Fix unlikely but possible race in `WeakValueDictionary`
It may happen that value in `valueArray` could have been already
collected by the GC but #clearDeadSlots have not yet been called.
When this happened, `#at:ifAbsentPut:` returned tombstone rather
than updating the dictionary with value from block.
This commit fixes this by checking whether `valueArray` contain
the tombstone and if so, clearing up the dead slots and restarting
the operation. HTH.
"
COPYRIGHT (c) 2003 by eXept Software AG
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
"{ Package: 'stx:libbasic' }"
DomainError subclass:#ImaginaryResultError
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'Kernel-Exceptions-Errors'
!
!ImaginaryResultError class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2003 by eXept Software AG
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
!
documentation
"
Raised by square root functions when the functions-arg is negative,
so that the result would be imaginary.
For example,
-1 sqrt
Can be caught (see Complex >> trapImaginary) to automagically convert to Complex)
"
! !
!ImaginaryResultError class methodsFor:'initialize'!
initialize
NotifierString := 'imaginary result'.
! !
!ImaginaryResultError class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/libbasic/ImaginaryResultError.st,v 1.3 2014-06-10 10:13:28 cg Exp $'
! !
ImaginaryResultError initialize!