cargo pgrx regress not working

[danbluhmhansen]

Hello there, I cannot get the cargo pgrx regress command to work. I have adapted the directory structure according to #2136, so I have this test set up:

tests
└── pg_regress
    ├── expected
    │   └── setup.out
    └── sql
        ├── jsonb_diff.sql
        └── setup.sql

Running cargo pgrx regress results in this:

tests
└── pg_regress
    ├── expected
    │   └── setup.out
    ├── regression.diffs
    ├── regression.out
    ├── results
    │   └── jsonb_diff.out.diff
    └── sql
        ├── jsonb_diff.sql
        └── setup.sql

The regression.out file contains:

# using postmaster on localhost, port 28818
# could not exec "sh": No such file or directoryBail out!
# diff command failed with status 512: diff  "/Users/dan/dev/pg_json_patch/tests/pg_regress/expected/jsonb_diff.out" "/Users/dan/dev/pg_json_patch/tests/pg_regress/results/jsonb_diff.out" > "/Users/dan/dev/pg_json_patch/tests/pg_regress/results/jsonb_diff.out.diff"Bail out!

All the other new files are empty.

If I manually create an empty tests/pg_regress/results/jsonb_diff.out, in the results directory not in the expected directory, then I get the option:

-----------

test `jsonb_diff` generated the above output:
Accept [Y, n]? y

i.e it does not output anything, but choosing y does create an empty file.

Running the contents of tests/pg_regress/sql/jsonb_diff.sql does print the following, so I know the extension is working:

                                                                                                    jsonb_diff                                            
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 [{"op": "remove", "path": "/author/familyName"}, {"op": "add", "path": "/phoneNumber", "value": "+01-123-456-7890"}, {"op": "remove", "path": "/tags/1"}, {"op": "replace", "path": "/title", "value": "Hello!"}]
(1 row)

Not quite sure what I am doing wrong.