From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 120307 invoked by alias); 3 Oct 2015 10:13:43 -0000 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org Received: (qmail 120168 invoked by uid 48); 3 Oct 2015 10:13:39 -0000 From: "miyuki at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/67831] Internal error on complicated constexpr initialization. Date: Sat, 03 Oct 2015 10:13:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: 4.9.3 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: miyuki at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status cf_reconfirmed_on cc everconfirmed cf_known_to_fail Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-10/txt/msg00237.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67831 Mikhail Maltsev changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-10-03 CC| |miyuki at gcc dot gnu.org Ever confirmed|0 |1 Known to fail| |6.0 --- Comment #1 from Mikhail Maltsev --- This also reproduces on x86_64 trunk. Probably related to PR 67398. $ cat main2.cc struct Task { struct TaskStaticData { constexpr TaskStaticData() {} } const &tsd; constexpr Task() : tsd(TaskStaticData()) {} }; Task tasks{Task()}; $ cc1plus main2.cc main2.cc: In function 'void __static_initialization_and_destruction_0(int, int)': main2.cc:8:6: internal compiler error: in make_decl_rtl, at varasm.c:1306 Task tasks{Task()}; ^ 0xf5c1d5 make_decl_rtl(tree_node*) /home/miyuki/gcc/src/gcc/varasm.c:1302 0x9d4378 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) /home/miyuki/gcc/src/gcc/expr.c:9550 0x9de576 expand_expr /home/miyuki/gcc/src/gcc/expr.h:255 0x9de576 expand_expr_addr_expr_1 /home/miyuki/gcc/src/gcc/expr.c:7601 0x9d2931 expand_expr_addr_expr /home/miyuki/gcc/src/gcc/expr.c:7721 0x9d2931 expand_expr_real_1(tree_node*, rtx_def*, machine_mode, expand_modifier, rtx_def**, bool) /home/miyuki/gcc/src/gcc/expr.c:10709 0x9df24f store_expr_with_bounds(tree_node*, rtx_def*, int, bool, tree_node*) /home/miyuki/gcc/src/gcc/expr.c:5399 0x9e1825 expand_assignment(tree_node*, tree_node*, bool) /home/miyuki/gcc/src/gcc/expr.c:5171 0x8d3358 expand_gimple_stmt_1 /home/miyuki/gcc/src/gcc/cfgexpand.c:3584 0x8d3358 expand_gimple_stmt /home/miyuki/gcc/src/gcc/cfgexpand.c:3680 0x8d5906 expand_gimple_basic_block /home/miyuki/gcc/src/gcc/cfgexpand.c:5684 0x8dbee6 execute /home/miyuki/gcc/src/gcc/cfgexpand.c:6296 Please submit a full bug report, with preprocessed source if appropriate. Please include the complete backtrace with any bug report. See for instructions. clang++ -S -std=c++11 main2.cc main2.cc:5:26: warning: binding reference member 'tsd' to a temporary value [-Wdangling-field] constexpr Task() : tsd(TaskStaticData()) {} ^~~~~~~~~~~~~~~~ main2.cc:4:12: note: reference member declared here } const &tsd; ^ 1 warning generated.