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Platform/s:

Linux/Wayland, Linux/X11
Story Points:
5
Commits:
d778d17b9 (dev), e04f7d0d2 (dev), ea806fa3f (dev), c4b2d2389 (6.7), e78b7e701 (6.7), 1119a3775 (6.7)
Sprint:
Foundation Sprint 105, Foundation Sprint 106

Qt.Locale.ShortFromat is set to be default to displayed in 24 hour format in zh_TW.UTF-8 locale, but it is somehow prefixed with a "B"

steps:

open qtcreator
create tutorial project from /usr/share/doc/qt6/examples/tutorials/alarms
go to the build directory
run it with LC_ALL=zh_TW.UTF-8 ./alarm method and check that there is the "B" prefix.

Additional information:

It is originally found as in Plasma6's lockscreen as well as the SDDM display manager greeter with Breeze theme.
It is also confirmed on a fresh-installed opensuse Tumbleweed system, which defaults to plasma6+qt6.
this is not the minimum proof of concept, but it does show the bug.

relates to

QTBUG-81056 Add QDateTimeFormat based on CLDR's format strings

QTBUG-79902 QLocale: make fuller and more faithful use of the CLDR data

QTBUG-56923 V4's Date claims to extend toLocale*String() in ways expressly forbidden by ECMA-262

For Gerrit Dashboard: QTBUG-123872
#	Subject	Branch	Project	Status	CR	V
552842,4	Tidy up macToQtFormat() in Darwin system locale backend	dev	qt/qtbase	Status: MERGED	+2	0
552843,5	Rewrite CLDR-ingestion's date-time format conversion	dev	qt/qtbase	Status: MERGED	+2	0
552844,7	Cope with CLDR's "day period" format specifiers	dev	qt/qtbase	Status: MERGED	+2	0
559706,2	Tidy up macToQtFormat() in Darwin system locale backend	6.7	qt/qtbase	Status: MERGED	+2	0
559707,2	Rewrite CLDR-ingestion's date-time format conversion	6.7	qt/qtbase	Status: MERGED	+2	0
559708,2	Cope with CLDR's "day period" format specifiers	6.7	qt/qtbase	Status: MERGED	+2	0