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* [Bug c++/95927] New: ICE in cp_lexer_new_from_tokens, at cp/parser.c:701
@ 2020-06-27 2:21 haoxintu at gmail dot com
2020-07-03 4:17 ` [Bug c++/95927] " haoxintu at gmail dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: haoxintu at gmail dot com @ 2020-06-27 2:21 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95927
Bug ID: 95927
Summary: ICE in cp_lexer_new_from_tokens, at cp/parser.c:701
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: haoxintu at gmail dot com
Target Milestone: ---
This code, bug.cc, reduced by C-Reduce, makes GCC ICE.
$cat bug.cc
class {
struct a < struct { b ( {
$g++ bug.cc
bug.cc:2:8: error: ‘a’ is not a class template
2 | struct a < struct { b ( {
| ^
bug.cc:2:19: error: types may not be defined in template arguments
2 | struct a < struct { b ( {
| ^
bug.cc:2:25: error: expected identifier before ‘{’ token
2 | struct a < struct { b ( {
| ^
bug.cc:2:24: error: expected ‘)’ before ‘{’ token
2 | struct a < struct { b ( {
| ~^~
| )
bug.cc:2:21: error: ISO C++ forbids declaration of ‘b’ with no type
[]8;;https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-fpermissive-fpermissive]8;;]
2 | struct a < struct { b ( {
| ^
bug.cc:3: error: expected ‘}’ at end of input
bug.cc:2:19: note: to match this ‘{’
2 | struct a < struct { b ( {
| ^
bug.cc:3: error: expected template-argument at end of input
bug.cc:3: error: expected ‘>’ at end of input
bug.cc:3: error: expected ‘{’ or ‘:’ at end of input
bug.cc:3: error: expected ‘{’ at end of input
bug.cc:3: error: expected unqualified-id at end of input
bug.cc:3: error: expected ‘}’ at end of input
bug.cc:1:7: note: to match this ‘{’
1 | class {
| ^
bug.cc:3: internal compiler error: in cp_lexer_new_from_tokens, at
cp/parser.c:701
0x641d4d cp_parser_push_lexer_for_tokens
../../gcc/cp/parser.c:701
0x9c2bc5 cp_parser_late_parsing_for_member
../../gcc/cp/parser.c:29944
0x9a0ccb cp_parser_class_specifier_1
../../gcc/cp/parser.c:24230
0x9a1aa3 cp_parser_class_specifier
../../gcc/cp/parser.c:24254
0x9a1aa3 cp_parser_type_specifier
../../gcc/cp/parser.c:17762
0x9a2a02 cp_parser_decl_specifier_seq
../../gcc/cp/parser.c:14410
0x9a35c1 cp_parser_simple_declaration
../../gcc/cp/parser.c:13664
0x9cc926 cp_parser_declaration
../../gcc/cp/parser.c:13484
0x9cd06a cp_parser_translation_unit
../../gcc/cp/parser.c:4761
0x9cd06a c_parse_file()
../../gcc/cp/parser.c:44043
0xae4dbb c_common_parse_file()
../../gcc/c-family/c-opts.c:1190
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$g++ --version
g++ (GCC) 11.0.0 20200626 (experimental)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/95927] ICE in cp_lexer_new_from_tokens, at cp/parser.c:701
2020-06-27 2:21 [Bug c++/95927] New: ICE in cp_lexer_new_from_tokens, at cp/parser.c:701 haoxintu at gmail dot com
@ 2020-07-03 4:17 ` haoxintu at gmail dot com
2020-07-08 21:50 ` mpolacek at gcc dot gnu.org
2021-12-29 0:24 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: haoxintu at gmail dot com @ 2020-07-03 4:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95927
--- Comment #1 from Haoxin Tu <haoxintu at gmail dot com> ---
Add a more meaningful case.
$cat p.cc
template <class> struct a {};
class A {
struct a < struct x { void b ( ){}} >;
};
$g++ p.cc
p.cc:3:25: error: types may not be defined in template arguments
3 | struct a < struct x { void b ( ){}} >;
| ^
p.cc:3:40: error: expected ‘;’ after struct definition
3 | struct a < struct x { void b ( ){}} >;
| ^
| ;
p.cc:3:39: error: expected template-argument before ‘;’ token
3 | struct a < struct x { void b ( ){}} >;
| ^
p.cc:3:39: error: expected ‘>’ before ‘;’ token
p.cc:3:5: error: ‘struct a<A::x>’ redeclared with different access
3 | struct a < struct x { void b ( ){}} >;
| ^~~~~~
p.cc:3:41: error: expected unqualified-id before ‘>’ token
3 | struct a < struct x { void b ( ){}} >;
| ^
p.cc:4:1: internal compiler error: in cp_lexer_new_from_tokens, at
cp/parser.c:701
4 | };
| ^
0x6adadc cp_parser_push_lexer_for_tokens
../../gcc/cp/parser.c:701
...
While in Clang
$clang++ p.cc
p.cc:3:23: error: 'x' cannot be defined in a type specifier
struct a < struct x { void b ( ){}} >;
^
1 error generated.
I guess Clang is performed better when parsing this case. GCC emits a lot of
error messages even throw an ICE, while Clang just emits one.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/95927] ICE in cp_lexer_new_from_tokens, at cp/parser.c:701
2020-06-27 2:21 [Bug c++/95927] New: ICE in cp_lexer_new_from_tokens, at cp/parser.c:701 haoxintu at gmail dot com
2020-07-03 4:17 ` [Bug c++/95927] " haoxintu at gmail dot com
@ 2020-07-08 21:50 ` mpolacek at gcc dot gnu.org
2021-12-29 0:24 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-07-08 21:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95927
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
Last reconfirmed| |2020-07-08
Status|UNCONFIRMED |NEW
Priority|P3 |P5
Ever confirmed|0 |1
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/95927] ICE in cp_lexer_new_from_tokens, at cp/parser.c:701
2020-06-27 2:21 [Bug c++/95927] New: ICE in cp_lexer_new_from_tokens, at cp/parser.c:701 haoxintu at gmail dot com
2020-07-03 4:17 ` [Bug c++/95927] " haoxintu at gmail dot com
2020-07-08 21:50 ` mpolacek at gcc dot gnu.org
@ 2021-12-29 0:24 ` pinskia at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-12-29 0:24 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95927
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 39751.
*** This bug has been marked as a duplicate of bug 39751 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-12-29 0:24 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-06-27 2:21 [Bug c++/95927] New: ICE in cp_lexer_new_from_tokens, at cp/parser.c:701 haoxintu at gmail dot com
2020-07-03 4:17 ` [Bug c++/95927] " haoxintu at gmail dot com
2020-07-08 21:50 ` mpolacek at gcc dot gnu.org
2021-12-29 0:24 ` pinskia at gcc dot gnu.org
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