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bug#8219: Effect of deletions on indirect buffers (Bug#8219)

From: Stefan Monnier
Subject: bug#8219: Effect of deletions on indirect buffers (Bug#8219)
Date: Sat, 12 Mar 2011 15:47:05 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

> It follows that BUF_PT, when used on other than the current buffer
> should update PT if necessary, if that buffer is an indirect buffer,
> before returning the value.  And the same with BUF_BEGV, BUF_ZV, etc.

> Right?

Yes.  At least that was my conclusion last time we bumped into such
a bug.  I even added a comment in buffer.h about it:

/* !!!FIXME:  all the BUF_BEGV/BUF_ZV/BUF_PT macros are flawed:
   on indirect (or base) buffers, that value is only correct if that buffer
   is the current_buffer, or if the buffer's text hasn't been modified (via
   an indirect buffer) since it was last current.  */


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