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efl 1.21.0: widget preview generation hangs
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Description

Hitting a repeatable freeze in make doc, tracked it to widget preview generation. I have to Ctrl-C a bunch of get back out:

~/src/e/efl-tarball/efl-1.21.0$ ./configure --enable-xinput22 --enable-systemd --enable-image-loader-webp --enable-harfbuzz --enable-multisense --enable-liblz4 --disable-silent-rules
...
~/src/e/efl-tarball/efl-1.21.0$ make -j8
...
~/src/e/efl-tarball/efl-1.21.0/doc$ make widget-preview
make[1]: Entering directory '/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets'
Generating widget preview image preview-00.png for widget actionslider
ERR<20923>:elementary lib/elementary/elm_module.c:114 _elm_module_find_as() Failed to load elementary module: 'prefs_iface': No such file or directory
## Copy & Paste the below (until EOF) into a terminal, then hit Enter

eina_btlog << EOF
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829369 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829f36 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff99282b20f 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff993501dd7 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff993516a06 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934ea1ba 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934ea5ab 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b142 0x55eef322a000
/lib/x86_64-linux-gnu/libc.so.6  0x7ff993173b17 0x7ff993151000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b18a 0x55eef322a000
EOF

ERR<20923>:edje lib/edje/edje_load.c:480 edje_file_data_get() File [/usr/local/share/elementary/themes/default.edj] can not be opened.
## Copy & Paste the below (until EOF) into a terminal, then hit Enter

eina_btlog << EOF
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829369 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829f36 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff99282b20f 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/edje/.libs/libedje.so.1  0x7ff990bc73d7 0x7ff990b33000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358a45f 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358ae71 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d1157 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358b2bc 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d1157 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928ce784 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b293 0x55eef322a000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b14c 0x55eef322a000
/lib/x86_64-linux-gnu/libc.so.6  0x7ff993173b17 0x7ff993151000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b18a 0x55eef322a000
EOF

ERR<20923>:elementary lib/elementary/efl_ui_win.c:4406 _efl_system_theme_path_get() Default system theme is too old, something is wrong with your installation of EFL.
## Copy & Paste the below (until EOF) into a terminal, then hit Enter

eina_btlog << EOF
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829369 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829f36 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff99282b20f 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358a6ff 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358ae71 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d1157 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358b2bc 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d1157 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928ce784 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b293 0x55eef322a000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b14c 0x55eef322a000
/lib/x86_64-linux-gnu/libc.so.6  0x7ff993173b17 0x7ff993151000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b18a 0x55eef322a000
EOF

ERR<20923>:elementary lib/elementary/efl_ui_win.c:4454 _elm_win_frame_add() Failed to set main border theme for the window.
## Copy & Paste the below (until EOF) into a terminal, then hit Enter

eina_btlog << EOF
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829369 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829f36 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff99282b20f 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358a72f 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358ae71 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d1157 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99358b2bc 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d1157 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928ce784 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b293 0x55eef322a000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b14c 0x55eef322a000
/lib/x86_64-linux-gnu/libc.so.6  0x7ff993173b17 0x7ff993151000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b18a 0x55eef322a000
EOF

CRI<20923>:elementary lib/elementary/efl_ui_bg_widget.c:39 _efl_ui_bg_widget_efl_object_constructor() Failed to set layout!
## Copy & Paste the below (until EOF) into a terminal, then hit Enter

eina_btlog << EOF
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829369 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829f36 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff99282b20f 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99341df9d 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99341e17c 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928cd5bf 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99341e11b 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b29e 0x55eef322a000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b14c 0x55eef322a000
/lib/x86_64-linux-gnu/libc.so.6  0x7ff993173b17 0x7ff993151000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b18a 0x55eef322a000
EOF

CRI<20923>:elementary lib/elementary/elm_actionslider.c:532 _elm_actionslider_efl_canvas_group_group_add() Failed to set layout!
## Copy & Paste the below (until EOF) into a terminal, then hit Enter

eina_btlog << EOF
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829369 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829f36 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff99282b20f 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff993411855 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/.libs/libevas.so.1  0x7ff9937dc387 0x7ff993748000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/.libs/libevas.so.1  0x7ff9937dfef9 0x7ff993748000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff993575be2 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934dd3cf 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99341249c 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928cd5bf 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934114ab 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b2bc 0x55eef322a000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b14c 0x55eef322a000
/lib/x86_64-linux-gnu/libc.so.6  0x7ff993173b17 0x7ff993151000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b18a 0x55eef322a000
EOF

