https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120602
Bug ID: 120602
Summary: ICE: in pp_string, at pretty-print.cc:2652
Product: gcc
Version: 16.0
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 pp_string 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-250601/libexec/gcc/x86_64-pc-linux-gnu/16.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc/configure --prefix=/root/gdbtest/gcc/gcc-250601
--enable-languages=c,c++ --disable-multilib --disable-bootstrap
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 16.0.0 20250601 (experimental) (GCC)
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Program:
#cat code.cpp
#include <coroutine>
struct dummy_coro {
using promise_type = dummy_coro;
bool await_ready() { return false; }
void await_suspend(std::coroutine_handle<>) { }
void await_resume() { }
dummy_coro get_return_object() { return {}; }
dummy_coro initial_suspend() { return {}; }
dummy_coro final_suspend() { return {}; }
void return_void() { }
void unhandled_exception() { }
};
template <int ...I>
dummy_coro foo() {
((co_await [](int){ return std::suspend_never{}; }(I)), ...);
co_return;
}
void bar() {
foo<1>();
}
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Command Lines:
gcc code.cpp -std=c++20 -pedantic -Wall -Wextra -Werror -O2 -c -o code_0.o
in pp_string, at pretty-print.cc:2652
0x282f2e5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x284d676 internal_error(char const*, ...)
???:0
0xadef02 fancy_abort(char const*, int, char const*)
???:0
0x287b11f pretty_printer::format(text_info&)
???:0
0x287fc23 pp_verbatim(pretty_printer*, char const*, ...)
???:0
0x284ad28 diagnostic_text_output_format::on_report_diagnostic(diagnostic_info
const&, diagnostic_t)
???:0
0x282ee36 diagnostic_context::report_diagnostic(diagnostic_info*)
???:0
0x282f2e5 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x284cf5f error_at(unsigned long, char const*, ...)
???:0
0xb7704c cp_coroutine_transform::wrap_original_function_body()
???:0
0xb79591 cp_coroutine_transform::apply_transforms()
???:0
0xbcfff7 finish_function(bool)
???:0
0xd5cb0d instantiate_decl(tree_node*, bool, bool)
???:0
0xd6c102 instantiate_pending_templates(int)
???:0
0xbec841 c_parse_final_cleanups()
???:0
0xe6c5f8 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://gcc.godbolt.org/z/6s7GeehKr
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