[bug #68101] Missed error with missing tilde in function output

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URL:
  <https://savannah.gnu.org/bugs/?68101>

                 Summary: Missed error with missing tilde in function output
                   Group: GNU Octave
               Submitter: arungiridhar
               Submitted: Fri 27 Feb 2026 12:01:48 PM EST
                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
         Discussion Lock: Unlocked
                 Release: dev
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Fri 27 Feb 2026 12:01:48 PM EST By: Arun Giridhar <arungiridhar>

# Correct statement.
>> [~, order] = sort([3 6 9 2 5 8 1 4 7 10])
order =
    7    4    1    8    5    2    9    6    3   10

# Accidentally miss the "~" character in that line.
# Should be syntax error but gives unexpected result, was very difficult to
debug this.
>> [, order] = sort([3 6 9 2 5 8 1 4 7 10])
order =
    1    2    3    4    5    6    7    8    9   10


For comparison, a doubled comma is trapped properly:

>> function [a,b,c,d,e] = fcn(), a = 1; b = 2; c = 3; d = 4; e = 5;
>> endfunction

>> [,o] = fcn
o = 1

>> [,,o] = fcn
error: syntax error

>>> [,,o] = fcn
      ^

>> [,~,o] = fcn
o = 2









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