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* [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c
@ 2020-06-24 15:30 viktor.rosendahl at bmw dot de
2020-06-24 16:46 ` [Bug c++/95870] " mpolacek at gcc dot gnu.org
` (17 more replies)
0 siblings, 18 replies; 19+ messages in thread
From: viktor.rosendahl at bmw dot de @ 2020-06-24 15:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Bug ID: 95870
Summary: ICE(segmentation fault) in most_general_template(), in
gcc/cp/pt.c
Product: gcc
Version: 9.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: viktor.rosendahl at bmw dot de
Target Milestone: ---
Created attachment 48780
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48780&action=edit
Selfcontained example (preprocessed cource code)
I can reproduce this bug with the following gcc versions:
9.3.0
10.1.0
11.0.0 20200624 (experimental) [this was built with revision eb0ff770e29 from
git://gcc.gnu.org/git/gcc.git, which was the tip of the master branch on 24th
of June, 2020]
The bug does not happen with:
7.5.0
I have not tested any 8.x version.
All compilers were built from pristine sources, no patches added.
My system is a x86_64 machine with Ubuntu 18.04.4 LTS.
I configured all compiler builds like this:
./configure --disable-multilib --prefix=/home/viktor/gcc-bin-9.3.0
--enable-languages=c,c++
Steps to reproduce:
xz -dc preproc_example4.ii.xz > preproc_example4.ii
g++ -c -pipe -O2 -Wall -std=c++17 -Wall -W -D_REENTRANT -fPIC -DQT_NO_DEBUG
-DQT_GUI_LIB -DQT_CORE_LIB -o obj/example4.o preproc_example4.ii
I get the following output (with gcc-9.3.0):
example4.cpp: In instantiation of ‘BungleFooBar<U, V>::BungleFooBar() [with U =
FailFoo; V = BotchFoo]’:
example4.cpp:44:22: required from here
example4.cpp:17:5: internal compiler error: Segmentation fault
17 | MACRO_FOOBAR(foofoobar, bar);
| ^
0xb8ff1f crash_signal
../.././gcc/toplev.c:326
0x6e4260 most_general_template(tree_node*)
../.././gcc/cp/pt.c:23652
0x6e457d enclosing_instantiation_of
../.././gcc/cp/pt.c:13424
0x701c53 tsubst_function_decl
../.././gcc/cp/pt.c:12943
0x6fe2b8 tsubst_decl
../.././gcc/cp/pt.c:13464
0x6f9ee7 tsubst(tree_node*, tree_node*, int, tree_node*)
../.././gcc/cp/pt.c:14365
0x70263a lookup_template_class_1
../.././gcc/cp/pt.c:9483
0x70263a lookup_template_class(tree_node*, tree_node*, tree_node*, tree_node*,
int, int)
../.././gcc/cp/pt.c:9771
0x700e5d tsubst_aggr_type
../.././gcc/cp/pt.c:12764
0x6f9cbf tsubst(tree_node*, tree_node*, int, tree_node*)
../.././gcc/cp/pt.c:14447
0x6fe940 tsubst_decl
../.././gcc/cp/pt.c:13731
0x6f9ee7 tsubst(tree_node*, tree_node*, int, tree_node*)
../.././gcc/cp/pt.c:14365
0x6f42ce tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../.././gcc/cp/pt.c:17173
0x6f2378 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../.././gcc/cp/pt.c:17088
0x6f24ec tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../.././gcc/cp/pt.c:17389
0x6f24ec tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../.././gcc/cp/pt.c:17389
0x6f5885 tsubst_expr(tree_node*, tree_node*, int, tree_node*, bool)
../.././gcc/cp/pt.c:17073
0x6f5885 tsubst_lambda_expr(tree_node*, tree_node*, int, tree_node*)
../.././gcc/cp/pt.c:18301
0x6f7775 tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../.././gcc/cp/pt.c:19666
0x6f618e tsubst_copy_and_build(tree_node*, tree_node*, int, tree_node*, bool,
bool)
../.././gcc/cp/pt.c:18918
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.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
@ 2020-06-24 16:46 ` mpolacek at gcc dot gnu.org
2020-06-24 16:46 ` mpolacek at gcc dot gnu.org
` (16 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-06-24 16:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed, don't see any existing PRs for this.
