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Process not releasing memory

When I run the attached program, a second attempt to run the program
will fail if MacMiNT is running in high memory (above 16 megabytes)
on my mac. It works ok if MacMiNT's partition is lower in memory.

It fails under Mint 1.08 and 1.09, but works ok under .095. 

Is this a known problem, and is there a fix?

# whereami
I am at 0xe532ac
malloc limits are e5430c to 1490234 (6537000)
# !!
Fatal error: insufficient memory

Rick Watson 
The University of Texas Computation Center, Networking Services, 512/471-3241
   internet: r.watson@utexas.edu             bitnet: watson@utadnx
   uucp:     ...!cs.utexas.edu!ut-emx!rick   span:   utspan::utadnx::watson

#include <memory.h>
#include <stdio.h>

main ()
    int i;
    char *c;

    printf ("I am at 0x%x\n", &i);

    for (i = 10000000; i > 0; i -= 1000)
	if (c = malloc(i))

    if (c) {
	printf ("malloc limits are 0x%x to 0x%x (%d bytes)\n", c, c+i, i);