[Octave-bug-tracker] [bug #46350] Random errors with eval / function / clear

[Julien Bect]

URL:
  <http://savannah.gnu.org/bugs/?46350>

                 Summary: Random errors with eval / function / clear
                 Project: GNU Octave
            Submitted by: jbect
            Submitted on: sam. 31 oct. 2015 18:53:41 GMT
                Category: Interpreter
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

Consider the following code:


eval (["function __test__ ()\n" ...
   "HOMOSCEDASTIC_NOISE = true;" ...
   "stk_example_kb09;" ...
   "endfunction"]);  __test__

clear __test__

eval (["function __test__ ()\n" ...
   "HOMOSCEDASTIC_NOISE = false;" ...
   "stk_example_kb09;" ...
   "endfunction"]);  __test__


Loading the stk package and running this code (in a script) several times in a
row results in errors of the type:


error: 'HOMOSCEDASTIC_NOISE' undefined near line 60 column 4
error: called from
    stk_example_kb09 at line 60 column 1
    __test__ at line 2 column 29
    toto at line 11 column 18


The variable the triggers the error changes from time (it can be
'HOMOSCEDASTIC_NOISE' undefined near line 60 column 4, 'NOISE_STD_FUNC'
undefined near line 77 column 13, 'zi' undefined near line 78 column 6...).

Once in a while it doesn't fail.

Removing the 'clear' statement in the middle seems to solve the issue,
although I don't understand why.






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