https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115469
Bug ID: 115469
Summary: ICE :tree check expected class 'type', have
'exceptional' (error_mark) in poplevel_named_label_1,
at cpdecl.cc579
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
*******************************************************************************
I encountered an internal compiler error (ICE) while compiling the following
code snippet using GCC trunk with the provided compilation options.
The ICE occurred in poplevel_named_label_1 at cp/decl.cc:579.
The issue can also be reproduced on Compiler Explorer.
Please let me know if you need any further information to resolve this issue.
*******************************************************************************
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
*******************************************************************************
# 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)
*******************************************************************************
Program:
# cat 1.ii
int fn1() { int **c; b = &&c; goto * 0}
*******************************************************************************
Command Lines:
# g++ 1.ii -O3 -Wall -Wextra -std=c11 -pedantic -fsanitize=undefined
-fstack-protector-all -D_FORTIFY_SOURCE=2 -freport-bug -o -c 1.o
cc1plus: warning: command-line option ‘-std=c11’ is valid for C/ObjC but not
for C++
1.ii: In function ‘int fn1()’:
1.ii:1:22: error: ‘b’ was not declared in this scope
1 | int fn1() { int **c; b = &&c; goto * 0}
| ^
1.ii:1:28: warning: taking the address of a label is non-standard [-Wpedantic]
1 | int fn1() { int **c; b = &&c; goto * 0}
| ^
1.ii:1:33: warning: ISO C++ forbids computed gotos [-Wpedantic]
1 | int fn1() { int **c; b = &&c; goto * 0}
| ^~~~
1.ii:1:41: error: expected ‘;’ before ‘}’ token
1 | int fn1() { int **c; b = &&c; goto * 0}
| ^
| ;
1.ii:1:41: internal compiler error: tree check: expected class ‘type’, have
‘exceptional’ (error_mark) in poplevel_named_label_1, at cp/decl.cc:579
0x99e778 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
/root/gdbtest/gcc/obj/../gcc/gcc/tree.cc:9045
0x7d7cca tree_class_check(tree_node*, tree_code_class, char const*, int, char
const*)
/root/gdbtest/gcc/obj/../gcc/gcc/tree.h:3779
0x7d7cca poplevel_named_label_1(named_label_entry**, cp_binding_level*)
/root/gdbtest/gcc/obj/../gcc/gcc/cp/decl.cc:579
0xb735f8 void hash_table<named_label_hash, false,
xcallocator>::traverse_noresize<cp_binding_level*,
&(poplevel_named_label_1(named_label_entry**,
cp_binding_level*))>(cp_binding_level*)
/root/gdbtest/gcc/obj/../gcc/gcc/cp/decl.cc:650
0xb735f8 void hash_table<named_label_hash, false,
xcallocator>::traverse<cp_binding_level*,
&(poplevel_named_label_1(named_label_entry**,
cp_binding_level*))>(cp_binding_level*)
/root/gdbtest/gcc/obj/../gcc/gcc/hash-table.h:1194
0xb735f8 poplevel(int, int, int)
/root/gdbtest/gcc/obj/../gcc/gcc/cp/decl.cc:650
0xd04842 do_poplevel(tree_node*)
/root/gdbtest/gcc/obj/../gcc/gcc/cp/semantics.cc:651
0xd07599 finish_compound_stmt(tree_node*)
/root/gdbtest/gcc/obj/../gcc/gcc/cp/semantics.cc:1996
0xc59a4c cp_parser_compound_statement
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:13287
0xc7ccd5 cp_parser_function_body
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:26072
0xc7ccd5 cp_parser_ctor_initializer_opt_and_function_body
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:26123
0xc8241e cp_parser_function_definition_after_declarator
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:32903
0xc835be cp_parser_function_definition_from_specifiers_and_declarator
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:32820
0xc835be cp_parser_init_declarator
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:23451
0xc5668f cp_parser_simple_declaration
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:15958
0xc8ffea cp_parser_declaration
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:15631
0xc90fea cp_parser_toplevel_declaration
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:15652
0xc90fea cp_parser_translation_unit
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:5284
0xc90fea c_parse_file()
/root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:51440
0xddf371 c_common_parse_file()
/root/gdbtest/gcc/obj/../gcc/gcc/c-family/c-opts.cc:1311
Please submit a full bug report, with preprocessed source.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Preprocessed source stored into /tmp/cc5sFDUL.out file, please attach this to
your bugreport.
