LibSass: stack overflow in libsass

By pasting @H into ./sassc -s, we're able to trigger this stack overflow. ==3470==ERROR: AddressSanitizer: stack-overflow on address 0x7ffe1b09ffc8 pc 0x00000059bc77 bp 0x7ffe1b0a0820 sp 0x7ffe1b09ffd0 T0 0 0x59bc76 in interceptormalloc /home/geeknik/sassc/bin/sassc+0x59bc76 1 0x7f842fedb2e7 in...