Empty (?) reference to a function definition in a list of expressions.

[ghost]

I am trying to learn Hy by using Calysto Hy ipython kernel.

The problem is, however, that there seems to be a problem with return values of function definitions.

Specifically:

If I run the following code in a separate cell:

(def a '(+ (+ 2 3) (* 3 4)))
(def b "bbb")
a

Out[]: displays nothing.

Then I run it like this:

(def a '(+ (+ 2 3) (* 3 4)))
(def b "bbb")
a
b

Out[]: displays ('+' ('+' 2 3) ('*' 3 4))

And the following code:

(def a '(+ (+ 2 3) (* 3 4)))
(def b "bbb")
a
b
a

Evaluates to:
'bbb'

This behaviour is not present in a raw Hy interpreter opened in console.

The version of Calysto Hy is from GIT.
Python version is 3.5.2.
Hy version is 0.13.0

I filed a bug in the Calysto Hy issue tracker:
Calysto/calysto_hy#4
@Calysto_hy

But Calysto Hy developers suspect it might be an issue with Hy itself.

[Kodiologist]

To be clear, none of the Hy code you've quoted here includes a function definition. In Hy, def is just a synonym for setv, or in Python terms, =. Functions are defined with defn or fn.

The behavior of your code does seem weird, but I wouldn't know where to look in Hy without a way to replicate this bug that uses only Hy itself.

If Calysto Hy didn't have this issue with previous versions of Hy, the changes to the REPL that occurred in #1246 are probably the culprit.

[Kodiologist]

I'm going to close this, but let's reopen it if a way is found to replicate the bug with Hy alone, or if it's otherwise verified that the problem is with Hy.