https://issues.dlang.org/show_bug.cgi?id=13662

          Issue ID: 13662
           Summary: @safe pure @nogc nothrow findRoot
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: Phobos
          Assignee: nobody@puremagic.com
          Reporter: ilyayaroshenko@gmail.com

findRoot can not accept @safe pure @nogc nothrow delegates.

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