PGconn::connect segfaults with certain arguments about ruby-pg HOT 2 CLOSED

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000002000
0x00007fff822b1120 in strlen ()
(gdb) bt 10
#0  0x00007fff822b1120 in strlen ()
#1  0x000000010010fa0f in BSD_vfprintf (fp=0x7fff5fbfdc30, fmt0=<optimized>, 
	ap=0x7fff5fbfdca0) at vsnprintf.c:927
#2  0x000000010011002c in rb_enc_vsprintf (enc=0x0, 
	fmt=0x100552db0 "Expected connection info string, hash, or 7 
	separate arguments, got a %s.", ap=0x7fff5fbfdca0) at sprintf.c:1170
#3  0x00000001000477a4 in rb_raise (exc=4303972400, fmt=<optimized>) 
	at error.c:1471
#4  0x000000010054ab63 in parse_connect_args (argc=0, argv=0x100400038, 
	self=<optimized>) at pg.c:295
#5  0x000000010054b2d9 in pgconn_init (argc=<optimized>, argv=<optimized>, 
	self=4328694120) at pg.c:409
#6  0x000000010017d214 in vm_call0 (th=0x1003016b0, recv=<optimized>, id=456, 
	argc=0, argv=0x100400038, me=0x1003c5750) at vm_eval.c:79
#7  0x000000010018242e in rb_funcall2 (recv=4328694120, mid=<optimized>, 
	argc=0, argv=0x100400038) at vm_eval.c:235
#8  0x000000010009c263 in rb_class_new_instance (argc=0, argv=0x100400038, 
	klass=<optimized>) at object.c:1545
#9  0x0000000100187c03 in vm_call_cfunc [inlined] () at 
	/Users/ged/.rvm/src/ruby-1.9.2-p180/vm_insnhelper.c:402
(More stack frames follow...)