#2734 "pdiff" and "opsubst" do not work together

None
open
nobody
5
2014-05-21
2014-05-21
No

Packages "pdiff" and "opsubst" do not play well together:

(%i1) load("pdiff")$
(%i2) load("opsubst")$
(%i3) df: diff(f(x), x);
(%o3)                               f   (x)
                                     (1)
(%i4) opsubst(A, B, df);
simplifya: operator is neither an atom nor a lambda expression: (((($PDERIVOP SIMP) $F 1)) $X)
 -- an error. To debug this try: debugmode(true);

Maxima version: "branch_5_33_base_1_g4fcaa85"
Maxima build date: "2014-04-04 00:58:37"
Host type: "x86_64-unknown-linux-gnu"
Lisp implementation type: "CLISP"
Lisp implementation version: "2.49 (2010-07-07) (built 3577466571) (memory 3605554722)"

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