Occasionally a program will throw an error at you from glibc regarding a malloc problem, e.g. a double free warning. You can disable malloc()'s checking by setting the MALLOC_CHECK_ variable to 0 (there are several levels, enabling various checks). This may enable the program to work if it's not actually a problem. It may instead just enable your program to die a horrible, undocumented death some time shortly thereafter Your mileage may vary!
Handy copy-and-paste:
export MALLOC_CHECK_=0