Sporadic runtime crash after calling takeScreenshot in PhoneWindowManager

[C3C0]

This crash is sporadic as it happens from time to time only. Hard to tell what kind of condition is responsible for it to happen.
Trigger: https://github.com/GravityBox/GravityBox/blob/oreo/src/com/ceco/oreo/gravitybox/ModHwKeys.java#L1621
Framework: 90-beta3
Build fingerprint: 'google/taimen/taimen:8.1.0/OPM4.171019.021.E1/4769646:user/release-keys'
Log:
2018-06-13-14-46-49.txt

Same scenario, different device:
Bullhead_screenshot_crash.txt

According to the user reports, it also happens when screenshot is triggered using native screenshot chord (VolumeKey down + Power key)

[zilinhero]

please fix this bug，the bug is annoying. My device is pixel 2 XL with oreo 8.1.0
it also happens when screenshot is triggered using native screenshot chord (VolumeKey down + Power key)