Hi, The test_json_pointer test in make check fails with mpich-3.4.1 MacSO Big Sur intel and gcc-10.2 (home-brew compilers): MacBookGray:tests $ ./test_json_pointer PASSED - GET - LOADED TEST JSON { "foo": [ "bar", "baz" ], "": 0, "a\/b": 1, "c%d": 2, "e^f": 3, "g|h": 4, "i\\j": 5, "k\"l": 6, " ": 7, "m~n": 8 } PASSED - GET - ENTIRE OBJECT WORKED PASSED - GET - /foo == ['bar', 'baz'] PASSED - GET - /foo/0 == 'bar' PASSED - GET - / == 0 PASSED - GET - /a~1b == 1 PASSED - GET - /c%d == 2 PASSED - GET - /e^f == 3 PASSED - GET - /g|h == 4 PASSED - GET - /i\j == 5 PASSED - GET - /k"l == 6 PASSED - GET - / == 7 PASSED - GET - /m~0n == 8 { "arr": [ { "obj": [ { }, { }, { "obj1": 0, "obj2": "1" } ] } ], "obj": { "obj": { "obj": [ { "obj1": 0, "obj2": "1" } ] } } } Assertion failed: (0 == json_pointer_getf(jo1, &jo2, "/%s/%d/%s/%d/%s", "arr", 0, "obj", 2, "obj2")), function test_recursion_get, file test_json_pointer.c, line 136. Abort trap: 6 Strangely enough, the same test works fine under arm64. Any suggestion? Regards, Blaise -- A.K. & Shirley Barton Professor of Mathematics Adjunct Professor of Mechanical Engineering Adjunct of the Center for Computation & Technology Louisiana State University, Lockett Hall Room 344, Baton Rouge, LA 70803, USA Tel. +1 (225) 578 1612, Fax +1 (225) 578 4276 Web http://www.math.lsu.edu/~bourdin