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bug#23221: 25.0.92; Crash in redisplay during isearch

From: Andy Moreton
Subject: bug#23221: 25.0.92; Crash in redisplay during isearch
Date: Tue, 5 Apr 2016 18:06:23 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.7.1

On 05/04/2016 5:00 PM, Eli Zaretskii wrote:
Cc: address@hidden
From: Andy Moreton <address@hidden>
Date: Tue, 5 Apr 2016 16:42:59 +0100

Feel free to close this, as I can't reproduce it, and I don't have the crashed
session open in gdb any more.

Done.  Next time something like this happen, please try at least to
establish the values directly involved in the assertion violation,
like the character and byte position in this case.  (Did that a buffer
include non-ASCII characters, btw?)

Sorry - I did intend to get a full backtrace, however MSYS2 gdb does not support readline properly, so it is all too easy to get it confused :-(

The buffer was a listing of the Cygwin mailing list at gmane.org, so included some non-ASCII characters in names, and some unicode box drawing chars in the threading tree:

(setq gnus-sum-thread-tree-single-indent   "□ "    ; U+25A1
      gnus-sum-thread-tree-false-root      "▷ "    ; U+25B7
      gnus-sum-thread-tree-root            "▶ "    ; U+25B6
      gnus-sum-thread-tree-vertical        "│ "    ; U+2502
      gnus-sum-thread-tree-leaf-with-other "├─□ "  ; U+251C U+2500 U+25A1
      gnus-sum-thread-tree-single-leaf     "╰─□ "  ; U+2570 U+2500 U+25A1
      gnus-sum-thread-tree-indent          "  ")

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