https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98332
Bug ID: 98332
Summary: [10/11 Regression] ICE in unshare_constructor, at
cp/constexpr.c:1527
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Changed between 20190609 and 20190616 :
$ cat z1.cc
struct S { int a = 2147483647 + 1; };
struct { S b[2][1][1][1]; } c;
$ cat z2.cc
#include <limits.h>
struct S { int a = INT_MAX + 1; };
struct { S b[2][1][1][1]; } c;
$ g++-11-20201213 -c z1.cc
z1.cc:1:31: warning: integer overflow in expression of type 'int' results in
'-2147483648' [-Woverflow]
1 | struct S { int a = 2147483647 + 1; };
| ~~~~~~~~~~~^~~
z1.cc:2:29: in 'constexpr' expansion of 'c.<unnamed struct>::<constructor>()'
z1.cc:2:29: internal compiler error: Segmentation fault
2 | struct { S b[2][1][1][1]; } c;
| ^
0xc8f5ff crash_signal
../../gcc/toplev.c:327
0x67c3e8 unshare_constructor(tree_node*)
../../gcc/cp/constexpr.c:1527
0x68a51a cxx_eval_vec_init_1
../../gcc/cp/constexpr.c:4575
0x681d76 cxx_eval_vec_init
../../gcc/cp/constexpr.c:4599
0x681d76 cxx_eval_constant_expression
../../gcc/cp/constexpr.c:6584
0x6883c8 cxx_eval_store_expression
../../gcc/cp/constexpr.c:5406
0x6811ca cxx_eval_constant_expression
../../gcc/cp/constexpr.c:6226
0x680737 cxx_eval_constant_expression
../../gcc/cp/constexpr.c:6609
0x680b8c cxx_eval_constant_expression
../../gcc/cp/constexpr.c:6284
0x680cde cxx_eval_constant_expression
../../gcc/cp/constexpr.c:6295
0x680d70 cxx_eval_constant_expression
../../gcc/cp/constexpr.c:6788
0x67f58f cxx_eval_call_expression
../../gcc/cp/constexpr.c:2701
0x680f5a cxx_eval_constant_expression
../../gcc/cp/constexpr.c:6117
0x683eab cxx_eval_outermost_constant_expr
../../gcc/cp/constexpr.c:7126
0x686e7f maybe_constant_init_1
../../gcc/cp/constexpr.c:7578
0x6ea7b6 expand_default_init
../../gcc/cp/init.c:1998
0x6ea7b6 expand_aggr_init_1
../../gcc/cp/init.c:2101
0x6ec475 build_aggr_init(tree_node*, tree_node*, int, int)
../../gcc/cp/init.c:1835
0x6cb20d build_aggr_init_full_exprs
../../gcc/cp/decl.c:6803
0x6cb20d check_initializer
../../gcc/cp/decl.c:6964
