[Octave-bug-tracker] [bug #65557] Byte-code interpreter does not provide full (recursive) set of error information in some cases

[Hendrik K]

URL:
  <https://savannah.gnu.org/bugs/?65557>

                 Summary: Byte-code interpreter does not provide full
(recursive) set of error information in some cases 
                   Group: GNU Octave
               Submitter: koerhen
               Submitted: Fri 05 Apr 2024 04:43:09 AM UTC
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Missed Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: bytecode-evaluator
         Discussion Lock: Any
        Operating System: GNU/Linux
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Fri 05 Apr 2024 04:43:09 AM UTC By: Hendrik K <koerhen>
In certain cases the byte-code interpreter does not provide all information
from a thrown error. Especially the line number of the root cause error may be
missing (making debugging quite difficult).

Steps to reproduce with 2 function files

function ret = test1(in);
  in_1 = in * 2;
  if in_1 < 100
    ret = cos(in);
  else
    ret = cos(in(2)); # causes error if "in" is a scalar 
  endif
endfunction



function ret = test2()
  ret = arrayfun(@(x) test1(x),1:200,'uni',false);
endfunction


The thrown error message(s) do not show where the root cause error occurs and
in which line:

>> test2()
error: in(2): out of bound 1 (dimensions are 1x1)


When the byte-code interpreter is deactivated (do not forget to clear test1 +
test2), one sees the root cause error + line:

__vm_enable__(0);
clear test1 test2;
test2()
error: in(2): out of bound 1 (dimensions are 1x1)
error: called from
    test1 at line 6 column 5
    test2>@<anonymous> at line 2 column 23
    test2 at line 2 column 3













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