Bootstrap failure in libio on SunOS4 and AIX4

["Kaveh R. Ghazi" <ghazi@caip.rutgers.edu>]

	I'm getting a bootstrap failure in libio on powerpc-ibm-aix4.1.4.0
and sparc-sun-sunos4.1.4 (but it does not happen on Solaris2.7, OSF4
or Irix6.)

	It looks like this:

 > /a/caip/a47/u47/ghazi/gcc-testing/sunos-test/egcs-CVS19990411/gcc/xgcc
 > 	-B/a/caip/a47/u47/ghazi/gcc-testing/sunos-test/egcs-CVS19990411/gcc/
 > 	-B/usr/local/sparc-sun-sunos4.1.4/bin/ -c -g -O2
 > 	-fno-implicit-templates -I. -I. -nostdinc++ iostream.cc
 > iostream.cc: In method `iostream::iostream(streambuf *, ostream * = 0)':
 > iostream.cc:966: Internal compiler error.
 > iostream.cc:966: Please submit a full bug report to
 > 	`egcs-bugs@egcs.cygnus.com'.
 > iostream.cc:966: See
 > 	<URL: http://egcs.cygnus.com/faq.html#bugreport > for details.
 > make[2]: *** [iostream.o] Error 1


	When I run cc1plus under gdb on SunOS4, I get:

 > Program received signal SIGSEGV, Segmentation fault.
 > make_edge (src=0x463e70, dst=0x0, flags=12) at flow.c:1085
 > 1085      e->pred_next = dst->pred;
 > (gdb) where
 > #0  make_edge (src=0x463e70, dst=0x0, flags=12) at flow.c:1085
 > #1  0xc4dbc in make_label_edge (src=0x463e70, label=0x45aad8, flags=12)
 >     at flow.c:1113
 > #2  0xc4bc0 in make_edges (label_value_list=0x46f1c8, bb_eh_end=0xefffe970)
 >     at flow.c:1035
 > #3  0xc3df4 in find_basic_blocks (f=0x4539e0, nregs=311, file=0x0, 
 >     do_cleanup=1) at flow.c:405
 > #4  0xc498 in rest_of_compilation (decl=0x3d6268) at toplev.c:4170
 > #5  0x1b6d8c in finish_function (lineno=966, flags=0, nested=0) at decl.c:14175
 > #6  0x202f74 in yyparse () at parse.y:641
 > #7  0xa348 in compile_file (name=0xeffffc63 "iostream.ii") at toplev.c:3019
 > #8  0xec10 in main (argc=8, argv=0xeffffb24) at toplev.c:5354


	It looks like its dying because parameter `dst' is NULL.

		--Kaveh
--
Kaveh R. Ghazi			Engagement Manager / Project Services
ghazi@caip.rutgers.edu		Qwest Internet Solutions