Bug#844484: Warning: slow font initialization + graph not displayed in the window

[Vincent Lefevre]

Package: gnuplot-qt
Version: 5.0.5+dfsg1-4
Severity: important

With the following:

$ /usr/bin/gnuplot -persist <<EOF
plot '-' using 1:2 t '' with line
0 0
10 10
e
EOF

gnuplot sometimes outputs "Warning: slow font initialization" in
the terminal (about 1 over 10 or 20 tests on my machine) and the
graph is not displayed in the window.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.8.0-1-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
Init: systemd (via /run/systemd/system)

Versions of packages gnuplot-qt depends on:
ii  gnuplot-data         5.0.5+dfsg1-4
ii  libc6                2.24-5
ii  libcairo2            1.14.6-1.1
ii  libedit2             3.1-20160903-1
ii  libgcc1              1:6.2.0-13
ii  libgd3               2.2.3-87-gd0fec80-3
ii  libglib2.0-0         2.50.2-1
ii  liblua5.1-0          5.1.5-8.1+b1
ii  libpango-1.0-0       1.40.3-3
ii  libpangocairo-1.0-0  1.40.3-3
ii  libqt5core5a         5.7.1~20161021+dfsg-5
ii  libqt5gui5           5.7.1~20161021+dfsg-5
ii  libqt5network5       5.7.1~20161021+dfsg-5
ii  libqt5printsupport5  5.7.1~20161021+dfsg-5
ii  libqt5svg5           5.7.1~20161021-2
ii  libqt5widgets5       5.7.1~20161021+dfsg-5
ii  libstdc++6           6.2.0-13
ii  libwxbase3.0-0v5     3.0.2+dfsg-2
ii  libwxgtk3.0-0v5      3.0.2+dfsg-2
ii  libx11-6             2:1.6.3-1

gnuplot-qt recommends no packages.

Versions of packages gnuplot-qt suggests:
ii  gnuplot-doc  5.0.5+dfsg1-4

-- no debconf information