1 files changed, 71 insertions, 0 deletions
diff --git a/mpc/tests/tpow.c b/mpc/tests/tpow.c
new file mode 100644
index 0000000000..3592209303
--- /dev/null
+++ b/mpc/tests/tpow.c
@@ -0,0 +1,71 @@
+/* tpow -- test file for mpc_pow.
+
+Copyright (C) 2009, 2011 INRIA
+
+This file is part of GNU MPC.
+
+GNU MPC is free software; you can redistribute it and/or modify it under
+the terms of the GNU Lesser General Public License as published by the
+Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+GNU MPC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with this program. If not, see http://www.gnu.org/licenses/ .
+*/
+
+#include "mpc-tests.h"
+
+static void
+reuse_bug (void)
+{
+   /* bug found by the automatic builds on
+      http://hydra.nixos.org/build/1469029/log/raw */
+   mpc_t x, y, z;
+   mp_prec_t prec = 2;
+
+   for (prec = 2; prec <= 20; prec ++)
+     {
+       mpc_init2 (x, prec);
+       mpc_init2 (y, prec);
+       mpc_init2 (z, prec);
+   
+       mpfr_set_ui (mpc_realref (x), 0ul, GMP_RNDN);
+       mpfr_set_ui_2exp (mpc_imagref (x), 3ul, -2, GMP_RNDN);
+       mpc_set_ui (y, 8ul, MPC_RNDNN);
+
+       mpc_pow (z, x, y, MPC_RNDNN);
+       mpc_pow (y, x, y, MPC_RNDNN);
+       if (mpfr_signbit (mpc_imagref (y)) != mpfr_signbit (mpc_imagref (z)))
+         {
+           printf ("Error: regression, reuse_bug reproduced\n");
+           exit (1);
+         }
+
+       mpc_clear (x);
+       mpc_clear (y);
+       mpc_clear (z);
+     }
+}
+
+
+int
+main (void)
+{
+  DECL_FUNC (C_CC, f, mpc_pow);
+
+  test_start ();
+
+  reuse_bug ();
+
+  data_check (f, "pow.dat");
+  tgeneric (f, 2, 1024, 7, 10);
+
+  test_end ();
+
+  return 0;
+}