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From: "poenitz at htwm dot de" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug python/13111] "-var-update" command incorrect when using pretty
 printers
Date: Sat, 17 Nov 2012 19:16:00 -0000
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http://sourceware.org/bugzilla/show_bug.cgi?id=13111

Andre' Poenitz <poenitz at htwm dot de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |poenitz at htwm dot de

--- Comment #1 from Andre' Poenitz <poenitz at htwm dot de> 2012-11-17 19:16:17 UTC ---
-var-update was created to keep track of standard situations, like watching
data members of C style structures.

They can conceptually not work for "complex" pretty-printing in the presence of
arbitrary changes to the environment like the value of global variables or the
return value of function calls.

The only safe approach for a gdb frontend is to not rely on -var-update (or
varobj at all for that matter) and re-run all pretty printers everytime
something could have changed.

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