On Fri, 23 Mar 2018, Vadim Zeitlin wrote: > Yet they definitely do. I may not have a SSCCE of it, but building 4 > versions of the same object file/executable that differ only in the warning > options used: > > 1. Both -Wall and -Woverloaded-virtual > 2. Only -Wall > 3. Only -Woverloaded-virtual > 4. Neither Since -Wall enables many individual warning options (you can see the list by supplying -Wall -Q --help=warnings on gcc command line), to investigate further you can try to find a minimal subset of -Wall that still exhibits the issue. > Would you have any idea about how could this be explained? By all indications this is an unusual compiler bug. Please file a report in GCC Bugzilla if you can, even if the testcase has a large line count. Hope that helps. Alexander
