sort returns an wrong error message for struct

[Nelson-numerical-software]

Current behavior:

--> sort(nonreg_tests)

Error: 
Too many dimensions! Current limit is 16.

sort(cell(1,1))

Expected behavior

--> tests_dir = 'd:\developpements\Github\nelson\modules\mex'

tests_dir =

    'd:\developpements\Github\nelson\modules\mex'

--> nonreg_tests = dir([tests_dir, 'bug_*.nls'])

nonreg_tests = 

  0×1 empty struct array with fields:

    name
    folder
    date
    bytes
    isdir
    datenum

--> sort(nonreg_tests)
Undefined function 'sort' for input arguments of type 'struct'.