I am getting this from `M-x Info-search', whereas the info command in my
shell has no trouble finding the text.  For example, search for `align('
in the attached.

--8<---------------cut here---------------start------------->8---
Info-extract-pointer: Search failed: "

Indirect:"
--8<---------------cut here---------------end--------------->8---

Almost any search in the attached fileset will fail in this way if you
repeat it enough times.  Is the texi ill-formed?