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Item7827: With non-threaded Perl, the $SPLIT function of SpreadSheetPlugin fails after splitting on '$empty'

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AppliesTo: Component: Priority: CurrentState: WaitingFor: TargetRelease ReleasedIn
Extension SpreadSheetPlugin Normal Closed TWiki:Main.HaraldJoerg minor 6.1.0

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Applies To:
Current State:
Waiting For:
Target Release:
Released In:


With Perl 5.26.0, 5.26.1 and 5.27.1, a few of the tests for $SPLIT in SpreadSheetPluginTestCases fail like this:

Expected SPLIT
<ul> <li> $SPLIT(, Apple Orange Kiwi)=|Apple, Orange, Kiwi| </li> <li> $SPLIT(-, Apple-Orange-Kiwi)=|Apple, Orange, Kiwi| </li> <li> $SPLIT([-:]$sp*, Apple-Orange: Kiwi)=|Apple, Orange, Kiwi| </li> <li> $SPLIT($empty, Apple)=|A, p, p, l, e| </li> <li>
</li> <li>
</li> </ul>

After some debugging I came to the conclusion that the behaviour of Perl 5.26 is broken and have filed a bug report (https://rt.perl.org/Public/Bug/Display.html?id=132334). Nevertheless, an alternative fix in TWiki is both simple and harmless and should be released.

-- TWiki:Main/HaraldJoerg - 2017-10-20

Investigation by the Perl Porters revealed that this is not about the Perl version. Instead, any non-threaded installation of Perl has this bug, whereas the threaded Perls are fine. I was mislead because I use Debian's vanilla Perl (which is threaded) for 5.20 and 5.24 but built the "newer" versions as unthreaded Perl. I've modified the summary accordingly.

In any case, removing the /o modifier is an appropriate fix (coming soon).

-- TWiki:Main/HaraldJoerg - 2017-10-21

Summary With non-threaded Perl, the $SPLIT function of SpreadSheetPlugin fails after splitting on '$empty'
ReportedBy TWiki:Main.HaraldJoerg
Codebase ~twiki4
SVN Range TWiki-6.0.2-trunk, Thu, 17 Aug 2017, build 30373
AppliesTo Extension
Component SpreadSheetPlugin
Priority Normal
CurrentState Closed
WaitingFor TWiki:Main.HaraldJoerg
Checkins TWikirev:30401
TargetRelease minor
ReleasedIn 6.1.0
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Topic revision: r5 - 2018-07-17 - PeterThoeny
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