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Item7617: Add range check in SUBSTRING

Item Form Data

AppliesTo: Component: Priority: CurrentState: WaitingFor: TargetRelease ReleasedIn
Extension SpreadSheetPlugin Normal Closed   patch 6.0.2

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


The Apache error log may have entries if an out of range index is specified for the SUBSTRING function.

Test case:


  • $SUBSTRING(abcdefg,7,5)=|g|
  • $SUBSTRING(abcdefg,8,5)=||
  • $SUBSTRING(abcdefg,-7,2)=|ab|
  • $SUBSTRING(abcdefg,-8,2)=||


  • $SUBSTRING(abcdefg,7,5)=|g| -- within range
  • $SUBSTRING(abcdefg,8,5)=|| -- out of range
  • $SUBSTRING(abcdefg,-7,2)=|ab| -- within range
  • $SUBSTRING(abcdefg,-8,2)=|| -- out of range

-- TWiki:Main/PeterThoeny - 2015-02-25

Summary Add range check in SUBSTRING
ReportedBy TWiki:Main.PeterThoeny
Codebase ~twiki4, 6.0.1
SVN Range TWiki-6.0.1-trunk, Wed, 18 Feb 2015, build 28744
AppliesTo Extension
Component SpreadSheetPlugin
Priority Normal
CurrentState Closed

Checkins TWikirev:28759 TWikirev:28760 TWikirev:28761 TWikirev:28762
TargetRelease patch
ReleasedIn 6.0.2
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Topic revision: r7 - 2016-01-22 - PeterThoeny
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