ByteArrayView - ArrayIndexOutOfBoundsException

[fasol2002]

While writing via the FileOutputStream -> BufferedOutputStream -> XZOutputStream (Level 6) I got repeatedly the following error. Unfortunately I can not disclose the content of the stream but those where marshalled json objects.
java.lang.ArrayIndexOutOfBoundsException: Index 12853514 out of bounds for length 12853514 at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:177) ~[?:?] at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:174) ~[?:?] at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:62) ~[?:?] at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) ~[?:?] at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) ~[?:?] at java.base/java.lang.invoke.VarHandleByteArrayAsLongs$ArrayHandle.index(VarHandleByteArrayAsLongs.java:103) ~[?:?] at java.base/java.lang.invoke.VarHandleByteArrayAsLongs$ArrayHandle.get(VarHandleByteArrayAsLongs.java:120) ~[?:?] at org.tukaani.xz.common.ByteArrayView.getLongLE(ByteArrayView.java:97) ~[xz-1.11.jar:1.11] at org.tukaani.xz.lz.UnalignedLongLEMatchLengthFinder.getLen(UnalignedLongLEMatchLengthFinder.java:37) ~[xz-1.11.jar:1.11] at org.tukaani.xz.lz.MatchLength.getLen(MatchLength.java:88) ~[xz-1.11.jar:1.11] at org.tukaani.xz.lz.LZEncoder.getMatchLen(LZEncoder.java:335) ~[xz-1.11.jar:1.11] at org.tukaani.xz.lzma.LZMAEncoderNormal.getNextSymbol(LZMAEncoderNormal.java:127) ~[xz-1.11.jar:1.11] at org.tukaani.xz.lzma.LZMAEncoder.encodeSymbol(LZMAEncoder.java:257) ~[xz-1.11.jar:1.11] at org.tukaani.xz.lzma.LZMAEncoder.encodeForLZMA2(LZMAEncoder.java:223) ~[xz-1.11.jar:1.11] at org.tukaani.xz.LZMA2OutputStream.flush(LZMA2OutputStream.java:229) ~[xz-1.11.jar:1.11] at org.tukaani.xz.BlockOutputStream.flush(BlockOutputStream.java:99) ~[xz-1.11.jar:1.11] at org.tukaani.xz.XZOutputStream.flush(XZOutputStream.java:497) ~[xz-1.11.jar:1.11]

[Larhzu]

Thanks for the report! Could you tell the processor instruction set (x86-64, ARM64, ...), operating system, and Java version? Try setting the property "org.tukaani.xz.MatchLengthFinder=Basic", for example, on the command line like this: java -Dorg.tukaani.xz.MatchLengthFinder=Basic ... Then it won't use the UnalignedLongLEMatchLengthFinder class, so if it fails, at least the error message will be different. If it works, then it might be a clue what kind of bug this is. If possible, also test on a different computer. This would ensure that there is no hardware issue like bad RAM.

[Larhzu]

It could also help to enable assertions ("java -ea:org.tukaani.xz..." *including* the three dots at the end). An assertion might fail before the out of bounds exception is thrown.