Going to bisect + reduce.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
2020-06-24 16:46 ` [Bug c++/95870] " mpolacek at gcc dot gnu.org
@ 2020-06-24 16:46 ` mpolacek at gcc dot gnu.org
2020-06-24 17:22 ` mpolacek at gcc dot gnu.org
` (15 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-06-24 16:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2020-06-24
Ever confirmed|0 |1
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
2020-06-24 16:46 ` [Bug c++/95870] " mpolacek at gcc dot gnu.org
2020-06-24 16:46 ` mpolacek at gcc dot gnu.org
@ 2020-06-24 17:22 ` mpolacek at gcc dot gnu.org
2020-06-24 17:23 ` mpolacek at gcc dot gnu.org
` (14 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-06-24 17:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Looks like it started with r251433.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (2 preceding siblings ...)
2020-06-24 17:22 ` mpolacek at gcc dot gnu.org
@ 2020-06-24 17:23 ` mpolacek at gcc dot gnu.org
2020-06-24 18:05 ` [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation " mpolacek at gcc dot gnu.org
` (13 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-06-24 17:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Reduced, but invalid:
template <typename> class a {
public:
a();
int b = [] { enum E {}; };
};
class c : a<int> {
c();
};
template <typename d> a<d>::a() = default;
c::c() {}
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (3 preceding siblings ...)
2020-06-24 17:23 ` mpolacek at gcc dot gnu.org
@ 2020-06-24 18:05 ` mpolacek at gcc dot gnu.org
2020-10-12 12:52 ` rguenth at gcc dot gnu.org
` (12 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2020-06-24 18:05 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |8.5
Keywords| |ice-on-valid-code
Summary|ICE(segmentation fault) in |[8/9/10/11 Regression] ICE
|most_general_template(), in |(segmentation fault) in
|gcc/cp/pt.c |most_general_template(), in
| |gcc/cp/pt.c
--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Valid code that ICEs:
template <typename> struct S {
S();
int b = []() -> int { enum E {}; return 1; }();
};
struct C : S<int> {
C();
};
template <typename T> S<T>::S() = default;
C::C() {}
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (4 preceding siblings ...)
2020-06-24 18:05 ` [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation " mpolacek at gcc dot gnu.org
@ 2020-10-12 12:52 ` rguenth at gcc dot gnu.org
2021-03-12 0:37 ` mpolacek at gcc dot gnu.org
` (11 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: rguenth at gcc dot gnu.org @ 2020-10-12 12:52 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (5 preceding siblings ...)
2020-10-12 12:52 ` rguenth at gcc dot gnu.org
@ 2021-03-12 0:37 ` mpolacek at gcc dot gnu.org
2021-03-12 0:37 ` mpolacek at gcc dot gnu.org
` (10 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2021-03-12 0:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |public at enkore dot de
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 97372 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (6 preceding siblings ...)
2021-03-12 0:37 ` mpolacek at gcc dot gnu.org
@ 2021-03-12 0:37 ` mpolacek at gcc dot gnu.org
2021-04-05 13:53 ` jason at gcc dot gnu.org
` (9 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2021-03-12 0:37 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Valid test from bug 97372:
class Lockable {
public:
Lockable(int *);
};
template <typename> class ThreadTask2 {
Lockable _state_mutex{[]() -> int * { static int srcloc; return 0; }()};
public:
ThreadTask2() {}
};
void x() { ThreadTask2<int> foo; }
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (7 preceding siblings ...)
2021-03-12 0:37 ` mpolacek at gcc dot gnu.org
@ 2021-04-05 13:53 ` jason at gcc dot gnu.org
2021-04-05 13:53 ` viktor.rosendahl at bmw dot de
` (8 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: jason at gcc dot gnu.org @ 2021-04-05 13:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
Assignee|unassigned at gcc dot gnu.org |jason at gcc dot gnu.org
Status|NEW |ASSIGNED
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (8 preceding siblings ...)
2021-04-05 13:53 ` jason at gcc dot gnu.org
@ 2021-04-05 13:53 ` viktor.rosendahl at bmw dot de
2021-04-05 19:39 ` cvs-commit at gcc dot gnu.org
` (7 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: viktor.rosendahl at bmw dot de @ 2021-04-05 13:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
--- Comment #7 from Viktor Rosendahl <viktor.rosendahl at bmw dot de> ---
Thanks for your message. I am on vacation. I will be working again on 6th of
April 2021.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (9 preceding siblings ...)
2021-04-05 13:53 ` viktor.rosendahl at bmw dot de
@ 2021-04-05 19:39 ` cvs-commit at gcc dot gnu.org
2021-04-05 21:30 ` [Bug c++/95870] [8/9/10 " jason at gcc dot gnu.org
` (6 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-04-05 19:39 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:
https://gcc.gnu.org/g:62d60246e53778db6ee613377dd013ba4b264968
commit r11-7992-g62d60246e53778db6ee613377dd013ba4b264968
Author: Jason Merrill <jason@redhat.com>
Date: Mon Apr 5 11:34:48 2021 -0400
c++: lambda in DMI in class template [PR95870]
Here enclosing_instantiation_of was failing to find a match because otctx
is
struct S<T> and current_function_decl is S<int>::S(), so the latter has
more
function contexts, and we end up trying to compare S() to NULL_TREE.
