scala/scala — pull request #661 by retronym (2012-06-03 16:30:58+00:00)
Title: SI-5683 Fail gracefully when transposing a ragged type arg matrix.

The code used to do this, until `transpose` starting throwing IAE
rather than AIOOBE.

Symptomatic treatment only: The reported crasher now infers ill-kinded
type args and reports an error.

review by @adriaanm (who applied the band-aid that fell off 68aeeae)