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Bug
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Resolution: Fixed
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1.20.4, 24w03b, 24w06a
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None
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Java 21
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Confirmed
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Crash
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Very Important
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Platform
Command:
/give @p minecraft:player_head{SkullOwner:{Properties:{textures:[{Value:"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"}]}}}
Put it in the command block and run it.
Then your client will crash.
Command interpretation: give the player a skin message URL is BASE64 encoded image head.
Log:
[19:53:18] [Render thread/ERROR]: Reported exception thrown! y: Rendering item at ewu.a(SourceFile:591) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at ewu.a(SourceFile:556) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at ewu.a(SourceFile:552) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at ewt.a(SourceFile:1246) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at ewt.a(SourceFile:580) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at ewt.a(SourceFile:232) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at fta.a(SourceFile:912) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at evi.d(SourceFile:1327) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at evi.f(SourceFile:888) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at net.minecraft.client.main.Main.main(SourceFile:265) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] Caused by: java.lang.IllegalArgumentException: Invalid URL 'data:image/png;base64,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 ' at com.mojang.authlib.yggdrasil.TextureUrlChecker.isAllowedTextureDomain(TextureUrlChecker.java:33) ~[authlib-6.0.52.jar:?] at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.unpackTextures(YggdrasilMinecraftSessionService.java:150) ~[authlib-6.0.52.jar:?] at gfn$1.a(SourceFile:55) ~[1.20.4-%e5%8e%9f%e7%89%88.jar:?] at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768) ~[?:?] at java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1760) ~[?:?] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387) ~[?:?] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312) ~[?:?] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843) ~[?:?] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808) ~[?:?] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188) ~[?:?]
100% will crash the player client, effective in the server.