After spending a bit of time working on establishing the correspondence in
this case (class <=> constructor), it occurred to me that we could just use
DECL_SOURCE_LOCATION, which is unique for lambdas, since they cannot be
redeclared. Since we're so close to release, for now I'm only doing this
for the case that was failing before.
gcc/cp/ChangeLog:
PR c++/95870
* pt.c (enclosing_instantiation_of): Compare DECL_SOURCE_LOCATION
if
there is no enclosing non-lambda function.
gcc/testsuite/ChangeLog:
PR c++/95870
* g++.dg/cpp0x/lambda/lambda-nsdmi10.C: New test.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [8/9/10 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (10 preceding siblings ...)
2021-04-05 19:39 ` cvs-commit at gcc dot gnu.org
@ 2021-04-05 21:30 ` jason at gcc dot gnu.org
2021-05-14 9:53 ` [Bug c++/95870] [9/10 " jakub at gcc dot gnu.org
` (5 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: jason at gcc dot gnu.org @ 2021-04-05 21:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |11.0
Summary|[8/9/10/11 Regression] ICE |[8/9/10 Regression] ICE
|(segmentation fault) in |(segmentation fault) in
|most_general_template(), in |most_general_template(), in
|gcc/cp/pt.c |gcc/cp/pt.c
--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 11 so far.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [9/10 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (11 preceding siblings ...)
2021-04-05 21:30 ` [Bug c++/95870] [8/9/10 " jason at gcc dot gnu.org
@ 2021-05-14 9:53 ` jakub at gcc dot gnu.org
2021-05-14 16:11 ` cvs-commit at gcc dot gnu.org
` (4 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: jakub at gcc dot gnu.org @ 2021-05-14 9:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|8.5 |9.4
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 8 branch is being closed.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [9/10 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (12 preceding siblings ...)
2021-05-14 9:53 ` [Bug c++/95870] [9/10 " jakub at gcc dot gnu.org
@ 2021-05-14 16:11 ` cvs-commit at gcc dot gnu.org
2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org
` (3 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-14 16:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jason Merrill <jason@gcc.gnu.org>:
https://gcc.gnu.org/g:2f1bb00ba340e53663651be7874011fd54e1d085
commit r12-804-g2f1bb00ba340e53663651be7874011fd54e1d085
Author: Jason Merrill <jason@redhat.com>
Date: Mon Apr 5 11:47:50 2021 -0400
c++: simplify enclosing_instantiation_of [PR95870]
Comparing DECL_SOURCE_LOCATION like the GCC 11 patch for PR 95870 will also
work for user-defined functions, if we update their location when
instantiating. Another option would be to use LAMBDA_EXPR_REGEN_INFO for
lambdas, but this way is even simpler.
gcc/cp/ChangeLog:
PR c++/95870
* pt.c (enclosing_instantiation_of): Just compare
DECL_SOURCE_LOCATION.
(regenerate_decl_from_template): Copy DECL_SOURCE_LOCATION.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [9/10 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (13 preceding siblings ...)
2021-05-14 16:11 ` cvs-commit at gcc dot gnu.org
@ 2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org
2021-06-01 8:17 ` rguenth at gcc dot gnu.org
` (2 subsequent siblings)
17 siblings, 0 replies; 19+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2021-05-20 21:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:
https://gcc.gnu.org/g:ff24ef677edee888012aaddeb0ec9bbe366b4f57
commit r10-9845-gff24ef677edee888012aaddeb0ec9bbe366b4f57
Author: Jason Merrill <jason@redhat.com>
Date: Mon Apr 5 11:34:48 2021 -0400
c++: lambda in DMI in class template [PR95870]
Here enclosing_instantiation_of was failing to find a match because otctx
is
struct S<T> and current_function_decl is S<int>::S(), so the latter has
more
function contexts, and we end up trying to compare S() to NULL_TREE.
After spending a bit of time working on establishing the correspondence in
this case (class <=> constructor), it occurred to me that we could just use
DECL_SOURCE_LOCATION, which is unique for lambdas, since they cannot be
redeclared. Since we're so close to release, for now I'm only doing this
for the case that was failing before.
gcc/cp/ChangeLog:
PR c++/95870
* pt.c (enclosing_instantiation_of): Compare DECL_SOURCE_LOCATION
if
there is no enclosing non-lambda function.
gcc/testsuite/ChangeLog:
PR c++/95870
* g++.dg/cpp0x/lambda/lambda-nsdmi10.C: New test.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [9/10 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (14 preceding siblings ...)
