https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115930
Bug ID: 115930
Summary: ICE: tree check: expected type_argument_pack or
nontype_argument_pack, have integer_type in
template_parm_natural_p, at cp/mangle.cc:1828
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: ---
Target: x86_64
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The compiler produces an internal error during tree_check_failed 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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# g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/root/gdbtest/gcc/gcc-15/libexec/gcc/x86_64-pc-linux-gnu/15.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /root/gdbtest/gcc/obj/../gcc/configure
--prefix=/root/gdbtest/gcc/gcc-15 --enable-languages=c,c++,fortran,go
--disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20240509 (experimental) (GCC)
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Program:
# cat source_code_1.cpp
#include <iostream>
template <auto... Refs>
struct MemPtrList {};
struct X {
int a;
};
template <typename T>
int bar () {
std::cout << "bar" << std::endl;
return 42;
}
template <typename... SubPtrTypes, SubPtrTypes X::*...SubRefs>
void foo (MemPtrList<SubRefs...>) {
// Version 1 (miscompile)
int dummy [] = { bar<SubPtrTypes> () ... };
// Version 2 (ICE)
// (bar<SubPtrTypes> (), ...);
}
int main () {
foo (MemPtrList<&X::a> {});
}
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Command Lines:
# g++ source_code_1.cpp -O2 -Wall -Wextra -pedantic -std=c++20
-fno-exceptions -fno-rtti -fstrict-aliasing -Wshadow -Wnon-virtual-dtor
-Wold-style-cast -Wcast-align -Woverloaded-virtual -Wconversion
-Wsign-conversion -Wduplicated-cond -Wduplicated-branches -Wlogical-op
-Wnull-dereference -Wuseless-cast -Wdouble-promotion -Wformat=2
-fconcepts-diagnostics-depth=2 -o source_code_1.o
source_code_1.cpp: In function ‘int bar()’:
source_code_1.cpp:11:14: error: ‘cout’ is not a member of ‘std’
11 | std::cout << "bar" << std::endl;
| ^~~~
source_code_1.cpp:1:1: note: ‘std::cout’ is defined in header ‘<iostream>’;
this is probably fixable by adding ‘#include <iostream>’
+++ |+#include <iostream>
1 |
source_code_1.cpp:11:36: error: ‘endl’ is not a member of ‘std’
11 | std::cout << "bar" << std::endl;
| ^~~~
source_code_1.cpp:1:1: note: ‘std::endl’ is defined in header ‘<ostream>’; this
is probably fixable by adding ‘#include <ostream>’
+++ |+#include <ostream>
1 |
source_code_1.cpp: In instantiation of ‘void foo(MemPtrList<SubRefs ...>) [with
SubPtrTypes = int; SubPtrTypes X::* ...SubRefs = {&X::a}]’:
source_code_1.cpp:25:6: required from here
25 | foo (MemPtrList<&X::a> {});
| ~~~~^~~~~~~~~~~~~~~~~~~~~~
source_code_1.cpp:18:13: warning: unused variable ‘dummy’ [-Wunused-variable]
18 | int dummy [] = { bar<SubPtrTypes> () ... };
| ^~~~~
source_code_1.cpp: In instantiation of ‘void foo(MemPtrList<SubRefs ...>) [with
SubPtrTypes = int; SubPtrTypes X::* ...SubRefs = {&X::a}]’:
source_code_1.cpp:16:6: internal compiler error: tree check: expected
type_argument_pack or nontype_argument_pack, have integer_type in
template_parm_natural_p, at cp/mangle.cc:1828
16 | void foo (MemPtrList<SubRefs...>) {
| ^~~
0x99e2c3 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/root/gdbtest/gcc/obj/../gcc/gcc/tree.cc:8995
0x7f561c tree_check2(tree_node*, char const*, int, char const*, tree_code,
tree_code)
/root/gdbtest/gcc/obj/../gcc/gcc/tree.h:3643
0x7f561c template_parm_natural_p
/root/gdbtest/gcc/obj/../gcc/gcc/cp/mangle.cc:1828
0x7f561c write_template_args
/root/gdbtest/gcc/obj/../gcc/gcc/cp/mangle.cc:3224
0xbc5276 write_encoding
/root/gdbtest/gcc/obj/../gcc/gcc/cp/mangle.cc:938
0xbc541b write_mangled_name
/root/gdbtest/gcc/obj/../gcc/gcc/cp/mangle.cc:820
0xbcb4e0 mangle_decl_string
/root/gdbtest/gcc/obj/../gcc/gcc/cp/mangle.cc:4420
0xbcb6ca get_mangled_id
/root/gdbtest/gcc/obj/../gcc/gcc/cp/mangle.cc:4441
0xbcb6ca mangle_decl(tree_node*)
/root/gdbtest/gcc/obj/../gcc/gcc/cp/mangle.cc:4479
0x16bc0fd decl_assembler_name(tree_node*)
/root/gdbtest/gcc/obj/../gcc/gcc/tree.cc:719
0xeaaac1 symtab_node::get_comdat_group_id()
/root/gdbtest/gcc/obj/../gcc/gcc/cgraph.h:258
0xeaaac1 analyze_functions
/root/gdbtest/gcc/obj/../gcc/gcc/cgraphunit.cc:1203
0xeac22d symbol_table::finalize_compilation_unit()
/root/gdbtest/gcc/obj/../gcc/gcc/cgraphunit.cc:2560
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.
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Also ICE on trunk, compiler explorer:https://godbolt.org/z/7cj75MYWh
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