Pattern-blocks auto-indentation problem.

[Disruptor]

In GNU Emacs 21.1.1 (i386-pc-solaris2.8, X toolkit, Xaw3d scroll bars) of 
2001-12-09 on newton
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: el_GR.ISO8859-7
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: C
  value of $LC_MONETARY: el_GR.ISO8859-7
  value of $LC_NUMERIC: el_GR.ISO8859-7
  value of $LC_TIME: el_GR.ISO8859-7
  value of $LANG: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Steps to reproduce:
0) acquire the 'test_before.sh' attatchment
1) C-x C-f test_before.sh
2) C-x C-p and M-C-\

The resulting script I get is 'test_after.sh':
- Only the 1st case is auto-indented correctly.
- Cases #2 and #3 are 'semi-indented'.
- Cases #4 and #5 are not indented at all.
- Case #6 is semi-indented.

Comments:
tested on emacs:
21.1.1
21.2.3
21.2.93

Recent input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
C-h C-j C-h a b u g <return> <help-echo> <C-tab> <C-tab>
<C-tab> <C-tab> <C-tab> <M-tab> <C-tab> <C-tab> <C-tab>
<C-tab> <C-tab> <C-tab> C-x o C-n C-n C-n C-n C-n C-n
C-n C-n C-n C-n C-n C-n C-n C-n C-n <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo>
<help-echo> <help-echo> C-x k <return> M-x r e p o
<tab> r t <tab> <return>

Recent messages:
(No changes need to be saved)
Auto-saving...done
GNU Emacs 21.1.1 (i386-pc-solaris2.8, X toolkit, Xaw3d scroll bars) of
2001-12-09 on newton
Loading apropos...done
Loading view...done
Type C-x 1 to remove help window.  C-M-v to scroll the help.
Loading etags...done
complete-tag: No tags table loaded; try M-x visit-tags-table
Making completion list...
Loading emacsbug...done
--text follows this line--


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test_before.sh
Description: Text document

test_after.sh
Description: Text document