Bug 6222 – A problem with iota() using size_t

With DMD 2.053 this apparently goes in infinite loop: import std.range; void main() { string s; foreach (i; iota(0, s.length, 3)) {} } What I expect: the foreach loop to loop zero times instead. See also bug 4603

Commits pushed to master at https://github.com/D-Programming-Language/phobos https://github.com/D-Programming-Language/phobos/commit/6b92abb0449e6af80f68beb9fa1311346397bfaf fix Issue 6222 - A problem with iota() using size_t If the common type of begin and end is unsigned and end is 0 the private member pastEnd ends up being unsigned.max due to "pastEnd - 1" (used to make end not inclusive) which results in iota behaving incorrectly. A simple change to always make an empty range when begin==end prevents this. Also fixed and clarified the documentation. https://github.com/D-Programming-Language/phobos/commit/b1252f35afc019c37f334d274c257a25a4e0035f Merge pull request #547 from eco/iota-unsigned-odd fix Issue 6222 - A problem with iota() using size_t