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| From: | Dmitry Gutov |
| Subject: | bug#18504: 24.3.93; posn-at-point intermittently returns wrong value for a valid buffer position |
| Date: | Fri, 19 Sep 2014 17:29:31 +0400 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.1.1 |
On 09/19/2014 05:12 PM, Eli Zaretskii wrote:
Wouldn't setting a conditional breakpoint help?Conditional breakpoint where?
In the "call a function" routine, maybe? If the function is "posn-at-point", and if its returned X coord is zero, halt!
Doing it in Elisp doesn't seem to produce the desired result, because edebug doesn't exactly stop Emacs in place.
With these issues, the only way to find the bug is to step through the offending code _before_ it produces the wrong values. So we need a condition that happens at the beginning of that code, not where it produces the final wrong results.
If `posn-at-point' is itself stateless (and doesn't modify any relevant caches), why not call it again at that point?
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