[bug #62096] Bad result in basic addition of two numbers

[Raul Infante-Sainz]

URL:
  <https://savannah.gnu.org/bugs/?62096>

                 Summary: Bad result in basic addition of two numbers
                 Project: GNU Astronomy Utilities
            Submitted by: infantesainz
            Submitted on: Tue 22 Feb 2022 03:13:33 PM UTC
                Category: Arithmetic
                Severity: 3 - Normal
              Item Group: Output not reasonable
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

I am using Arithmetic (Gnuastro 0.16.165-b4b2). With a very simple command I
obtain nonsense result.

The command:

astarithmetic 250 1 +



The result:

astarithmetic: the two integer operands given to '+' have the same width, but
a different sign: the first popped operand has type 'int8' and the second has
type 'uint8'. This may create unexpected results if the signed input contains
negative values. To address this problem there are two options: 1) if you know
that the signed input can only have positive values, use Arithmetic's type
conversion operators to convert it to an un-signed type of the same width
(e.g., 'uint8', 'uint16', 'uint32' or 'uint64'). 2) Convert the unsigned input
to a signed one of the next largest width with the type conversion operators
(e.g., 'int16', 'int32' or 'int64')
-5
Arithmetic finished in 0.000339 seconds





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