Crashing whilst initializing

Minecraft Crash Report -------- Minecraft Crash Report ----// This doesn't make any sense!
Time: 4/12/20 9:38 PMDescription: Initializing game
java.lang.NoClassDefFoundError: java/io/BufferedReader$1 at java.io.BufferedReader.lines(BufferedReader.java:562) at dbr.a(SourceFile:245) at dbr.<init>(SourceFile:216) at dbn.<init>(SourceFile:394) at net.minecraft.client.main.Main.main(SourceFile:166)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Render threadStacktrace: at java.io.BufferedReader.lines(BufferedReader.java:562) at dbr.a(SourceFile:245) at dbr.<init>(SourceFile:216) at dbn.<init>(SourceFile:394)
– Initialization --Details:Stacktrace: at net.minecraft.client.main.Main.main(SourceFile:166)
– System Details --Details: Minecraft Version: 1.15.2 Minecraft Version ID: 1.15.2 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_51, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1278831832 bytes (1219 MB) / 1509949440 bytes (1440 MB) up to 2147483648 bytes (2048 MB) CPUs: 4 JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Launched Version: 1.15.2 Backend library: LWJGL version 3.2.2 build 10 Backend API: NO CONTEXT GL Caps:  Using VBOs: Yes Is Modded: Probably not. Jar signature remains and client brand is untouched. Type: Client (map_client.txt) CPU: <unknown>