2 <p>Add a spanner inside a fixed-size clipped block inside a multicol container. It should not be
3 affected by the clipping, since the containing block of a spanner is the multicol
4 container. This also tests that we don't perform any optimized subtree layout operations
5 incompatible with multicol (which would typically cause assertion failures).
</p>
6 <p>You should see the word
"PASS" below, and nothing else (no red, no
"FAIL").
</p>
7 <div style=
"line-height:2em;">