On Sun, Dec 24, 2017 at 04:35:26AM +0000, Richard Heck wrote:

> Backtrace?

Attached. Are you able to reproduce?

Scott
#0  0x000000000150fefc in lyx::support::SystemcallPrivate::waitAndCheck 
(this=0x7fffffff8750)
    at /home/scott/lyxbuilds/master/repo/src/support/Systemcall.cpp:406
#1  0x00000000015104c6 in lyx::support::SystemcallPrivate::waitWhile 
(this=0x7fffffff8750, waitwhile=lyx::support::SystemcallPrivate::Starting, 
    process_events=true, timeout=-1) at 
/home/scott/lyxbuilds/master/repo/src/support/Systemcall.cpp:471
#2  0x000000000150e97f in lyx::support::Systemcall::startscript 
(this=0x7fffffff89cb, how=lyx::support::Systemcall::Wait, 
    what="pdflatex  \"Additional.tex\" > /dev/null", 
path="/home/scott/lyxbuilds/master/repo/lib/doc/", lpath="", 
process_events=true)
    at /home/scott/lyxbuilds/master/repo/src/support/Systemcall.cpp:285
#3  0x0000000000debf4e in lyx::LaTeX::startscript (this=0x7fffffff95e0) at 
/home/scott/lyxbuilds/master/repo/src/LaTeX.cpp:478
#4  0x0000000000de9eae in lyx::LaTeX::run (this=0x7fffffff95e0, terr=...) at 
/home/scott/lyxbuilds/master/repo/src/LaTeX.cpp:247
#5  0x0000000000fb37a9 in lyx::Converters::runLaTeX (this=0x7fffffffba90, 
buffer=..., command="pdflatex ", runparams=..., errorList=...)
    at /home/scott/lyxbuilds/master/repo/src/Converter.cpp:821
#6  0x0000000000faf290 in lyx::Converters::convert (this=0x7fffffffba90, 
buffer=0x215a050, from_file=..., to_file=..., orig_from=..., 
    from_format="pdflatex", to_format="pdf2", errorList=..., conversionflags=0) 
at /home/scott/lyxbuilds/master/repo/src/Converter.cpp:570
#7  0x0000000000e4e197 in lyx::Buffer::doExport (this=0x215a050, target="pdf2", 
put_in_tempdir=false, includeall=false, result_file="")
    at /home/scott/lyxbuilds/master/repo/src/Buffer.cpp:4286
#8  0x0000000000e4cc49 in lyx::Buffer::doExport (this=0x215a050, target="pdf2", 
put_in_tempdir=false, result_file="")
    at /home/scott/lyxbuilds/master/repo/src/Buffer.cpp:4143
#9  0x0000000000e4cb4f in lyx::Buffer::doExport (this=0x215a050, target="pdf2", 
put_in_tempdir=false)
    at /home/scott/lyxbuilds/master/repo/src/Buffer.cpp:4125
#10 0x0000000000e43afb in lyx::Buffer::dispatch (this=0x215a050, func=..., 
dr=...) at /home/scott/lyxbuilds/master/repo/src/Buffer.cpp:2616
#11 0x0000000000e437fb in lyx::Buffer::dispatch (this=0x215a050, 
command="buffer-export pdf2", result=...)
    at /home/scott/lyxbuilds/master/repo/src/Buffer.cpp:2581
#12 0x0000000000f304f0 in lyx::LyX::execWithoutGui (this=0x7fffffffd900, 
argc=@0x7fffffffd8fc: 2, argv=0x7fffffffda18)
    at /home/scott/lyxbuilds/master/repo/src/LyX.cpp:568
#13 0x0000000000f388fd in lyx::LyXConsoleApp::doExec (this=0x7fffffffd810) at 
/home/scott/lyxbuilds/master/repo/src/LyX.cpp:237
#14 0x000000000152228f in lyx::support::ConsoleApplicationPrivate::doExec 
(this=0x20340f0)
    at 
/home/scott/lyxbuilds/master/repo/src/support/ConsoleApplicationPrivate.h:54
#15 0x0000000001521f83 in 
lyx::support::ConsoleApplicationPrivate::qt_static_metacall (_o=0x20340f0, 
_c=QMetaObject::InvokeMetaMethod, _id=0, 
    _a=0x2030f80) at 
/home/scott/lyxbuilds/master/CMakeBuild/src/support/moc_ConsoleApplicationPrivate.cpp:71
#16 0x00007ffff6010f57 in QMetaCallEvent::placeMetaCall (this=0x202bd80, 
object=0x20340f0)
    at /usr/src/qt/qt5/qtbase/src/corelib/kernel/qobject.cpp:495
#17 0x00007ffff601211d in QObject::event (this=0x20340f0, e=0x202bd80) at 
/usr/src/qt/qt5/qtbase/src/corelib/kernel/qobject.cpp:1256
#18 0x00007ffff5fd5cb1 in QCoreApplication::event (this=0x20340f0, e=0x202bd80)
    at /usr/src/qt/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1785
#19 0x00007ffff5fd451c in QCoreApplicationPrivate::notify_helper 
(receiver=0x20340f0, event=0x202bd80)
    at /usr/src/qt/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1149
#20 0x00007ffff5fd4146 in doNotify (receiver=0x20340f0, event=0x202bd80) at 
/usr/src/qt/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1090
#21 0x00007ffff5fd40aa in QCoreApplication::notify (this=0x20340f0, 
receiver=0x20340f0, event=0x202bd80)
    at /usr/src/qt/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1076
#22 0x00007ffff5fd4027 in QCoreApplication::notifyInternal2 
(receiver=0x20340f0, event=0x202bd80)
    at /usr/src/qt/qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1015
#23 0x00007ffff5fd8310 in QCoreApplication::sendEvent (receiver=0x20340f0, 
event=0x202bd80)

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