Cannot Execute Org-Babel Haskell Block

Question

In an org-mode file:

#+BEGIN_SRC haskell
let x = "test"
putStrLn x
#+END_SRC

yields:

executing Haskell code block...
if: ‘org-babel-script-escape’ expects a string

My guess would be: a mismatch between Haskell mode and Org mode versions. So, I'd try experimenting with different versions of both. — wvxvw, Sep 24 '17 at 4:59
You don't want let in a Haskell babel code block. let is for the feeding lines into the REPL one-by-one. — 147pm, Mar 22 at 16:56

adolflow · Accepted Answer · 2018-07-28 22:43:26Z

1

I've solved it writing the header argument :results output after the declaration of the language in the head of the block source.

#+BEGIN_SRC haskell :results output

answered Jul 28 '18 at 22:43

adolflow

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Elvecent · Accepted Answer · 2018-07-08 10:20:59Z

I didn't manage to comprehend the source code inducing the error, but...

I have same error with #+BEGIN_SRC haskell.

However, #+BEGIN_SRC haskell :results value :eval (inferior-haskell-start-process) works for some reason.

I have

haskell-mode       20180601.143  installed
org                9.1.13        installed

2 Answers 2