Bus error on git merge

I'm getting a Bus error when I try to merge on Intel OS X:

(gdb) run Starting program: /usr/local/bin/git merge 4396bbd7ff5fe3084c11e0cd11a7928cf77e3755 Reading symbols for shared libraries ++++++. done

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000004
0x00087e63 in sha_eq ()
(gdb) bt
#0  0x00087e63 in sha_eq ()
#1  0x00088866 in merge_trees ()
#2  0x0008a400 in merge_recursive ()
#3  0x000389dc in try_merge_strategy ()
#4  0x0003a2df in cmd_merge ()
#5  0x000024db in handle_internal_command ()
#6  0x00002742 in main ()