Big PDF throw drawing failure for widget 'EvWindow': out of memory

 * Xreader version (xreader --version)
xreader 1.8.5
 * Distribution - (Mint 17.2, Arch, Fedora 25, etc...)
Mint 19
Intel Core i7 , 8GB RAM , 
# glxinfo | egrep -i 'device|memory'
    Device: Mesa DRI Intel(R) Haswell Mobile  (0xa16)
    Video memory: 1536MB
    Unified memory: yes

Issue
Search on big pdfs will eventually blank the pdf and buttons and throw

(xreader:18956): Gtk-WARNING **: 21:13:26.870: drawing failure for widget 'EvView': out of memory

(xreader:18956): Gtk-WARNING **: 21:13:26.870: drawing failure for widget 'GtkScrolledWindow': out of memory

(xreader:18956): Gtk-WARNING **: 21:13:26.870: drawing failure for widget 'GtkBox': out of memory

(xreader:18956): Gtk-WARNING **: 21:13:26.870: drawing failure for widget 'GtkPaned': out of memory

(xreader:18956): Gtk-WARNING **: 21:13:26.871: drawing failure for widget 'GtkBox': out of memory

(xreader:18956): Gtk-WARNING **: 21:13:26.871: drawing failure for widget 'EvWindow': out of memory

in the console.

Steps to reproduce
Download for example this PDF (https://access.redhat.com/documentation/en-us/openshift_container_platform/3.5/pdf/developer_guide/OpenShift_Container_Platform-3.5-Developer_Guide-en-US.pdf), open it and search for "oc volume". Try to iterate over the matches. The screen will get blank and the buttons on the app will disapear.

Start by running xreader 1.8.5 with the linked OpenShift PDF and searching for "oc volume", then iterate through the matches while observing the console warnings. Trace the EvView and EvWindow drawing failure until the memory growth is understood; done means the PDF and application controls remain visible during repeated match navigation.