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Fixed bug #79821 #5837

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Fixed bug #79821 #5837

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twose
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@twose twose commented Jul 10, 2020

HashTable was reallocated (zend_hash_packed_grow) during php_var_dump, so we should call GC_ADDREF to make SEPARATE_ARRAY work

var_dump should have been treated as a read-only function, but the output handler breaks this

It looks like this bug affects all PHP versions

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Test failures unrelated. This should be applied to 7.3 upwards.

@php-pulls php-pulls closed this in 150504e Jul 10, 2020
@twose twose deleted the bug79821 branch July 10, 2020 22:24
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twose commented Jul 11, 2020

@nikic

I'm sorry for my wrong operation...when I applied this patch to PHP7.3, the git committed the changes to the wrong line
I submitted a new patch immediately to prevent other developers' programs from crashing, also solved the segfaults located in debug_zval_dump and var_export

56dec3c

the patch applied to debug_zval_dump solved the segfault, but break the tests about refcount (also breaks the backward compatibility of debug_zval_dump), do you have any ideas?

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nikic commented Jul 11, 2020

@twose Can you just print refcount - 1 in debug_zval_dump, to compensate for the added ref?

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twose commented Jul 11, 2020

OK, that‘s what I thought too :)

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twose commented Jul 11, 2020

@nikic
twose@0fae877
Does it look ok? or just Z_REFCOUNT_P(struc) - 1

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nikic commented Jul 11, 2020

@twose I would just use Z_REFCOUNT_P(struc) - 1.

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3 participants