[Chicken-hackers] [PATCH] [SECURITY] Fix segfault in C_i_length() on improper lists

[Peter Bex]

Hi all,

I just noticed ticket #1375 is caused by an incorrect check in C_i_length
which causes a segfault when passed an improper list.  That means this
could be a denial of service if (length) is used on user input.
The attached patch applies both to master and chicken-5.

Cheers,
Peter

0001-Fix-segmentation-fault-in-length-on-improper-lists.patch
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