Today I stumbled over a regression in our lapack support.

https://oldcode.jsoftware.com/wiki/Essays/Eigenvalues

Changing the first lines to:

require 'math/lapack2'
ev=:[: clean_jlapack2_ 1 >@{ dgeev_jlapack2_

I get a cd error from ev

   ev dm >:i.20
|domain error: cd

   cder''
4 0

(wrong number of parameters)

(Oddly, also, cderx seems to produce a result for me which is unrelated
to the result of cder. The first time I try it, I get 109 The pipe has
been ended. but subsequent attempts get 0 The operation completed
successfully. Meanwhile, cder will continue to give me 4 0 after one
of these errors while cderx will at this point tell me that the
operation completed successfully.)

This behavior is consistent between J903 and J904.

FYI,

--
Raul
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