[Bug middle-end/49905] Better sanity checking on sprintf src & dest to produce warning for dodgy code ?

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49905

--- Comment #22 from Martin Sebor <msebor at gcc dot gnu.org> ---
I've raised bug 77683 for the ICE on %lf.