Bug#763504: gnuplot5-qt: "pause mouse close" makes gnuplot freeze when quitting the window

[Vincent Lefevre]

Package: gnuplot5-qt
Version: 5.0.0~rc+dfsg-1
Severity: normal

Since recent versions of gnuplot, the wxt terminal is no longer
available, and a similar replacement is the qt terminal with
gnuplot 5 by using "pause mouse close" after the plot (with the
wxt terminal, -persist could be used to keep gnuplot running).
This will allow the following bugs to be closed and fixed:

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=711139
  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=711141

However, when closing the window either by typing 'q' or via my
window manager, gnuplot is still running and freezing.

For instance, consider a script with:

gnuplot <<EOF
plot '-' using 1:2 t '' with line
0 0
10 10
e
pause mouse close
print "Done"
EOF

One needs to type Ctrl-C, so that gnuplot resumes and outputs "Done".

There's a similar upstream bug:

  http://sourceforge.net/p/gnuplot/bugs/1489/

but I don't get zombie processes: gnuplot is still really running.

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gnuplot5-qt depends on:
ii  gnuplot5-data        5.0.0~rc+dfsg-1
ii  libc6                2.19-11
ii  libcairo2            1.12.16-5
ii  libedit2             3.1-20140620-2
ii  libgcc1              1:4.9.1-15
ii  libgd3               2.1.0-4.1
ii  libglib2.0-0         2.42.0-1
ii  liblua5.1-0          5.1.5-7
ii  libpango-1.0-0       1.36.7-1
ii  libpangocairo-1.0-0  1.36.7-1
ii  libqt5core5a         5.3.2+dfsg-2
ii  libqt5gui5           5.3.2+dfsg-2
ii  libqt5network5       5.3.2+dfsg-2
ii  libqt5printsupport5  5.3.2+dfsg-2
ii  libqt5svg5           5.3.2-2
ii  libqt5widgets5       5.3.2+dfsg-2
ii  libstdc++6           4.9.1-15
ii  libx11-6             2:1.6.2-3

gnuplot5-qt recommends no packages.

Versions of packages gnuplot5-qt suggests:
ii  gnuplot5-doc  5.0.0~rc+dfsg-1

-- no debconf information