I'd forgotten that tcsh was the default for 10.1, but SF's 10.1 system

uses bash and so does my 10.2 system.  "limit stacksize 2048" is the
right invocation for tcsh/csh.

README

@@ -456,10 +456,11 @@ Reliant UNIX: The thread support does not compile on Reliant UNIX, and
         future release.
 
 MacOSX: The tests will crash on both 10.1 and 10.2 with SEGV in
-        test_re and test_sre due to the small default stack size.  Do
-        "ulimit -s 2048" before "make test" to avoid the failure.
-        Note that this is a built-in bash command so if you're using a
-        different shell, the command may be different too.
+        test_re and test_sre due to the small default stack size.  If
+        you set the stack size to 2048 before doing a "make test" the
+        failure can be avoided.  If you're using the tcsh (the default
+        on OSX), or csh shells use "limit stacksize 2048" and for the
+        bash shell, use "ulimit -s 2048".
 
         On naked Darwin you may want to add the configure option
         "--disable-toolbox-glue" to disable the glue code for the Carbon