ERR<20923>:elementary lib/elementary/efl_ui_layout_object.c:1014 _efl_ui_layout_content_set() could not swallow 0x40000000d072 into part 'elm.drag_button_base'
## Copy & Paste the below (until EOF) into a terminal, then hit Enter

eina_btlog << EOF
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829369 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829f36 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff99282b20f 0x7ff992800000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934d848e 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/efl/.libs/libefl.so.1    0x7ff9927c8f0f 0x7ff9927a6000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934d9db8 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff993411815 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/.libs/libevas.so.1  0x7ff9937dc387 0x7ff993748000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/.libs/libevas.so.1  0x7ff9937dfef9 0x7ff993748000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff993575be2 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934dd3cf 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99341249c 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928cd5bf 0x7ff9928c0000
/home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934114ab 0x7ff99331f000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b2bc 0x55eef322a000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b14c 0x55eef322a000
/lib/x86_64-linux-gnu/libc.so.6  0x7ff993173b17 0x7ff993151000
/home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b18a 0x55eef322a000
EOF

In case it helps, here's the backtrace from widget_preview_actionslider:

~/src/e/efl-tarball/efl-1.21.0/doc$ ../src/bin/eina/eina_btlog/eina_btlog << EOF
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829369 0x7ff992800000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff992829f36 0x7ff992800000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1  0x7ff99282b20f 0x7ff992800000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934d848e 0x7ff99331f000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/efl/.libs/libefl.so.1    0x7ff9927c8f0f 0x7ff9927a6000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934d9db8 0x7ff99331f000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff993411815 0x7ff99331f000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/.libs/libevas.so.1  0x7ff9937dc387 0x7ff993748000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/.libs/libevas.so.1  0x7ff9937dfef9 0x7ff993748000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff993575be2 0x7ff99331f000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934dd3cf 0x7ff99331f000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff99341249c 0x7ff99331f000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928d0fe7 0x7ff9928c0000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1      0x7ff9928cd5bf 0x7ff9928c0000
> /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1      0x7ff9934114ab 0x7ff99331f000
> /home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b2bc 0x55eef322a000
> /home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b14c 0x55eef322a000
> /lib/x86_64-linux-gnu/libc.so.6  0x7ff993173b17 0x7ff993151000
> /home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider    0x55eef322b18a 0x55eef322a000
> EOF
          /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1               |                  /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/eina_log.c                   : 2055 @ eina_log_print_cb_stderr()
          /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1               |                  /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/eina_log.c                   : 1456 @ eina_log_print_unlocked()
          /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/.libs/libeina.so.1               |                  /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eina/eina_log.c                   : 2260 @ eina_log_print()
    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1         |            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/elm_widget.h                 :  819 @ _elm_widget_sub_object_redirect_to_top()
           /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/efl/.libs/libefl.so.1                | /home/ross/src/e/efl-tarball/efl-1.21.0/src/../src/lib/efl/interfaces/efl_content.eo.c             :    1 @ efl_content_set()
    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1         |            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/efl_ui_layout_object.c       :  970 @ elm_layout_content_set()
    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1         |            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/elm_actionslider.c           :  536 @ _elm_actionslider_efl_canvas_group_group_add()
          /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/.libs/libevas.so.1               |           /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/canvas/evas_object_smart.c          : 1858 @ efl_canvas_group_add()
          /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/.libs/libevas.so.1               |           /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/evas/canvas/evas_object_smart.c          :  705 @ _efl_canvas_group_efl_object_constructor()
            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1                 |                    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/efl_object.eo.c              :   60 @ efl_constructor()
    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1         |            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/efl_ui_widget.c              : 5365 @ _efl_ui_widget_efl_object_constructor()
            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1                 |                    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/efl_object.eo.c              :   60 @ efl_constructor()
    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1         |            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/efl_ui_layout_object.c       : 2210 @ _efl_ui_layout_object_efl_object_constructor()
            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1                 |                    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/efl_object.eo.c              :   60 @ efl_constructor()
    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1         |            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/elm_actionslider.c           :  550 @ _elm_actionslider_efl_object_constructor()
            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1                 |                    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/efl_object.eo.c              :   60 @ efl_constructor()
            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/.libs/libeo.so.1                 |                    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/eo/eo.c                         :  917 @ _efl_add_internal_start()
    /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/.libs/libelementary.so.1         |            /home/ross/src/e/efl-tarball/efl-1.21.0/src/lib/elementary/elm_actionslider.c           :  543 @ elm_actionslider_add()
           /home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider|                   /home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/widget_preview_actionslider.c:    4 @ elm_main()
           /home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider|                   /home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/widget_preview_tmpl_foot.c   :    8 @ main()
                                               /lib/x86_64-linux-gnu/libc.so.6                  |                                                                    ??/??                           :    8 @ __libc_start_main()
           /home/ross/src/e/efl-tarball/efl-1.21.0/doc/widgets/.libs/widget_preview_actionslider|                                                                    ??/??                           :    8 @ _start()