Infinite (?) loop in distance calculation

[pramsey]

For the pair of attached geometries, the standard distance code appears to go into an infinite (at least, very long) loop. Similarly sized geometries can run distance calculations in a few 10s of ms.

select 
  st_distance(a.geom, b.geom), 
  a.edabbr, b.edabbr,  
  st_memsize(a.geom), st_memsize(b.geom) 
from inf_distance a, inf_distance b;

[pramsey]

example data