https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123493
Bug ID: 123493
Summary: ICE: error reporting routines re-entered via invalid
array alignment and sizeof syntax
Product: gcc
Version: 15.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: 522024330006 at smail dot nju.edu.cn
Target Milestone: ---
To reproduce: https://godbolt.org/z/9jedP46rf
Similar to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101070
GCC crashes with an ICE "error reporting routines re-entered" when attempting
to report errors on a code snippet involving an invalid array alignment (where
alignment is greater than element size) combined with a malformed sizeof
expression.
Program:
```
typedef short ashorts __attribute__((aligned(16)));
ashorts Kernshort[2][1];
int main() {
auto* p = &Kernshort[0 % sizeof(Kernshort/[])];
return 0;
}
```
Part of the traceback:
```
internal compiler error: error reporting routines re-entered.
0x291ad30
diagnostics::context::report_diagnostic(diagnostics::diagnostic_info*)
???:0
0x291af48 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x290eb89 error(char const*, ...)
???:0
0xc40ead pp_markup::element_quoted_type::print_type(pp_markup::context&)
???:0
0xb50eb0 pp_markup::element_quoted_type::add_to_phase_2(pp_markup::context&)
???:0
0x297d001 pretty_printer::format(text_info&)
???:0
0x291a843
diagnostics::context::report_diagnostic(diagnostics::diagnostic_info*)
???:0
0x291af48 diagnostics::context::diagnostic_impl(rich_location*,
diagnostics::metadata const*, diagnostics::option_id, char const*,
__va_list_tag (*) [1], diagnostics::kind)
???:0
0x290f306 error_at(rich_location*, char const*, ...)
???:0
0xb4fed7 build_new_op(op_location_t const&, tree_code, int, tree_node*,
tree_node*, tree_node*, tree_node*, tree_node**, int)
???:0
0xe1ea42 build_x_binary_op(op_location_t const&, tree_code, tree_node*,
tree_code, tree_node*, tree_code, tree_node*, tree_node**, int)
???:0
0xd542e3 c_parse_file()
???:0
0xec5d19 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.
```
