (ip: 000000000ECBBCA6)
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
jl_apply at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia.h:1424 [inlined]
run_finalizer at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gc.c:111
jl_gc_run_finalizers_in_list at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gc.c:200
run_finalizers at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gc.c:234
jl_gc_collect at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gc.c:2112
jl_gc_pool_alloc at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gc.c:919 [inlined]
jl_gc_alloc_ at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:249 [inlined]
jl_gc_alloc at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gc.c:2129
new_array at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\array.c:96 [inlined]
new_array at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\array.c:149 [inlined]
jl_alloc_array_1d at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\array.c:372
flatten at C:\Users\ilya.sandoval.julia\v0.6\CodeTools\src\summaries.jl:7
description at C:\Users\ilya.sandoval.julia\v0.6\CodeTools\src\summaries.jl:82
withmeta at C:\Users\ilya.sandoval.julia\v0.6\CodeTools\src\completions.jl:50
collect_to! at .\array.jl:474
unknown function (ip: 000000000ECD096B)
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
collect_to! at .\array.jl:484
unknown function (ip: 000000000ECCCD0B)
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
collect at .\array.jl:442
withmeta at C:\Users\ilya.sandoval.julia\v0.6\CodeTools\src\completions.jl:58
unknown function (ip: 000000000ECCC6CA)
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
namecompletions at C:\Users\ilya.sandoval.julia\v0.6\CodeTools\src\completions.jl:63
unknown function (ip: 000000000ECC893D)
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
jl_apply at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia.h:1424 [inlined]
jl_f__apply at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\builtins.c:426
#5 at C:\Users\ilya.sandoval.julia\v0.6\CodeTools\src\utils.jl:18
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_invoke at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:41
#completions#42 at C:\Users\ilya.sandoval.julia\v0.6\CodeTools\src\completions.jl:190
unknown function (ip: 000000000ECC2D19)
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
#completions at .<missing>:0
completions at C:\Users\ilya.sandoval.julia\v0.6\CodeTools\src\completions.jl:195
unknown function (ip: 000000000ECC7866)
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
#103 at C:\Users\ilya.sandoval.julia\v0.6\Atom\src\completions.jl:23
unknown function (ip: 000000000ECC7786)
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
jl_apply_2va at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\rtutils.c:286
handlemsg at C:\Users\ilya.sandoval.julia\v0.6\Atom\src\comm.jl:163
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
jl_apply at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia.h:1424 [inlined]
jl_f__apply at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\builtins.c:426
#11 at .\event.jl:73
jl_call_fptr_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:339 [inlined]
jl_call_method_internal at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia_internal.h:358 [inlined]
jl_apply_generic at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\gf.c:1933
jl_apply at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\julia.h:1424 [inlined]
start_task at /home/Administrator/buildbot/slave/package_win6_2-x64/build/src/home/Administrator/buildbot/slave/package_win6_2-x64/build/src\task.c:267
Allocations: 7319388 (Pool: 7317609; Big: 1779); GC: 16

The warning (the best clue?):

error in running finalizer:
TypeError(func=:#3, context="typeassert", expected=EzXML.Node, got=<?#00000000169B0C10::<?#00000000169B0C20::0000000000000000>>)

My version:

julia> versioninfo()
Julia Version 0.6.0
Commit 903644385b* (2017-06-19 13:05 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Haswell)
  LAPACK: libopenblas64_
  LIBM: libopenlibm
  LLVM: libLLVM-3.9.1 (ORCJIT, broadwell)

[IlyaOrson]

I am using this .graphml file:

<?xml version='1.0' encoding='utf-8'?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd"><key attr.name="length" attr.type="string" for="edge" id="d11"/>
<key attr.name="maxspeed" attr.type="string" for="edge" id="d10"/>
<key attr.name="highway" attr.type="string" for="edge" id="d9"/>
<key attr.name="name" attr.type="string" for="edge" id="d8"/>
<key attr.name="lanes" attr.type="string" for="edge" id="d7"/>
<key attr.name="oneway" attr.type="string" for="edge" id="d6"/>
<key attr.name="osmid" attr.type="string" for="edge" id="d5"/>
<key attr.name="osmid" attr.type="string" for="node" id="d4"/>
<key attr.name="x" attr.type="string" for="node" id="d3"/>
<key attr.name="y" attr.type="string" for="node" id="d2"/>
<key attr.name="crs" attr.type="string" for="graph" id="d1"/>
<key attr.name="name" attr.type="string" for="graph" id="d0"/>
<graph edgedefault="directed"><data key="d0">unnamed</data>
<data key="d1">{'init': 'epsg:4326'}</data>
<node id="268378315">
  <data key="d2">19.4112989</data>
  <data key="d3">-99.1661278</data>
  <data key="d4">268378315</data>
</node>
<node id="767144194">
  <data key="d2">19.4106784</data>
  <data key="d3">-99.1659731</data>
  <data key="d4">767144194</data>
</node>
<node id="767144208">
  <data key="d2">19.4096445</data>
  <data key="d3">-99.1656919</data>
  <data key="d4">767144208</data>
</node>
<node id="5117499534">
  <data key="d2">19.4113146</data>
  <data key="d3">-99.1660387</data>
  <data key="d4">5117499534</data>
</node>
<edge id="0" source="767144194" target="268378315">
  <data key="d5">24690027</data>
  <data key="d6">True</data>
  <data key="d7">2</data>
  <data key="d8">Manzanillo</data>
  <data key="d9">residential</data>
  <data key="d10">40</data>
  <data key="d11">70.87837651238934</data>
</edge>
<edge id="0" source="767144208" target="767144194">
  <data key="d5">24690027</data>
  <data key="d6">True</data>
  <data key="d7">2</data>
  <data key="d8">Manzanillo</data>
  <data key="d9">residential</data>
  <data key="d10">40</data>
  <data key="d11">118.68687083701978</data>
</edge>
<edge id="0" source="5117499534" target="268378315">
  <data key="d5">24690037</data>
  <data key="d6">True</data>
  <data key="d7">1</data>
  <data key="d8">Tapachula</data>
  <data key="d9">residential</data>
  <data key="d11">9.505876802183968</data>
</edge>
</graph></graphml>

[bicycle1885]

Thank you for reporting. I think this will be fixed in #39. Can you try the branch?

[IlyaOrson]

That seems to fix it, thanks!