1) Open attachment 59233 [details] in a dbgutil build
2) click on "reports" in the left pane
3) in the lower right pane, double-click on "Bericht1"
4) Puzzling debug warning:


SvNumerFormatter::ImpGenerateCL: locales don't match:
fr-LU requested
fr-LU loaded

(never mind it crashes after that, that's another bug)

I did a break on that place:

            if ( rLoadedLocale != maLanguageTag )
            {
                OUString aMsg("SvNumberFormatter::ImpGenerateCL: locales don't match:");
                LocaleDataWrapper::outputCheckMessage( xLocaleData->appendLocaleInfo( aMsg ));
            }

(gdb) print rLoadedLocale
$3 = (const LanguageTag &) @0x7fffa67afd90: {
  maLocale = {
    Language = "fr", 
    Country = "LU", 
    Variant = ""
  }, 
  maBcp47 = "fr-LU", 
  maCachedLanguage = "", 
  maCachedScript = "", 
  maCachedCountry = "", 
  mpImplLangtag = 0x0, 
  mnLangID = 1023, 
  meIsValid = LanguageTag::DECISION_DONTKNOW, 
  meIsIsoLocale = LanguageTag::DECISION_DONTKNOW, 
  meIsIsoODF = LanguageTag::DECISION_DONTKNOW, 
  meIsLiblangtagNeeded = LanguageTag::DECISION_DONTKNOW, 
  mbSystemLocale = false, 
  mbInitializedBcp47 = true, 
  mbInitializedLocale = true, 
  mbInitializedLangID = false, 
  mbCachedLanguage = false, 
  mbCachedScript = false, 
  mbCachedCountry = false, 
  mbIsFallback = false
}
(gdb) print maLanguageTag
$4 = {
  maLocale = {
    Language = "fr", 
    Country = "LU", 
    Variant = ""
  }, 
  maBcp47 = "", 
  maCachedLanguage = "", 
  maCachedScript = "", 
  maCachedCountry = "", 
  mpImplLangtag = 0x0, 
  mnLangID = 5132, 
  meIsValid = LanguageTag::DECISION_DONTKNOW, 
  meIsIsoLocale = LanguageTag::DECISION_DONTKNOW, 
  meIsIsoODF = LanguageTag::DECISION_DONTKNOW, 
  meIsLiblangtagNeeded = LanguageTag::DECISION_DONTKNOW, 
  mbSystemLocale = true, 
  mbInitializedBcp47 = false, 
  mbInitializedLocale = true, 
  mbInitializedLangID = true, 
  mbCachedLanguage = false, 
  mbCachedScript = false, 
  mbCachedCountry = false, 
  mbIsFallback = false
}


It seems it is two different fr_LU in some way??? I traced the equality test, basically one gives an empty bcp47 and the other gives fr_LU.