I don't know whether this bug belongs to git or glibc. I was running `git clone --reference ~/src/rust https://github.com/rust-lang/rust rust-temp`. I hit Ctrl-c. Cloning into 'rust-temp'... ^CFatal glibc error: malloc.c:2599 (sysmalloc): assertion failed: (old_top == initial_top (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) == 0) Aborted I'm reporting this in case this is the result of memory corruption (which can sometimes indicate more serious problems).