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From: "fweimer at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug locale/27996] New: setlocale should fail if the required gconv
 module is missing
Date: Fri, 18 Jun 2021 14:29:49 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27996

            Bug ID: 27996
           Summary: setlocale should fail if the required gconv module is
                    missing
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: locale
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
  Target Milestone: ---

setlocale succeeds:

$ LC_ALL=3Dlv_LV locale
LANG=3D
LC_CTYPE=3D"lv_LV"
LC_NUMERIC=3D"lv_LV"
LC_TIME=3D"lv_LV"
LC_COLLATE=3D"lv_LV"
LC_MONETARY=3D"lv_LV"
LC_MESSAGES=3D"lv_LV"
LC_PAPER=3D"lv_LV"
LC_NAME=3D"lv_LV"
LC_ADDRESS=3D"lv_LV"
LC_TELEPHONE=3D"lv_LV"
LC_MEASUREMENT=3D"lv_LV"
LC_IDENTIFICATION=3D"lv_LV"
LC_ALL=3Dlv_LV

The locale uses a somewhat unusual charset:

# LC_ALL=3Dlv_LV locale -k charmap
charmap=3D"ISO-8859-13"

But the charset is not installed:

# iconv -f UTF-8 -t ISO-8859-13
iconv: failed to start conversion processing

So mbstowcs fails to work.

Pointed out by Victor Stinner here:
https://bugzilla.redhat.com/show_bug.cgi?id=3D1973663#c11

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