Comment 3 for bug 1074667

The file loads fine here. I have to zoom out to make it crash. The crash is a NULL pointer dereference in dec(), the struct edge *e argument is NULL.

git bisect unhelpfully points at the new compositor architecture (Why does that commit remove asserts from the scan converter?):

git bisect start
# good: [0540bf384aed344899417d3b0313bd6704679c1c] ps: improve formatting of fallback image comment
git bisect good 0540bf384aed344899417d3b0313bd6704679c1c
# bad: [65a954d5bab9ab6fed15bd98b7018aca2fc50107] test-surfaces: compilation fixes
git bisect bad 65a954d5bab9ab6fed15bd98b7018aca2fc50107
# skip: [af9fbd176b145f042408ef5391eef2a51d7531f8] Introduce a new compositor architecture
git bisect skip af9fbd176b145f042408ef5391eef2a51d7531f8

_cairo_debug_print_polygon() against the polygon that causes this produces something which doesn't look correct in show-polygon, which means the error might be elsewhere.