How odd - I wonder if a commit got lost somewhere. I think this is safe to merge because calling a static method dynamically is permitted in PHP and does not generate any errors or warnings, and the method does not use $this, which is really the only restriction on static methods, so there's no BC break. Since it's documented that it already works that way, that it doesn't is effectively a bug that should be fixed. Anyone calling it statically, as documented, will find they no longer get errors for calling a dynamic method statically, so that makes it a transparent fix rather than a BC break. Thanks for the PR and for spotting this.