2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org
@ 2021-06-01 8:17 ` rguenth at gcc dot gnu.org
2022-05-13 17:41 ` [Bug c++/95870] [9 " cvs-commit at gcc dot gnu.org
2022-05-13 17:46 ` jason at gcc dot gnu.org
17 siblings, 0 replies; 19+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-06-01 8:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|9.4 |9.5
--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9.4 is being released, retargeting bugs to GCC 9.5.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [9 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (15 preceding siblings ...)
2021-06-01 8:17 ` rguenth at gcc dot gnu.org
@ 2022-05-13 17:41 ` cvs-commit at gcc dot gnu.org
2022-05-13 17:46 ` jason at gcc dot gnu.org
17 siblings, 0 replies; 19+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2022-05-13 17:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:
https://gcc.gnu.org/g:cf475f6e23581b1766e508dba81171de8f81b180
commit r9-10166-gcf475f6e23581b1766e508dba81171de8f81b180
Author: Jason Merrill <jason@redhat.com>
Date: Mon Apr 5 11:34:48 2021 -0400
c++: lambda in DMI in class template [PR95870]
Here enclosing_instantiation_of was failing to find a match because otctx
is
struct S<T> and current_function_decl is S<int>::S(), so the latter has
more
function contexts, and we end up trying to compare S() to NULL_TREE.
After spending a bit of time working on establishing the correspondence in
this case (class <=> constructor), it occurred to me that we could just use
DECL_SOURCE_LOCATION, which is unique for lambdas, since they cannot be
redeclared. Since we're so close to release, for now I'm only doing this
for the case that was failing before.
gcc/cp/ChangeLog:
PR c++/95870
* pt.c (enclosing_instantiation_of): Compare DECL_SOURCE_LOCATION
if
there is no enclosing non-lambda function.
gcc/testsuite/ChangeLog:
PR c++/95870
* g++.dg/cpp0x/lambda/lambda-nsdmi10.C: New test.
^ permalink raw reply [flat|nested] 19+ messages in thread
* [Bug c++/95870] [9 Regression] ICE (segmentation fault) in most_general_template(), in gcc/cp/pt.c
2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
` (16 preceding siblings ...)
2022-05-13 17:41 ` [Bug c++/95870] [9 " cvs-commit at gcc dot gnu.org
@ 2022-05-13 17:46 ` jason at gcc dot gnu.org
17 siblings, 0 replies; 19+ messages in thread
From: jason at gcc dot gnu.org @ 2022-05-13 17:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95870
Jason Merrill <jason at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #15 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 9.5/10.4/11.
^ permalink raw reply [flat|nested] 19+ messages in thread
end of thread, other threads:[~2022-05-13 17:46 UTC | newest]
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2020-06-24 15:30 [Bug c++/95870] New: ICE(segmentation fault) in most_general_template(), in gcc/cp/pt.c viktor.rosendahl at bmw dot de
2020-06-24 16:46 ` [Bug c++/95870] " mpolacek at gcc dot gnu.org
2020-06-24 16:46 ` mpolacek at gcc dot gnu.org
2020-06-24 17:22 ` mpolacek at gcc dot gnu.org
2020-06-24 17:23 ` mpolacek at gcc dot gnu.org
2020-06-24 18:05 ` [Bug c++/95870] [8/9/10/11 Regression] ICE (segmentation " mpolacek at gcc dot gnu.org
2020-10-12 12:52 ` rguenth at gcc dot gnu.org
2021-03-12 0:37 ` mpolacek at gcc dot gnu.org
2021-03-12 0:37 ` mpolacek at gcc dot gnu.org
2021-04-05 13:53 ` jason at gcc dot gnu.org
2021-04-05 13:53 ` viktor.rosendahl at bmw dot de
2021-04-05 19:39 ` cvs-commit at gcc dot gnu.org
2021-04-05 21:30 ` [Bug c++/95870] [8/9/10 " jason at gcc dot gnu.org
2021-05-14 9:53 ` [Bug c++/95870] [9/10 " jakub at gcc dot gnu.org
2021-05-14 16:11 ` cvs-commit at gcc dot gnu.org
2021-05-20 21:35 ` cvs-commit at gcc dot gnu.org
2021-06-01 8:17 ` rguenth at gcc dot gnu.org
2022-05-13 17:41 ` [Bug c++/95870] [9 " cvs-commit at gcc dot gnu.org
2022-05-13 17:46 ` jason at gcc dot gnu.org
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