Public bug reported:
Expected behavior:
int test = 5;
wchat_t* buff = NULL;
size_t strlen = swprintf(buff ,0 , L"%d", test);
In this instance I would expect strlen = 1;
-----------------------------------
Actual behavior:
strlen = 18446744073709551615
-----------------------------------
Extra Info:
apt-cache policy libc6
libc6:
Installed: 2.23-0ubuntu5
Candidate: 2.23-0ubuntu5
Version table:
*** 2.23-0ubuntu5 500
500 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
100 /var/lib/dpkg/status
2.23-0ubuntu3 500
500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
-----------------------------------
lsb_release -rd
Description: Ubuntu 16.04.1 LTS
Release: 16.04
** Affects: glibc (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1658715
Title:
swprintf return incorrect number of characters written when writing
to NULL and 0 length
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