Your message dated Fri, 24 Dec 2021 18:05:24 +0100 with message-id <[email protected]> and subject line close: upstream bugs or too old has caused the Debian Bug report #808861, regarding clang: Recommends bad format specifier for USHRT_MAX constant to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 808861: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808861 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: clang Version: 1:3.6-32 Severity: minor Dear Maintainer, Consider the following program: ``` #include <limits.h> #include <stdio.h> int main (void) { printf ("%hu\n", USHRT_MAX); return 0; } ``` If I compile this with clang (tested with -std=c11 but might be present with other standards), I will get a warning about using the %hu format specifier, since the definition of USHRT_MAX is identified as an int (from a quick check of the header file, it uses arithmetic to determine it). However, the minimum size of an int is 16 bits, as is an unsigned short. That being the case, using a %d specifier as the warning recommends could cause bad output. If both int and unsigned short are of the same length on an implementation, then that format specifier would read an unsigned 16-bit integer value as a signed 16-bit integer value, resulting in incorrect output. On implementations like mine where int is 32 bits wide, this wouldn't be harmful, but the standard says that this could technically be a problem. -- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (500, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 4.3.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages clang depends on: ii clang-3.6 1:3.6.2-3 clang recommends no packages. clang suggests no packages. -- no debconf information Happy Hacking, David E. McMackins II Associate, Free Software Foundation (#12889) www.mcmackins.org www.delwink.com www.gnu.org www.fsf.org
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