LibSass: stack overflow #5 in libsass

./sassc test099 /dev/null triggers this stack overflow. ==9395==ERROR: AddressSanitizer: stack-overflow on address 0x7fff5d9a4e48 pc 0x000000584c3a bp 0x7fff5d9a56b0 sp 0x7fff5d9a4e50 T0 0 0x584c39 in asanmemset /home/geeknik/sassc/bin/sassc+0x584c39 1 0x83b798 in Sass::Parser::advanceToNextToken...