https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80892
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2017-05-26 Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- Confirmed: $ cat t.c && gcc -S -Wfloat-conversion t.c void f (char); void g (unsigned long x) { f (x); } t.c: In function ‘g’: t.c:5:6: warning: conversion from ‘long unsigned int’ to ‘char’ may change value [-Wfloat-conversion] f (x); ^ The conversion changes were committed in r248431. They weren't intended to change how warnings are controlled so this is a bug.