https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112658
Bug ID: 112658
Summary: ICE: finish_expr_stmt , at cp/semantics.cc:892
Product: gcc
Version: 13.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: julia.desmazes at gmail dot com
Target Milestone: ---
Created attachment 56664
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56664&action=edit
preprocessed file ( ii )
Hello,
I have come across an internal compiler error when using g++ 13.2.1.
The error occurs when casting a temporary array into a pointer and forwarding
the result to a constructor.
Code to reproduce :
```
#include <stdint.h>
#include <iostream>
#include <cstring>
#define DEFAULT_DST_MAC ((uint8_t[6]) { 0xFC, 0xFC, 0x48, 0, 0, 0})
class foo{
public:
foo(const uint8_t new_mac[6]){
std::cout << new_mac << std::endl;
memcpy(&this->mac, new_mac, 6);
}
private:
uint8_t mac[6];
};
int main(){
foo f((uint8_t*)DEFAULT_DST_MAC);
return 0;
}
```
Console log for `g++ -v -c main.cpp -freport-bug -save-temps` :
```
Using built-in specs.
COLLECT_GCC=g++
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure
--enable-languages=ada,c,c++,d,fortran,go,lto,objc,obj-c++ --enable-bootstrap
--prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/
--with-build-config=bootstrap-lto --with-linker-hash-style=gnu
--with-system-zlib --enable-__cxa_atexit --enable-cet=auto
--enable-checking=release --enable-clocale=gnu --enable-default-pie
--enable-default-ssp --enable-gnu-indirect-function --enable-gnu-unique-object
--enable-libstdcxx-backtrace --enable-link-serialization=1
--enable-linker-build-id --enable-lto --enable-multilib --enable-plugin
--enable-shared --enable-threads=posix --disable-libssp --disable-libstdcxx-pch
--disable-werror
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.2.1 20230801 (GCC)
COLLECT_GCC_OPTIONS='-v' '-c' '-freport-bug' '-save-temps' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/13.2.1/cc1plus -E -quiet -v -D_GNU_SOURCE
main.cpp -mtune=generic -march=x86-64 -freport-bug -fpch-preprocess -o main.ii
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-pc-linux-gnu/13.2.1/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-pc-linux-gnu/13.2.1/../../../../include/c++/13.2.1
/usr/lib/gcc/x86_64-pc-linux-gnu/13.2.1/../../../../include/c++/13.2.1/x86_64-pc-linux-gnu
/usr/lib/gcc/x86_64-pc-linux-gnu/13.2.1/../../../../include/c++/13.2.1/backward
/usr/lib/gcc/x86_64-pc-linux-gnu/13.2.1/include
/usr/local/include
/usr/lib/gcc/x86_64-pc-linux-gnu/13.2.1/include-fixed
/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-c' '-freport-bug' '-save-temps' '-shared-libgcc'
'-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-linux-gnu/13.2.1/cc1plus -fpreprocessed main.ii -quiet
-dumpbase main.cpp -dumpbase-ext .cpp -mtune=generic -march=x86-64 -version
-freport-bug -o main.s
GNU C++17 (GCC) version 13.2.1 20230801 (x86_64-pc-linux-gnu)
compiled by GNU C version 13.2.1 20230801, GMP version 6.3.0, MPFR
version 4.2.0-p12, MPC version 1.3.1, isl version isl-0.26-GMP
warning: MPFR header version 4.2.0-p12 differs from library version 4.2.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 5a490a353c29b926850bca65a518c219
main.cpp: In function ‘int main()’:
main.cpp:18:68: internal compiler error: in finish_expr_stmt, at
cp/semantics.cc:892
18 | foo f((uint8_t*)DEFAULT_DST_MAC);
| ^
0x1ad33c8 internal_error(char const*, ...)
???:0
0x6b7b63 fancy_abort(char const*, int, char const*)
???:0
0x76527f cp_finish_decl(tree_node*, tree_node*, bool, tree_node*, int)
???:0
0x9443d0 c_common_parse_file()
???:0
Please submit a full bug report, with preprocessed source.
Please include the complete backtrace with any bug report.
See <https://bugs.archlinux.org/> for instructions.
Preprocessed source stored into /tmp/ccJZigsM.out file, please attach this to
your bugreport.
make: *** [makefile:10: main.o] Error 1
```
If needed, the `ccJZigsM.out` file can be found in the following git :
https://github.com/Essenceia/gcc_bug
I will be happy to provide any additional files if needed.
Regards,
Julia Desmazes
