http://bugzilla.suse.com/show_bug.cgi?id=1172411 Bug ID: 1172411 Summary: gcc 10 produces bogus stringop-overflow warnings Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: PowerPC-64 OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Other Assignee: screening-team-bugs@suse.de Reporter: brogers@suse.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- Created attachment 838431 --> http://bugzilla.suse.com/attachment.cgi?id=838431&action=edit test program demonstrating erroneous warnings I encountered this problem when building the openSUSE qemu package on the ppc64le architecture with the recently introduced gcc10. I took the time to extract out the relevant code into a test.c file which demonstrates the issue. See attached test.c source file. For reference, here is output from executing: gcc-10 -c -Wall -O2 test.c on a ppc64 host: test.c: In function ‘reset_tlb_mmu_ways56.constprop.isra’: test.c:88:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 88 | entry[6][ei].asid = 1; | ~~~~~~~~~~~~~~~~~~^~~ test.c:89:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 89 | entry[6][ei].attr = 3; | ~~~~~~~~~~~~~~~~~~^~~ test.c:88:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 88 | entry[6][ei].asid = 1; | ~~~~~~~~~~~~~~~~~~^~~ test.c:89:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 89 | entry[6][ei].attr = 3; | ~~~~~~~~~~~~~~~~~~^~~ test.c:88:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 88 | entry[6][ei].asid = 1; | ~~~~~~~~~~~~~~~~~~^~~ test.c:89:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 89 | entry[6][ei].attr = 3; | ~~~~~~~~~~~~~~~~~~^~~ test.c:88:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 88 | entry[6][ei].asid = 1; | ~~~~~~~~~~~~~~~~~~^~~ test.c:89:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 89 | entry[6][ei].attr = 3; | ~~~~~~~~~~~~~~~~~~^~~ test.c:88:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 88 | entry[6][ei].asid = 1; | ~~~~~~~~~~~~~~~~~~^~~ test.c:89:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 89 | entry[6][ei].attr = 3; | ~~~~~~~~~~~~~~~~~~^~~ test.c:88:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 88 | entry[6][ei].asid = 1; | ~~~~~~~~~~~~~~~~~~^~~ test.c:89:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 89 | entry[6][ei].attr = 3; | ~~~~~~~~~~~~~~~~~~^~~ test.c:88:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 88 | entry[6][ei].asid = 1; | ~~~~~~~~~~~~~~~~~~^~~ test.c:89:31: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=] 89 | entry[6][ei].attr = 3; | ~~~~~~~~~~~~~~~~~~^~~ -- You are receiving this mail because: You are on the CC list for the bug.