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[PATCH] Re: Breadperl & Tk

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Nick Ing-Simmons
December 12, 2000 06:48
[PATCH] Re: Breadperl & Tk
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Nick Ing-Simmons <> writes:
>Nick Ing-Simmons <> writes:
>>B. When I fix A in Tk sources it core dumps in a manner which suggests
>>   something has done heap-overrun.
>This is a weird one. SPARC/gcc-2.95.2 was botching the test-for-hibit 
>code in sv_utf8_upgrade and give false positives. (Which is bad
>news and I have submitted GNATS report to gcc.) But it seems all that does
>is exercise the "representation does not matter" aspect of SvUTF8 ;-)
>It also forced us to confront the case where it tried to upgrade and 
>Safefree() an SvFAKE sv (or indeed any other SvLEN == 0 non-malloced case).
>This then lead to the core dumps.
>Patch moves the hibit init out of the for loop, makes it an int not a bool (char)
>either of which fixes false +ve bug on SPARC/gcc. And corrects the other
>two issues for when they really occur.
Nick Ing-Simmons <>
Via, but not speaking for: Texas Instruments Ltd.

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