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:alnum: broken?

From: Stephen Leake
Subject: :alnum: broken?
Date: Fri, 21 Feb 2020 10:58:26 -0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (windows-nt)

I'm attempting to generalize the regular expressions in ada-mode to
handle utf-8; some are currently limited to ASCII.

However, :alnum: appears to be broken:

(let ((text "01abCDE")
      res1 res2)
  (string-match "[:alnum:]+" text)
  (setq res1 (match-string 0 text))
  (string-match "[0-9a-zA-Z]+" text)
  (setq res2 (match-string 0 text))
  (list res1 res2))


("a" "01abCDE")

I'm running emacs master on Windows 8 x64.

I'm guessing this might be affected by the font: (frame-parameter nil 'font)

On the other hand, running in a Debian testing VM on the same machine
gives the same results, and the font is
"-PfEd-DejaVu Sans Mono-normal-normal-normal-*-11-*-*-*-m-0-iso10646-1"

What am I missing?

-- Stephe

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