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2026-05-22
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| 17:43 | • Closed ticket [082a30e4]: Error in ::tk::ScrollByUnits plus 7 other changes artifact: 153e168d user: nemethi | |
| 17:20 | Fix for ticket [082a30e45a]: Error in ::tk::ScrollByUnits. check-in: 2eb7e410 user: csaba tags: core-9-0-branch | |
| 17:11 | Fix for ticket [082a30e45a]: Error in ::tk::ScrollByUnits. check-in: cca7d076 user: csaba tags: trunk, main | |
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2026-05-21
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| 15:57 | • Ticket [082a30e4] Error in ::tk::ScrollByUnits status still Open with 5 other changes artifact: ab1e8d35 user: nemethi | |
| 10:18 | • New ticket [082a30e4]. artifact: e6a9bcec user: SVIDevelopment | |
| Ticket UUID: | 082a30e45a101c8c7776af1075a6bd2813e13709 | |||
| Title: | Error in ::tk::ScrollByUnits | |||
| Type: | Bug | Version: | 9.0.2 | |
| Submitter: | SVIDevelopment | Created on: | 2026-05-21 10:18:35 | |
| Subsystem: | 16. [scrollbar] | Assigned To: | nemethi | |
| Priority: | 5 Medium | Severity: | Minor | |
| Status: | Closed | Last Modified: | 2026-05-22 17:43:20 | |
| Resolution: | Fixed | Closed By: | nemethi | |
| Closed on: | 2026-05-22 17:43:20 | |||
| Description: |
We received a bug report about an error in ::tk::ScrollByUnits:
can't read "Priv(xEvents)": no such element in array
while executing
"if {($Priv(xEvents) + $Priv(yEvents) > 10) &&
($axis eq "x" && $Priv(xEvents) < $Priv(yEvents) ||
$axis eq "y" && $Priv(yEvents) < $Priv(xEvents)..."
(procedure "tk::ScrollByUnits" line 14)
We have not been able to reproduce it ourselves, but looking at the logic it seems like the <Enter> events was not (yet) resolved when ::tk::ScrollByUnits was entered. So a valid fix seems to be to make sure both "events" variables are initialized before doing the if statement, by adding
set otherAxis [expr {$axis eq "x" ? "y" : "x"}]
if {![info exists Priv(${otherAxis}Events)]} {
set Priv(${otherAxis}Events) 0
}
The platform is Windows.
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| User Comments: |
nemethi (claiming to be Csaba Nemethi) added on 2026-05-22 17:43:20:
Fixed by commits [cca7d076] (main) and [2eb7e410] (core-9-0-branch). In addition, guarded against potential similar problems related to entry and notebook widgets. nemethi (claiming to be Csaba Nemethi) added on 2026-05-21 15:57:02: Assigned to myself. The fix is coming soon. | |||