This patch was written in-house, but ported from Python 2.7; it is unclear
from the version history why these lines were dropped in version 3.  The
patch has not yet been submitted upstream, but submission is planned.

--- Python-3.5.1rc1/Lib/test/test_gdb.py.~1~	2015-12-04 08:05:05.566320671 -0800
+++ Python-3.5.1rc1/Lib/test/test_gdb.py	2015-12-04 08:09:12.755287204 -0800
@@ -50,6 +50,8 @@
                             "embedding. Saw %s.%s:\n%s"
                             % (gdb_major_version, gdb_minor_version,
                                gdb_version))
+if sys.platform.startswith("sunos"):
+    raise unittest.SkipTest("test doesn't work very well on Solaris")
 
 if not sysconfig.is_python_build():
     raise unittest.SkipTest("test_gdb only works on source builds at the moment.")