[Bug c++/71229] New: cinternal compiler error: Segmentation fault, when copying an array in a constexpr function

[gcc at tnix dot eu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71229

            Bug ID: 71229
           Summary: cinternal compiler error: Segmentation fault, when
                    copying an array in a constexpr function
           Product: gcc
           Version: 6.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gcc at tnix dot eu
  Target Milestone: ---

Created attachment 38543
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38543&action=edit
consexpr function which causes segmentation fault

I tried some constexpr things and got a Segmentation fault error while copying
values from one array into another one in a constexpr function. G++ only
crashes when a loop is used.

I tried g++ versions from 5.1 to 6.1 and all crash with the same error.

Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/6.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ./configure --disable-multilib
Thread model: posix
gcc version 6.1.0 (GCC) 
COLLECT_GCC_OPTIONS='-save-temps' '-v' '-Wall' '-Wextra' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 /usr/local/libexec/gcc/x86_64-pc-linux-gnu/6.1.0/cc1plus -E -quiet -v
-imultiarch x86_64-linux-gnu -D_GNU_SOURCE ../main.cpp -mtune=generic
-march=x86-64 -Wall -Wextra -fpch-preprocess -o main.ii
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory
"/usr/local/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0

/usr/local/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/x86_64-pc-linux-gnu

/usr/local/lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/backward
 /usr/local/lib/gcc/x86_64-pc-linux-gnu/6.1.0/include
 /usr/local/include
 /usr/local/lib/gcc/x86_64-pc-linux-gnu/6.1.0/include-fixed
 /usr/include/x86_64-linux-gnu
 /usr/include
End of search list.
COLLECT_GCC_OPTIONS='-save-temps' '-v' '-Wall' '-Wextra' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
 /usr/local/libexec/gcc/x86_64-pc-linux-gnu/6.1.0/cc1plus -fpreprocessed
main.ii -quiet -dumpbase main.cpp -mtune=generic -march=x86-64 -auxbase main
-Wall -Wextra -version -o main.s
GNU C++14 (GCC) version 6.1.0 (x86_64-pc-linux-gnu)
        compiled by GNU C version 6.1.0, GMP version 6.0.0, MPFR version 3.1.3,
MPC version 1.0.3, isl version none
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.3 differs from library version 3.1.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++14 (GCC) version 6.1.0 (x86_64-pc-linux-gnu)
        compiled by GNU C version 6.1.0, GMP version 6.0.0, MPFR version 3.1.3,
MPC version 1.0.3, isl version none
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.3 differs from library version 3.1.4.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 3fe170657c23224ae08f3be42e7c013e
../main.cpp: In function ‘int main(int, char**)’:
../main.cpp:33:27:   in constexpr expansion of ‘array(text)’
../main.cpp:33:32: internal compiler error: Segmentation fault
  constexpr int sum = array(text);
                                ^
0xabbfff crash_signal
        ../.././gcc/toplev.c:333
0x6eee95 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3907
0x6f3c88 cxx_eval_binary_expression
        ../.././gcc/cp/constexpr.c:1725
0x6eebd2 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3806
0x6f3c88 cxx_eval_binary_expression
        ../.././gcc/cp/constexpr.c:1725
0x6eebd2 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3806
0x6eee88 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3901
0x6f15d1 cxx_eval_store_expression
        ../.././gcc/cp/constexpr.c:3123
0x6ef31c cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3633
0x6eee88 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3901
0x6ef105 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3672
0x6ef105 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3672
0x6f1fc1 cxx_eval_statement_list
        ../.././gcc/cp/constexpr.c:3330
0x6ef21d cxx_eval_loop_expr
        ../.././gcc/cp/constexpr.c:3362
0x6ef21d cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:4025
0x6f1fc1 cxx_eval_statement_list
        ../.././gcc/cp/constexpr.c:3330
0x6ef0a4 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3959
0x6efb10 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:4014
0x6f1fc1 cxx_eval_statement_list
        ../.././gcc/cp/constexpr.c:3330
0x6ef0a4 cxx_eval_constant_expression
        ../.././gcc/cp/constexpr.c:3959