https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86655
--- Comment #2 from Matthias Kretz <kretz at kde dot org> --- http://eel.is/c++draft/c.math#sf.cmath-1.3 might be the reason why `m <= l` is enforced. But unless I'm confused the footnote on "mathematically defined" tells us it should work: - "(a) if it is explicitly defined for that set of argument values" - does not hold - "(b) if its limiting value exists and does not depend on the direction of approach" - this holds, no?
