Minecraft constantly crashes [duplicate]

Try to increase your RAM. If you don't want to do that, you can try to allocate more RAM through the Minecraft Launcher. How to do that:

1. Go into Profile Editor.
2. In "Java Settings (Advanced)", check JVM arguments.
3. In the entry-box, look for -Xmx1G and replace it with -Xmx[amount of ram goes here] in JVM arguments

The amount of RAM you put in depends on how much you have. If you want to put in 2 gigabytes, type -Xmx2G. If you want to put in 500 Megabytes, type -Xmx500M. Make sure not to put all your RAM into Minecraft.

Try upgrading your Java to a newer version, because the crash report indicates an older version. (Possibly an error for the indication, because it is possible to misindicate Java 8 as Java 1.40)