https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82995
Dominique d'Humieres <dominiq at lps dot ens.fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2017-11-14 Ever confirmed|0 |1 --- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- IMO the code is invalid: you cannot call my_sum with only one argument. I get a segfault for all the revision I have tested from 4.8 up to trunk (8.0), except with my instrumented trunk for which I get 0. I am a little bit surprised that the mismatch between caller and callee is not detected, but I think a compiler does have to (I did not look at the standard legalese).