There is a new version of this package, is the error still happening?
Also please have a look at
https://bugs.launchpad.net/ubuntu/+source/glib2.0/+bug/933418
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https://bugs.launchpad.net/bugs/926650
Title:
package libglib2.0-0 2.28.6-0ubuntu1 failed to install/upgrade:
subprocess installed post-installation script