Game crashes after "Backup and Load"

Description: mouseClicked event handler

java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Arrays.java:3236)
	at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:118)
	at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:93)
	at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:153)
	at java.util.zip.DeflaterOutputStream.deflate(DeflaterOutputStream.java:253)
	at java.util.zip.DeflaterOutputStream.write(DeflaterOutputStream.java:211)
	at com.sun.nio.zipfs.ZipFileSystem$EntryOutputStream.write(ZipFileSystem.java:1560)
	at java.nio.file.Files.copy(Files.java:2909)
	at java.nio.file.Files.copy(Files.java:3027)
	at java.nio.file.CopyMoveHelper.copyToForeignTarget(CopyMoveHelper.java:126)
	at java.nio.file.Files.copy(Files.java:1277)
	at bix$1.a(SourceFile:68)
	at bix$1.visitFile(SourceFile:63)
	at java.nio.file.Files.walkFileTree(Files.java:2670)
	at java.nio.file.Files.walkFileTree(Files.java:2742)
	at bix.h(SourceFile:63)
	at bsy.b(SourceFile:173)
	at bsy$$Lambda$178/2032586898.confirmResult(Unknown Source)
	at bpg$1.a(SourceFile:45)
	at bni.mouseClicked(SourceFile:102)
	at bof.mouseClicked(SourceFile:44)
	at bmj.b(SourceFile:64)
	at bmj$$Lambda$163/1413580852.run(Unknown Source)
	at bqb.a(SourceFile:428)
	at bmj.a(SourceFile:64)
	at bmj$$Lambda$108/753214674.invoke(Unknown Source)
	at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:23)
	at org.lwjgl.system.JNI.invokeV(Native Method)
	at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:2599)
	at bmr.a(SourceFile:294)
	at bmh.b(SourceFile:843)
	at bmh.a(SourceFile:376)