More often than not, the tools submodule ( https://github.com/D-Programming-Language/tools) will not build on git master. So I'm wondering whether it's even being tested before pushing commits.
The error I have now is with ddemangle: std.md5 is scheduled for deprecation. Please use std.digest.md instead phobos/std/regex.d(6706): Error: template D main.__lambda3 does not match any function template declaration. Candidates are: ddemangle.d(57): ddemangle.main.__lambda3(__T2)(a) (this is the line: writeln(replace!((a) => demangle(a.hit))(line, r));)
