Thread: pgsql: Work around spurious compiler warning in inet operators
Work around spurious compiler warning in inet operators gcc 12+ has complaints like the following: ../../../../../pgsql/src/backend/utils/adt/network.c: In function 'inetnot': ../../../../../pgsql/src/backend/utils/adt/network.c:1893:34: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 1893 | pdst[nb] = ~pip[nb]; | ~~~~~~~~~^~~~~~~~~~ ../../../../../pgsql/src/include/utils/inet.h:27:23: note: at offset -1 into destination object 'ipaddr' of size 16 27 | unsigned char ipaddr[16]; /* up to 128 bits of address */ | ^~~~~~ ../../../../../pgsql/src/include/utils/inet.h:27:23: note: at offset -1 into destination object 'ipaddr' of size 16 This is due to a compiler bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104986 It has been a year since the bug has been reported without getting fixed. As the warnings are verbose and use of gcc 12 is becoming more common, it seems worth working around the bug. Particularly because a simple reformulation of the loop condition fixes the issue and isn't any less readable. Author: Tom Lane <tgl@sss.pgh.pa.us> Author: Andres Freund <andres@anarazel.de> Discussion: https://postgr.es/m/144536.1648326206@sss.pgh.pa.us Backpatch: 11- Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/0dc40196f27531ab30bbbc516df9894edc276d6e Modified Files -------------- src/backend/utils/adt/network.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)