josef-pkt/scipy — comment on commit 2a34dcd780e9f089118b830af03e02f275a55192
File:  line 0
By WarrenWeckesser:

The new formula blows up near lambda=0. It has removable discontinuity at lambda=0, where the value should by (pi**2)/3. We'll need to check for lambda being close to 0 and switch to a different formula.