Patched bwlabeln

compatibility/bwlabeln_comp.m

@@ -0,0 +1,11 @@
+function varargout = bwlabeln_comp(varargin)
+% bwlabeln(1), bwlabeln(8), bwlabeln(true) give an error on TIO. This patches that
+if numel(varargin{1})==1 && varargin{1} % patch
+    varargout{1} = 1;
+    if nargout>1
+        varargout{2} = 1;
+    end
+else % normal call to bwlabeln
+    [varargout{1:nargout}] = builtin('bwlabeln', varargin{:});
+end
+end

matl_compile.m

@@ -368,7 +368,7 @@
         'triu' 'tril' 'randsample' 'nchoosek' 'vpa' 'sum' 'mean' 'prod' 'diff' 'mod' 'repelem' 'dec2bin' 'dec2base' ...
         'hypergeom' 'disp' 'str2func' 'logical' 'circshift' 'pdist2' 'strsplit' 'max' 'min' 'strncmp' 'round'...
         'datestr' 'regexp' 'regexprep' 'imshow' 'mat2str' 'blkdiag' 'strcat' 'str2num' 'str2double' 'cconv' ...
-        'gcd' 'lcm' 'fftn' 'mode' 'nnz' 'str2sym' 'factor'};
+        'gcd' 'lcm' 'fftn' 'mode' 'nnz' 'str2sym' 'factor' 'bwlabeln'};
     verNumTh = [4 0 0]; % first version in which a modified function is not needed:
     if (verNum(1)<verNumTh(1)) || ((verNum(1)==verNumTh(1)) && (verNum(2)<verNumTh(2))) || ((verNum(1)==verNumTh(1)) && (verNum(2)==verNumTh(2)) && (verNum(3)<verNumTh(3)))
         fnames = [fnames {'colon'}];

spec/MATL_spec.tex

@@ -1438,7 +1438,11 @@ \subsection{MATL functions}
 \item
 \matlab+sum([],1)+ gives an empty array of size $1 \times 0$ in MATLAB, but \matlab+0+ in Octave. An analogous difference exists with \matlab+prod+. This has been fixed.
 \item
-\matlab+sum(sym([]))+ gives \matlab+0+ in MATLAB, but an empty array of size $1 \times 0$ in Octave. An analogous difference exists with \matlab+prod+. This has been fixed. 
+\matlab+sum(sym([]))+ gives \matlab+0+ in MATLAB, but an empty array of size $1 \times 0$ in Octave. An analogous difference exists with \matlab+prod+. This has been fixed.
+\item
+\matlab+bwlabeln+ with first input of size  $1 \times 1$ different than \matlab+0+ or \matlab+false+ gives an error on some systems.
+% TIO, Octave 4.2.2, Linux 5.2.11-100.fc29.x86_64 (Fedora). vi21
+This has been fixed.
 \end{itemize}