[Octave-bug-tracker] [bug #54781] Matrix creation functions (eye, rand, zeros, ...) allow invalid non-integer dimensions

[Kai Torben Ohlhus]

URL:
  <https://savannah.gnu.org/bugs/?54781>

                 Summary: Matrix creation functions (eye, rand, zeros, ...)
allow invalid non-integer dimensions
                 Project: GNU Octave
            Submitted by: siko1056
            Submitted on: Thu 04 Oct 2018 04:19:30 PM CEST
                Category: Interpreter
                Severity: 4 - Important
                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: Any

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Details:

While fixing another bug, I received errors, because of potentially erroneous
test cases (maybe copy&paste errors from "sprand")
https://hg.savannah.gnu.org/hgweb/octave/file/20e294a607af/test/diag-perm.tst#l80


A = rand (n-3, n, .5);


Additionally, Octave does not error on the following statements, and silently
creates nonsense:


>> A = eye (0.5), size(A)
A = [](0x0)
ans =
   0   0

>> A = eye ([2, 0.5]), size(A)
A = [](2x0)
ans =
   2   0

>> A = eye (2, 0.5), size(A) # works!
error: eye: conversion of 0.5 to int64_t value failed


Similar for "zeros" and "ones" (only the first as example given below:


>> A = zeros (0.5), size(A)
A = [](0x0)
ans =
   0   0

>> A = zeros (2, 0.5), size(A)
A = [](2x0)
ans =
   2   0

>> A = zeros (2, 0.5, 4), size(A)
A = [](2x0x4)
ans =
   2   0   4






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