*******************************************************************************
#cat /tmp/cc5sFDUL.out
// 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)
//
// -fpreprocessed: warning: command-line option ‘-std=c11’ is valid for C/ObjC
but not for C++
// 1.ii: In function ‘int fn1()’:
// 1.ii:1:22: error: ‘b’ was not declared in this scope
// 1 | int fn1() { int **c; b = &&c; goto * 0}
// | ^
// 1.ii:1:28: warning: taking the address of a label is non-standard
[-Wpedantic]
// 1 | int fn1() { int **c; b = &&c; goto * 0}
// | ^
// 1.ii:1:33: warning: ISO C++ forbids computed gotos [-Wpedantic]
// 1 | int fn1() { int **c; b = &&c; goto * 0}
// | ^~~~
// 1.ii:1:41: error: expected ‘;’ before ‘}’ token
// 1 | int fn1() { int **c; b = &&c; goto * 0}
// | ^
// | ;
// 1.ii:1:41: internal compiler error: tree check: expected class ‘type’, have
‘exceptional’ (error_mark) in poplevel_named_label_1, at cp/decl.cc:579
// 0x99e778 tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
// /root/gdbtest/gcc/obj/../gcc/gcc/tree.cc:9045
// 0x7d7cca tree_class_check(tree_node*, tree_code_class, char const*, int,
char const*)
// /root/gdbtest/gcc/obj/../gcc/gcc/tree.h:3779
// 0x7d7cca poplevel_named_label_1(named_label_entry**, cp_binding_level*)
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/decl.cc:579
// 0xb735f8 void hash_table<named_label_hash, false,
xcallocator>::traverse_noresize<cp_binding_level*,
&(poplevel_named_label_1(named_label_entry**,
cp_binding_level*))>(cp_binding_level*)
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/decl.cc:650
// 0xb735f8 void hash_table<named_label_hash, false,
xcallocator>::traverse<cp_binding_level*,
&(poplevel_named_label_1(named_label_entry**,
cp_binding_level*))>(cp_binding_level*)
// /root/gdbtest/gcc/obj/../gcc/gcc/hash-table.h:1194
// 0xb735f8 poplevel(int, int, int)
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/decl.cc:650
// 0xd04842 do_poplevel(tree_node*)
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/semantics.cc:651
// 0xd07599 finish_compound_stmt(tree_node*)
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/semantics.cc:1996
// 0xc59a4c cp_parser_compound_statement
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:13287
// 0xc7ccd5 cp_parser_function_body
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:26072
// 0xc7ccd5 cp_parser_ctor_initializer_opt_and_function_body
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:26123
// 0xc8241e cp_parser_function_definition_after_declarator
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:32903
// 0xc835be cp_parser_function_definition_from_specifiers_and_declarator
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:32820
// 0xc835be cp_parser_init_declarator
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:23451
// 0xc5668f cp_parser_simple_declaration
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:15958
// 0xc8ffea cp_parser_declaration
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:15631
// 0xc90fea cp_parser_toplevel_declaration
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:15652
// 0xc90fea cp_parser_translation_unit
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:5284
// 0xc90fea c_parse_file()
// /root/gdbtest/gcc/obj/../gcc/gcc/cp/parser.cc:51440
// 0xddf371 c_common_parse_file()
// /root/gdbtest/gcc/obj/../gcc/gcc/c-family/c-opts.cc:1311
// Please submit a full bug report, with preprocessed source.
// Please include the complete backtrace with any bug report.
// See <https://gcc.gnu.org/bugs/> for instructions.
// /root/gdbtest/gcc/gcc-15/libexec/gcc/x86_64-pc-linux-gnu/15.0.0/cc1plus
-fpreprocessed 1.ii -quiet -dumpdir -c- -dumpbase 1.ii -dumpbase-ext .ii
-mtune=generic -march=x86-64 -O3 -Wall -Wextra -Wpedantic -std=c11
-fsanitize=undefined -fstack-protector-all -freport-bug -o - -frandom-seed=0
-fdump-noaddr
# 0 "1.ii"
# 0 "<built-in>"
# 0 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 0 "<command-line>" 2
# 1 "1.ii"
int fn1() { int **c; b = &&c; goto * 0}
*******************************************************************************
Also ICE on trunk, compiler explorer:https://godbolt.org/z/jWYrKcqo6
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