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java.lang.ArrayIndexOutOfBoundsException: 256 with scala-asm #9391

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scabug opened this issue Jul 11, 2015 · 3 comments
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java.lang.ArrayIndexOutOfBoundsException: 256 with scala-asm #9391

scabug opened this issue Jul 11, 2015 · 3 comments
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backend won't fix

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@scabug
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scabug commented Jul 11, 2015

I am attempting to compile a generated Scala project (its a wsdl SOAP API which generates .scala sources, which are then compiled), and I am getting the following error

https://gist.github.com/mdedetrich/069a9b506eb6b7ff01ed

One important thing to note, is that the generated scala sources are huge (it generates 3891 scala sources, some of those files end up having > 100k lines of source code). To generate the Scala sources themselves, it takes around 2-3 hours, and to compile the sources it takes around 5 hours (with the following SBT arguments so it doesn't run out of memory)

-J-Xmx8G
-J-XX:MaxMetaspaceSize=1G
-J-XX:+CMSClassUnloadingEnabled
-J-XX:+UseConcMarkSweepGC

There is a github issue for this on scala-xb (eed3si9n/scalaxb#234 (comment)), however this appears to be strictly a scala compiler problem, probably due to a corner case of compiling such a huge number of sources.

Note that I do have the .wsdl sources/SBT project in question, however I can't share it publicly because its a private API. I can however provide a private link to download the SBT project to whoever is working on the issue.
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scabug commented Jul 11, 2015

Imported From: https://issues.scala-lang.org/browse/SI-9391?orig=1
Reporter: Matthew de Detrich (mdedetrich)
Affected Versions: 2.11.7

@scabug
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scabug commented Jul 11, 2015

Matthew de Detrich (mdedetrich) said (edited on Jul 11, 2015 3:15:13 AM UTC):
Managed to find the issue in the scala-asm source code, its here

https://github.com/scala/scala-asm/blob/master/src/main/java/scala/tools/asm/ClassWriter.java#L611

The array size is being statically set to 256, which is probably too small for the size of the Scala code that is being compiled, maybe making it larger/allowing it to be set/ using something like Integer.MAX_VALUE-10 would solve the problem?

EDIT: Have also added an issue on scala-asm github, link is here scala/scala-asm#8

@scabug
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scabug commented Jul 13, 2015

@retronym said:
Thanks for reporting.

Let's continue the discussion over on the scala-asm issue.

@scabug scabug closed this as completed Jul 13, 2015
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