access violation when accessing root of a closed document

[mzaffalon]

Julia 1.5.3 crashes on the following code (LightXML v0.9.0)

xdoc = parse_file("ex1.xml")
xroot = root(xdoc)
free(xdoc)
xroot

where the file ex1.xml is given in the GitHub page. Here is the error message:

Exception: EXCEPTION_ACCESS_VIOLATION at 0x2bad9cde -- xmlNodeDumpOutputInternal at /workspace/srcdir/libxml2-2.9.10\xmlsave.c:1041
in expression starting at none:0
xmlNodeDumpOutputInternal at /workspace/srcdir/libxml2-2.9.10\xmlsave.c:1041
xmlNodeDumpOutput at /workspace/srcdir/libxml2-2.9.10\xmlsave.c:2377
xmlBufNodeDump at /workspace/srcdir/libxml2-2.9.10\xmlsave.c:2271
xmlNodeDump at /workspace/srcdir/libxml2-2.9.10\xmlsave.c:2207
string at C:\Users\michele.zaffalon\.julia\packages\LightXML\g6rbQ\src\nodes.jl:187
show at C:\Users\michele.zaffalon\.julia\packages\LightXML\g6rbQ\src\nodes.jl:194 [inlined]
show at C:\Users\michele.zaffalon\.julia\packages\LightXML\g6rbQ\src\nodes.jl:223 [inlined]
show at .\multimedia.jl:47
unknown function (ip: 0000000021bc01f4)
display at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\REPL\src\REPL.jl:214
display at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\REPL\src\REPL.jl:218
display at .\multimedia.jl:328
jl_apply at /cygdrive/c/buildbot/worker/package_win64/build/src\julia.h:1690 [inlined]
do_apply at /cygdrive/c/buildbot/worker/package_win64/build/src\builtins.c:655
jl_f__apply at /cygdrive/c/buildbot/worker/package_win64/build/src\builtins.c:669 [inlined]
jl_f__apply_latest at /cygdrive/c/buildbot/worker/package_win64/build/src\builtins.c:705
#invokelatest#1 at .\essentials.jl:710 [inlined]
invokelatest at .\essentials.jl:709 [inlined]
print_response at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\REPL\src\REPL.jl:238
print_response at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\REPL\src\REPL.jl:223
do_respond at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\REPL\src\REPL.jl:822
jfptr_do_respond_29330.clone_1 at C:\Users\michele.zaffalon\AppData\Local\Programs\Julia 1.5.3\lib\julia\sys.dll (unknown line)
jl_apply at /cygdrive/c/buildbot/worker/package_win64/build/src\julia.h:1690 [inlined]
do_apply at /cygdrive/c/buildbot/worker/package_win64/build/src\builtins.c:655
jl_f__apply at /cygdrive/c/buildbot/worker/package_win64/build/src\builtins.c:669 [inlined]
jl_f__apply_latest at /cygdrive/c/buildbot/worker/package_win64/build/src\builtins.c:705
#invokelatest#1 at .\essentials.jl:710 [inlined]
invokelatest at .\essentials.jl:709 [inlined]
run_interface at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\REPL\src\LineEdit.jl:2355
jfptr_run_interface_30026.clone_1 at C:\Users\michele.zaffalon\AppData\Local\Programs\Julia 1.5.3\lib\julia\sys.dll (unknown line)
run_frontend at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\REPL\src\REPL.jl:1144#38 at .\task.jl:356
jfptr_YY.38_29208.clone_1 at C:\Users\michele.zaffalon\AppData\Local\Programs\Julia 1.5.3\lib\julia\sys.dll (unknown line)
jl_apply at /cygdrive/c/buildbot/worker/package_win64/build/src\julia.h:1690 [inlined]
start_task at /cygdrive/c/buildbot/worker/package_win64/build/src\task.c:705
Allocations: 3140812 (Pool: 3139784; Big: 1028); GC: 4