Description:
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The following script causes various PHP versions to segfault: <?php $string = 'abc'; echo $string{1} = 3+3 ?>

The following doesnt crash: <?php $string = 'abc'; echo $string{1} = 3 ?>

Anything with math will make it crash (* / + - ^ etc.) just using = 3 wont make it crash. May be noted that using the php -r way it wont core.. seems to work only being put in a file.

Results of the code on debian SID (yes, 4.3.3 but read on)are below.

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hybrid:~# php < bla.php 
6Segmentation fault

hybrid:~# php -r "$string = 'abc'; echo $string{1} = 3+3"

Parse error: parse error in Command line code on line 1

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(Tried) reproduced on:

WinXP + Apache 1.3.29 + PHP 4.3.4 crashed.
WinXP + PHP 4.2.3 does NOT crash

Fedora Red Hat Linux 3.3.2-1 + Apache2 + PHP 4.3.4: NOT crashed

FreeBSD 4.2: doesnt crash (4.1.2)
FreeBSD 4.5: didnt print anything (not even 6)
FreeBSD 4.6: doesnt crash 
FreeBSD 4.7: didnt print anything (not even 6) 
FreeBSD 4.8: didnt print anything (not even 6) (4.3.1)
FreeBSD 4.9-RELEASE: crash (4.3.3)

Slackware current + PHP 4.3.4: crash
Redhat 7.3 + PHP 4.3.4: prints nothing
PLD Linux: NOT crashing

Thats about all stats I could collect. Had no machines with 4.3.5RC1 around to test it.

Regards,

Reproduce code:
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<?php $string = 'abc'; echo $string{1} = 3+3 ?>

Expected result:
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Ehm 6, well something else in fact. Was just toying around with string incrementing etc. Wasnt going to work obviously (needed chr/ord) original code was 'c' - 32 instead of 3+3.

Actual result:
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6Segmentation fault