[Issue 20255] New: undefined identifier ascii in package std

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20255

          Issue ID: 20255
           Summary: undefined identifier ascii in package std
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: critical
          Priority: P1
         Component: phobos
          Assignee: nobody at puremagic.com
          Reporter: mike.pryadko at gmail.com

Created attachment 1762
  --> https://issues.dlang.org/attachment.cgi?id=1762&action=edit
build log with errors in phobos

I'v just install dmd & dub and try to run dlangGUI, but it fails with few
errors about /usr/include/dmd/phobos/std/functional.d-mixin-215 and
/usr/include/dmd/phobos/std/algorithm/iteration.d
Full log is attached

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