crash log issue

[07:57:41] [Client thread/INFO]: Setting user: xXiPhilXx
[07:57:45] [Thread-185/ERROR]: Unable to build datafixers
java.util.concurrent.CompletionException: java.lang.InternalError: linkToTargetMethod=Lambda(a0:L,a1:L,a2:L,a3:L)=>{
    t4:L=MethodHandle.invokeBasic(a3:L,a0:L,a1:L,a2:L);t4:L}
	at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:273) ~[?:1.8.0_51]
	at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:280) [?:1.8.0_51]
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1621) [?:1.8.0_51]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_51]
Caused by: java.lang.InternalError: linkToTargetMethod=Lambda(a0:L,a1:L,a2:L,a3:L)=>{
    t4:L=MethodHandle.invokeBasic(a3:L,a0:L,a1:L,a2:L);t4:L}
	at java.lang.invoke.MethodHandleStatics.newInternalError(MethodHandleStatics.java:117) ~[?:1.8.0_51]
	at java.lang.invoke.LambdaForm.compileToBytecode(LambdaForm.java:635) ~[?:1.8.0_51]
	at java.lang.invoke.Invokers.callSiteForm(Invokers.java:377) ~[?:1.8.0_51]
	at java.lang.invoke.Invokers.linkToTargetMethod(Invokers.java:343) ~[?:1.8.0_51]
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:314) ~[?:1.8.0_51]
	at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297) ~[?:1.8.0_51]
	at abe.makeRule(SourceFile:22) ~[1.13.2.jar:?]
	at com.mojang.datafixers.DataFix.getRule(DataFix.java:97) ~[datafixerupper-1.0.21.jar:?]
	at com.mojang.datafixers.DataFixerUpper.lambda$getRule$6(DataFixerUpper.java:136) ~[datafixerupper-1.0.21.jar:?]
	at com.mojang.datafixers.DataFixerUpper$$Lambda$398/19497384.apply(Unknown Source) ~[?:?]
	at java.util.Map.computeIfAbsent(Map.java:957) ~[?:1.8.0_51]
	at it.unimi.dsi.fastutil.longs.Long2ObjectMap.computeIfAbsent(Long2ObjectMap.java:606) ~[fastutil-8.2.1.jar:?]
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:530) ~[fastutil-8.2.1.jar:?]
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:295) ~[fastutil-8.2.1.jar:?]
	at com.mojang.datafixers.DataFixerUpper.getRule(DataFixerUpper.java:131) ~[datafixerupper-1.0.21.jar:?]
	at com.mojang.datafixers.DataFixerBuilder.lambda$build$1(DataFixerBuilder.java:72) ~[datafixerupper-1.0.21.jar:?]
	at com.mojang.datafixers.DataFixerBuilder$$Lambda$382/26705850.run(Unknown Source) ~[?:?]
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1618) ~[?:1.8.0_51]
	... 1 more
Caused by: java.lang.OutOfMemoryError: Metaspace
	at sun.misc.Unsafe.defineAnonymousClass(Native Method) ~[?:1.8.0_51]
	at java.lang.invoke.InvokerBytecodeGenerator.loadAndInitializeInvokerClass(InvokerBytecodeGenerator.java:282) ~[?:1.8.0_51]
	at java.lang.invoke.InvokerBytecodeGenerator.loadMethod(InvokerBytecodeGenerator.java:274) ~[?:1.8.0_51]
	at java.lang.invoke.InvokerBytecodeGenerator.generateCustomizedCode(InvokerBytecodeGenerator.java:616) ~[?:1.8.0_51]
	at java.lang.invoke.LambdaForm.compileToBytecode(LambdaForm.java:629) ~[?:1.8.0_51]
	at java.lang.invoke.Invokers.callSiteForm(Invokers.java:377) ~[?:1.8.0_51]
	at java.lang.invoke.Invokers.linkToTargetMethod(Invokers.java:343) ~[?:1.8.0_51]
	at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:314) ~[?:1.8.0_51]
	at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297) ~[?:1.8.0_51]
	at abe.makeRule(SourceFile:22) ~[1.13.2.jar:?]
	at com.mojang.datafixers.DataFix.getRule(DataFix.java:97) ~[datafixerupper-1.0.21.jar:?]
	at com.mojang.datafixers.DataFixerUpper.lambda$getRule$6(DataFixerUpper.java:136) ~[datafixerupper-1.0.21.jar:?]
	at com.mojang.datafixers.DataFixerUpper$$Lambda$398/19497384.apply(Unknown Source) ~[?:?]
	at java.util.Map.computeIfAbsent(Map.java:957) ~[?:1.8.0_51]
	at it.unimi.dsi.fastutil.longs.Long2ObjectMap.computeIfAbsent(Long2ObjectMap.java:606) ~[fastutil-8.2.1.jar:?]
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:530) ~[fastutil-8.2.1.jar:?]
	at it.unimi.dsi.fastutil.longs.Long2ObjectMaps$SynchronizedMap.computeIfAbsent(Long2ObjectMaps.java:295) ~[fastutil-8.2.1.jar:?]
	at com.mojang.datafixers.DataFixerUpper.getRule(DataFixerUpper.java:131) ~[datafixerupper-1.0.21.jar:?]
	at com.mojang.datafixers.DataFixerBuilder.lambda$build$1(DataFixerBuilder.java:72) ~[datafixerupper-1.0.21.jar:?]
	at com.mojang.datafixers.DataFixerBuilder$$Lambda$382/26705850.run(Unknown Source) ~[?:?]
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1618) ~[?:1.8.0_51]
	... 1 more