https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117806
--- Comment #1 from Anonymous <iamanonymous.cs at gmail dot com> ---
(In reply to Anonymous from comment #0)
> *****************************************************************************
> **
> The compiler produces an internal error during get_len when compiling the
> provided code with the specified options.
> The issue can also be reproduced on Compiler Explorer.
>
> *****************************************************************************
> **
> OS and Platform:
> # uname -a
> Linux ubuntu 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023
> x86_64 x86_64 x86_64 GNU/Linux
> *****************************************************************************
> **
> # gcc -v
> Using built-in specs.
> COLLECT_GCC=gcc
> COLLECT_LTO_WRAPPER=/root/gdbtest/gcc/gcc-241127/libexec/gcc/x86_64-pc-linux-
> gnu/15.0.0/lto-wrapper
> Target: x86_64-pc-linux-gnu
> Configured with: ../gcc/configure --prefix=/root/gdbtest/gcc/gcc-241127
> --enable-languages=c,c++ --disable-multilib --disable-bootstrap
> Thread model: posix
> Supported LTO compression algorithms: zlib
> gcc version 15.0.0 20241127 (experimental) (GCC)
> *****************************************************************************
> **
> Program:
> # cat bug.c
>
>
> struct Test {
> double D __attribute__((packed,aligned(4)));
> short X;
> };
>
> struct Test {
> double D __attribute__((packed,aligned(4)));
> short X;
> };
>
> struct {
> char x;
> struct Test t;
> } b = { 1, { 2, 3}};
>
> struct Test {
> double D __attribute__((packed,aligned(4)));
> short X;
> } x;
>
> struct {
> char x;
> struct Test t;
> } b = { 1, { 2, 3}};
>
> struct Test {
> double D __attribute__((packed,aligned(4)));
> short X;
> } x;
>
> struct {
> char x;
> struct Test t;
> } b = { 1, { 2, 3}};
>
> struct Test {
> double D __attribute__((packed,aligned(4)));
> short X;
> } x;
>
> struct {
> char x;
> struct Test t;
> } b = { 1, { 2, 3}};
>
>
> *****************************************************************************
> **
> Command Lines:
> # gcc bug.c -funroll-loops -flto -O2 -Wall -Wextra -fno-strict-aliasing
> -fwrapv -g -fsanitize=address -c -o bug.o
>
> <source>:24:3: error: conflicting types for 'b'; have 'struct <anonymous>'
> 24 | } b = { 1, { 2, 3}};
> | ^
> <source>:14:3: note: previous definition of 'b' with type 'struct
> <anonymous>'
> 14 | } b = { 1, { 2, 3}};
> | ^
> <source>:34:3: error: conflicting types for 'b'; have 'struct <anonymous>'
> 34 | } b = { 1, { 2, 3}};
> | ^
> <source>:14:3: note: previous definition of 'b' with type 'struct
> <anonymous>'
> 14 | } b = { 1, { 2, 3}};
> | ^
> <source>:39:1: internal compiler error: in composite_type_internal, at
> c/c-typeck.cc:825
> 39 | } x;
> | ^
> 0x25c00b5 diagnostic_context::diagnostic_impl(rich_location*,
> diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
> (*) [1], diagnostic_t)
> ???:0
> 0x25d6da5 internal_error(char const*, ...)
> ???:0
> 0x9b7794 fancy_abort(char const*, int, char const*)
> ???:0
> 0xa093c2 composite_type(tree_node*, tree_node*)
> ???:0
> 0x9de78a pushdecl(tree_node*)
> ???:0
> 0x9f3211 start_decl(c_declarator*, c_declspecs*, bool, tree_node*, bool,
> unsigned int*)
> ???:0
> 0xa7900b c_parse_file()
> ???:0
> 0xaf5a59 c_common_parse_file()
> ???:0
> Please submit a full bug report, with preprocessed source (by using
> -freport-bug).
> Please include the complete backtrace with any bug report.
> See <https://gcc.gnu.org/bugs/> for instructions.
> Compiler returned: 1
> *****************************************************************************
> **
>
> Also ICE on trunk, compiler explorer:https://godbolt.org/z/bs61PsxGP
>
> *****************************************************************************
> **
My mistake,the compiler produces an internal error during
composite_type_internal when compiling the provided code with the specified
options.
