[Bug c++/20746] [4.0 only] Incorrect return value for covariant return function returning null ptr

["cvs-commit at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-12 11:29 -------
Subject: Bug 20746

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-4_0-branch
Changes by:	nathan@gcc.gnu.org	2005-07-12 11:28:03

Modified files:
	gcc/cp         : ChangeLog class.c cp-tree.def cp-tree.h decl.c 
	                 decl2.c error.c method.c parser.c pt.c 
	                 semantics.c 
	gcc/testsuite  : ChangeLog 
	gcc/testsuite/g++.dg/overload: error1.C 
	gcc/testsuite/g++.dg/parse: crash11.C 
	gcc/testsuite/g++.old-deja/g++.benjamin: warn02.C 
	gcc/testsuite/g++.old-deja/g++.brendan: arm2.C 
	gcc/testsuite/g++.old-deja/g++.other: redecl2.C redecl4.C 
	gcc/testsuite/g++.old-deja/g++.pt: memtemp78.C 
Added files:
	gcc/testsuite/g++.dg/abi: covariant5.C 
	gcc/testsuite/g++.dg/init: member1.C 
	gcc/testsuite/g++.dg/other: crash-4.C 
	gcc/testsuite/g++.dg/parse: crash26.C defarg9.C 

Log message:
	cp:
	PR c++/20678
	* error.c (dump_expr) <COMPONENT_REF case>: Check DECL_NAME is not
	null.
	
	PR 21903
	* cp-tree.def (DEFAULT_ARG): Document TREE_CHAIN use.
	* parser.c (cp_parser_late_parsing_default_args): Propagate parsed
	argument to any early instantiations.
	* pt.c (tsubst_arg_types): Chain early instantiation of default
	arg.
	
	PR c++/20789
	* decl.c (cp_finish_decl): Clear runtime runtime initialization if
	in-class decl's initializer is bad.
	
	PR c++/21929
	* parser.c (struct cp_parser): Document that scope could be
	error_mark.
	(cp_parser_diagnose_invalid_type_name): Cope with error_mark for
	scope.
	(cp_parser_nested_name_specifier): Return NULL_TREE on error.
	(cp_parser_postfix_expression): Deal with null or error_mark
	scope.
	(cp_parser_elaborated_type_specifier): Adjust
	cp_parser_nested_name_specifier call.
	
	PR c++/20746
	* method.c (use_thunk): Protect covariant pointer return
	adjustments from NULL pointers.
	testsuite:
	PR c++/20678
	* g++.dg/other/crash-4.C: New.
	
	PR 21903
	* g++.dg/parse/defarg9.C: New.
	
	PR c++/21929
	* g++.dg/parse/crash26.C: New.
	
	PR c++/20789
	* g++.dg/init/member1.C: New.
	
	PR c++/20746
	* g++.dg/abi/covariant5.C: New.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.4648.2.63&r2=1.4648.2.64
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/class.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.707.2.3&r2=1.707.2.4
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.def.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.94.4.2&r2=1.94.4.3
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/cp-tree.h.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.1106.2.8&r2=1.1106.2.9
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.1371.2.14&r2=1.1371.2.15
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl2.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.770.2.2&r2=1.770.2.3
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/error.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.279.2.1&r2=1.279.2.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/method.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.322.4.4&r2=1.322.4.5
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parser.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.319.2.10&r2=1.319.2.11
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.978.2.12&r2=1.978.2.13
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.463.2.4&r2=1.463.2.5
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.5084.2.268&r2=1.5084.2.269
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/abi/covariant5.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=NONE&r2=1.1.10.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/member1.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=NONE&r2=1.1.10.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/other/crash-4.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=NONE&r2=1.1.8.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/overload/error1.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.2&r2=1.2.112.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/parse/crash26.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=NONE&r2=1.1.8.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/parse/defarg9.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=NONE&r2=1.1.10.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/parse/crash11.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.4&r2=1.4.28.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.old-deja/g++.benjamin/warn02.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.4&r2=1.4.76.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.old-deja/g++.brendan/arm2.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.3&r2=1.3.76.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.old-deja/g++.other/redecl2.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.3&r2=1.3.76.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.old-deja/g++.other/redecl4.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.2&r2=1.2.76.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.old-deja/g++.pt/memtemp78.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.3&r2=1.3.76.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20746