# HG changeset patch
# User Arun Giridhar <arungiridhar@gmail.com>
# Date 1663585531 14400
# Node ID a026fb2be108656506bcda46ec8b4b92e7014f9c
# Parent  6646f2b5a3d11f8cdbf3a96f8dad9e2c0d182e2a
sparse-xpow.cc: Return empty matrix for empty input (bug #63080)

diff -r 6646f2b5a3d1 -r a026fb2be108 libinterp/corefcn/sparse-xpow.cc
--- a/libinterp/corefcn/sparse-xpow.cc	Sat Sep 17 04:22:38 2022 -0400
+++ b/libinterp/corefcn/sparse-xpow.cc	Mon Sep 19 07:05:31 2022 -0400
@@ -66,9 +66,12 @@
   octave_idx_type nr = a.rows ();
   octave_idx_type nc = a.cols ();
 
-  if (nr == 0 || nc == 0 || nr != nc)
+  if (nr != nc)
     error ("for A^b, A must be a square matrix.  Use .^ for elementwise power.");
 
+  if (nr == 0 && nc == 0)
+    return a;
+
   if (! xisint (b))
     error ("use full(a) ^ full(b)");