On Mon, 09 Jun 2008 01:34:09 -0500, michel wrote:

> I had excatly the same problem with a 32 bits mandriva 2008.1 running on
> a single core sempron with 1 Go RAM, but because I did not have any need
> to upgrade, I came back to mandriva 2007.1.
> 
>> This may not be the appropriate forum for this problem but I have
>> exhausted other avenues of enquiry, including Bugzilla.  The fault
>> applies to a particular release of Mandriva Linux; on 2007.0 it did not
>> occur and neither in 2008.0.  Mandriva 2008 Spring (2008.1) however
>> does exhibit the bug or whatever it is.  Somebody using Cooker,
>> essentially 2009.0, does not see the fault.
>>
>> Ruby fails almost immediately for any ruby-tk script with a message
>> which always has this form:
>>
>>   alloc: invalid block: 0x95e190: ef ef 30 Abort (core dumped)
>>
>> The address varies to some extent but the contents or whatever they are
>> (registers maybe) always come up as ef ef 30.  My guess is that there
>> is a failure to initialize some variable or pointer which is used in
>> memory allocation.  As far as I can see the root window is created
>> successfully and it may be possible to run one or two lines of code
>> beyond that.  Then it breaks.  Ruby itself works without a problem,
>> likewise fxruby, and Tcl/Tk scripts on their own work and so do
>> combinations of Tcl/Tk and C or C++.  There are no architecture or
>> version mismatches.  The test system is x86_64 dual core with Tk 8.5a5.
>>  Other people have already pointed out that Mandriva should have moved
>> on to 8.5b3 by now but that may be irrelevant because Tk does work.  I
>> have reinstalled 2008.1 two or three times and also reverted to 2008.0
>> to prove that 2008.1 always behaves this way and only 2008.1.
>>
>> Has anybody else here seen this?  It would be helpful to me if someone
>> with an installation of Mandriva Spring 2008 on a 64-bit machine could
>> check this out, maybe using an example from the Pickaxe or Using Ruby
>> Gems.  I could supply a simple test script if necessary.
>>
>> TIA
>>
>> Len

Further investigation reveals that the ttk themed widget set can be used 
without causing core dumps but any attempt to reference the legacy 
widgets raises signal 6.  The change here is from Tk8.5.0 to Tk8.5.1 and 
affects only ruby-tk, not Tcl/Tk.

Len