Upon exiting one world, opening another, quickly exiting that, and reloading the first world, rendering flickered and the game crashed. Below is part of the server log that I copied and pasted in. I removed a very repetitive segment to avoid spamming and omitted my player name for privacy. I also omitted some lines that didn't look important, though I don't know enough to say that with much confidence.

[17:15:21] [Server thread/INFO]: <playername> joined the game
[17:15:21] [Server thread/INFO]: Changing view distance to 12, from 10
[17:21:57] [Client thread/WARN]: Unable to play empty soundEvent: minecraft:entity.snowman.ambient
[17:25:46] [Server thread/INFO]: Saving and pausing game...
[17:25:46] [Server thread/INFO]: Saving chunks for level 'The Promised Land'/Overworld
[17:25:46] [Server thread/INFO]: Saving chunks for level 'The Promised Land'/Nether
[17:25:46] [Server thread/INFO]: Saving chunks for level 'The Promised Land'/The End
[17:25:47] [Server thread/INFO]: Stopping server
[17:25:47] [Server thread/INFO]: Saving players
[17:25:47] [Server thread/INFO]: Saving worlds
[17:25:47] [Server thread/INFO]: Saving chunks for level 'The Promised Land'/Overworld
[17:25:47] [Server thread/INFO]: Saving chunks for level 'The Promised Land'/Nether
[17:25:47] [Server thread/INFO]: Saving chunks for level 'The Promised Land'/The End
[17:25:51] [Server thread/INFO]: Starting integrated minecraft server version 1.9-pre4
[17:25:51] [Server thread/INFO]: Generating keypair
[17:25:51] [Server thread/INFO]: Preparing start region for level 0
[17:25:51] [Server thread/INFO]: Changing view distance to 12, from 10
[17:25:51] [Server thread/INFO]: <playername>[local:E:a89d3f28] logged in with entity id 621811 at (10.139596206299872, 107.81949013520517, -3.445244017459327)
[17:25:51] [Server thread/INFO]: <playername> joined the game
[17:26:18] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2091ms behind, skipping 41 tick(s)
[17:26:46] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2256ms behind, skipping 45 tick(s)
[17:27:15] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2129ms behind, skipping 42 tick(s)
[17:27:31] [Server thread/INFO]: Saving and pausing game...
[17:27:31] [Server thread/INFO]: Saving chunks for level 'IronFarm'/Overworld
[17:27:31] [Server thread/INFO]: Saving chunks for level 'IronFarm'/Nether
[17:27:31] [Server thread/INFO]: Saving chunks for level 'IronFarm'/The End
[17:27:32] [Server thread/INFO]: Stopping server
[17:27:32] [Server thread/INFO]: Saving players
[17:27:32] [Server thread/INFO]: Saving worlds
[17:27:32] [Server thread/INFO]: Saving chunks for level 'IronFarm'/Overworld
[17:27:32] [Server thread/INFO]: Saving chunks for level 'IronFarm'/Nether
[17:27:32] [Server thread/INFO]: Saving chunks for level 'IronFarm'/The End
[17:27:35] [Server thread/INFO]: Starting integrated minecraft server version 1.9-pre4
[17:27:35] [Server thread/INFO]: Generating keypair
[17:27:35] [Server thread/INFO]: Preparing start region for level 0
[17:27:36] [Server thread/INFO]: Preparing spawn area: 34%
[17:27:37] [Server thread/INFO]: Preparing spawn area: 98%
[17:27:37] [Server thread/INFO]: Changing view distance to 12, from 10
[17:27:37] [Server thread/INFO]: <playername>[local:E:6af85c3d] logged in with entity id 624126 at (-153.25243481705957, 216.0, 17.30000001192093)
[17:27:37] [Server thread/INFO]: <playername> joined the game
[17:27:43] [Client thread/ERROR]: ########## GL ERROR ##########
[17:27:43] [Client thread/ERROR]: @ Post render
[17:27:43] [Client thread/ERROR]: 1285: Out of memory

The previous three lines repeat several hundred times

#

1. A fatal error has been detected by the Java Runtime Environment:
   #
2. EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x507dbaf9, pid=6644, tid=3200
   #
3. JRE version: Java(TM) SE Runtime Environment (8.0_72-b15) (build 1.8.0_72-b15)
4. Java VM: Java HotSpot(TM) Client VM (25.72-b15 mixed mode windows-x86 )
5. Problematic frame:
6. C [ig9icd32.dll+0x47baf9]

Failed to write core dump. Minidumps are not enabled by default on client versions of Windows