This is GCC Bugzilla
This is GCC Bugzilla Version 2.20+
View Bug Activity | Format For Printing | Clone This Bug
When sizeof is applied to incomplete type, gcc 3.4 does not report the name of the class sizeof was applied to. For example: class C; int main() { sizeof(C); return 0; } produces: sizeof.cpp:4: `sizeof' applied to incomplete type `C' with 3.2, but sizeof.cpp:4: error: invalid application of `sizeof' to an incomplete type with 3.4 This change considerably impacts usability of the Boost.static_assert library: http://www.boost.org/libs/static_assert/static_assert.htm since the library attempts to generate error message that is highly visible in the compiler output and applies sizeof to BOOST_STATIC_ASSERT_FAILURE class for that purpose. With current diagnostics, static assertion failure -- which is the first thing user should be looking at -- is hidden between other errors and instantination stack, which makes static asserts much less usefull.
Confirmed a regression from 3.2.3.
Working on a fix.
Subject: Bug 15337 CVSROOT: /cvs/gcc Module name: gcc Branch: gcc-3_4-branch Changes by: mmitchel@gcc.gnu.org 2004-06-07 15:52:23 Modified files: gcc : ChangeLog c-common.c gcc/cp : ChangeLog except.c parser.c pt.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/eh: throw1.C gcc/testsuite/g++.dg/expr: sizeof3.C gcc/testsuite/g++.dg/template: access14.C enum1.C Log message: PR c++/15337 * error.c (c_sizeof_or_alignof_type): Use more detailed error message. PR c++/15766 * parser.c (cp_parser_iteration_statement): Fix typo in error message. PR c++/14777 * pt.c (tsubst_default_argument): Do not defer access checks while substituting into the default argument. PR c++/15554 * pt.c (tsubst_copy): Do not try to substitute for an enumeration constant in a non-dependent context. PR c++/15057 * except.c (build_throw): Ensure that temp_expr has been initialized. PR c++/15337 * g++.dg/expr/sizeof3.C: New test. PR c++/14777 * g++.dg/template/access14.C: New test. PR c++/15554 * g++.dg/template/enum1.C: New test. PR c++/15057 * g++.dg/eh/throw1.C: New test. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=2.2326.2.470&r2=2.2326.2.471 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-common.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.476.4.6&r2=1.476.4.7 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3892.2.115&r2=1.3892.2.116 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/except.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.164.4.4&r2=1.164.4.5 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parser.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.157.2.31&r2=1.157.2.32 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.816.2.28&r2=1.816.2.29 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3389.2.197&r2=1.3389.2.198 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/eh/throw1.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/expr/sizeof3.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/access14.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/enum1.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1
Subject: Bug 15337 CVSROOT: /cvs/gcc Module name: gcc Changes by: mmitchel@gcc.gnu.org 2004-06-07 15:54:15 Modified files: gcc : ChangeLog c-common.c gcc/cp : ChangeLog except.c parser.c pt.c gcc/testsuite : ChangeLog Added files: gcc/testsuite/g++.dg/eh: throw1.C gcc/testsuite/g++.dg/expr: sizeof3.C gcc/testsuite/g++.dg/template: access14.C enum1.C Log message: PR c++/15337 * error.c (c_sizeof_or_alignof_type): Use more detailed error message. PR c++/15766 * parser.c (cp_parser_iteration_statement): Fix typo in error message. PR c++/14777 * pt.c (tsubst_default_argument): Do not defer access checks while substituting into the default argument. PR c++/15554 * pt.c (tsubst_copy): Do not try to substitute for an enumeration constant in a non-dependent context. PR c++/15057 * except.c (build_throw): Ensure that temp_expr has been initialized. PR c++/15337 * g++.dg/expr/sizeof3.C: New test. PR c++/14777 * g++.dg/template/access14.C: New test. PR c++/15554 * g++.dg/template/enum1.C: New test. PR c++/15057 * g++.dg/eh/throw1.C: New test. Patches: http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.3859&r2=2.3860 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-common.c.diff?cvsroot=gcc&r1=1.509&r2=1.510 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.4083&r2=1.4084 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/except.c.diff?cvsroot=gcc&r1=1.167&r2=1.168 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parser.c.diff?cvsroot=gcc&r1=1.200&r2=1.201 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/pt.c.diff?cvsroot=gcc&r1=1.859&r2=1.860 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3816&r2=1.3817 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/eh/throw1.C.diff?cvsroot=gcc&r1=1.1&r2=1.2 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/expr/sizeof3.C.diff?cvsroot=gcc&r1=1.1&r2=1.2 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/access14.C.diff?cvsroot=gcc&r1=1.1&r2=1.2 http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/enum1.C.diff?cvsroot=gcc&r1=1.1&r2=1.2
Fixed in GCC 3.4.1.