[Question][Hw4] Issue with `dune-project` file

[Lee-Janggun]

Before starting HW5, I wanted to fix problems in HW4, so I ran the added test cases with make all in the given Docker image, but got the following error.

File "test/dune", line 18, characters 3-81:
18 |    (pipe-stdout
19 |     (run ../analyzer interval example1.ll)
20 |     (run cut -f1 -d,)))))
Error: 'pipe-stdout' is only available since version 2.7 of the dune
language. Please update your dune-project file to have (lang dune 2.7).

Changing the dune version in dune-project to 2.9 (the version from dune --version fixed the problem. Was this done when grading HW4? I assume the TAs would have made this change, but I just wanted to be sure :)

[hyunsukimsokcho]

Sorry for the inconvenience. As the error msg says, changing the dune-project file to indicate dune version 2.7 or further would fix. When grading, we considered the issue.

[Lee-Janggun]

Thank you for the confirmation!