https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117806
Bug ID: 117806
Summary: ICE: in composite_type_internal, at c/c-typeck.cc:825
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: iamanonymous.cs at gmail dot com
Target Milestone: ---
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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.
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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
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# 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)
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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}};
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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
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Also ICE on trunk, compiler explorer:https://godbolt.org/z/bs61PsxGP
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