Bug#705518: "BUG: triggered 'if (priv->num_active_touches > priv->num_slots)'" when the system is under high load

[François Bobot <francois@bobot.eu>]

Version: 1.7.3-1+b1

It seems my laptop triggered the same bug, except the mouse doesn't move but the current window
scrolls when I touch the trackpad.

(EE) Backtrace:
(EE) 0: /usr/bin/Xorg (xorg_backtrace+0x48) [0x7f7c6363ae98]
(EE) 1: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7f7c5adac000+0x2a97) [0x7f7c5adaea97]
(EE) 2: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7f7c5adac000+0x49c0) [0x7f7c5adb09c0]
(EE) 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7f7c5adac000+0x6562) [0x7f7c5adb2562]
(EE) 4: /usr/bin/Xorg (0x7f7c63493000+0x92ae8) [0x7f7c63525ae8]
(EE) 5: /usr/bin/Xorg (0x7f7c63493000+0xbad50) [0x7f7c6354dd50]
(EE) 6: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7f7c6232d000+0xf880) [0x7f7c6233c880]
(EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (__select+0x13) [0x7f7c60e49c13]
(EE) 8: /usr/bin/Xorg (WaitForSomething+0x1ac) [0x7f7c6363843c]
(EE) 9: /usr/bin/Xorg (0x7f7c63493000+0x555c1) [0x7f7c634e85c1]
(EE) 10: /usr/bin/Xorg (0x7f7c63493000+0x5968a) [0x7f7c634ec68a]
(EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f7c60d8cb45]
(EE) 12: /usr/bin/Xorg (0x7f7c63493000+0x44c2e) [0x7f7c634d7c2e]
(EE)
(EE) BUG: triggered 'if (priv->num_active_touches > priv->num_slots)'
(EE) BUG: ../../src/synaptics.c:2650 in UpdateTouchState()



A similar fedora bugreport recently mentioned a fix:
  https://bugzilla.redhat.com/show_bug.cgi?id=877464#c105

Best,

-- 
François Bobot