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calling toArray on an existing Array crashes at runtime #668

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scabug opened this issue Mar 21, 2008 · 3 comments
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calling toArray on an existing Array crashes at runtime #668

scabug opened this issue Mar 21, 2008 · 3 comments
Milestone
2.7.1

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@scabug
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scabug commented Mar 21, 2008

Since nulls are not allowed to be unboxed to values, the following code fails (causing the scrip tests to fail as well).

  val chrs: Array[Char] = ...
  chrs.toArray
scala> val ints = Array(1, 2, 3)
ints: Array[Int] = Array(1, 2, 3)

scala> ints.toArray
java.lang.ClassCastException: null is no Int value
        at scala.runtime.BoxesRunTime.unboxToInt(Unknown Source)
        at scala.runtime.BoxedAnyArray.unbox(BoxedAnyArray.scala:97)
        at scala.runtime.BoxedAnyArray.unbox(BoxedAnyArray.scala:80)
        at scala.runtime.BoxedAnyArray.adapt(BoxedAnyArray.scala:205)
        at scala.runtime.BoxedAnyArray.copyFrom(BoxedAnyArray.scala:236)
        at scala.Array$$.copy(Arr...
@scabug
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scabug commented Mar 21, 2008

Imported From: https://issues.scala-lang.org/browse/SI-668?orig=1
Reporter: @dragos

@scabug
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scabug commented Mar 21, 2008

@dubochet said:
Fixed by reverting change in r14428. But issue #602 is broken again.

I wonder if fixing the array copy mechanism wouldn't be better. The fact that it has to unbox each null value in the array to Integer(0) before overwriting it with the copied value just seems wrong.

I reassign this bug to devteam so that the Array expert, whoever that is, can have a look.

If you choose to correct copy, please reapply fix for #602 that is commented out in scala.runtime.BoxesRunTime in the Java and CLDC libraries.

@scabug
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scabug commented Jan 14, 2009

@odersky said:
Milestone 2.7.1 deleted

@scabug scabug closed this as completed May 18, 2011
@scabug scabug added this to the 2.7.1 milestone Apr 6, 2017
This was referenced Apr 6, 2017
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