flisp segfaults on 32 bits when MEMDEBUG2 is defined

[garrison]

When MEMDEBUG2 is defined, flisp segfaults for me when compiled for 32 bits.

My Make.user:

ARCH = i686
CFLAGS = -DMEMDEBUG -DMEMDEBUG2

I am running 64-bit (multiarch) Debian jessie. The 32-bit build works fine unless I provide MEMDEBUG2 as a #define.

Here is a log of the build and valgrind's output.

[JeffBezanson]

My guess is that this is because flisp requires 8-aligned addresses. This is no problem either (1) with flisp's normal allocator, or (2) on a 64-bit system. With MEMDEBUG2 I use malloc for everything, and it's probably not always 8-aligned on 32-bit. There should be more assertions for this.