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* [Bug c++/96008] New: cpp1y/lambda-generic-69078-1.C nonnull warning and ICE
@ 2020-06-30 16:56 dje at gcc dot gnu.org
2020-06-30 16:56 ` [Bug c++/96008] " dje at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: dje at gcc dot gnu.org @ 2020-06-30 16:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96008
Bug ID: 96008
Summary: cpp1y/lambda-generic-69078-1.C nonnull warning and ICE
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dje at gcc dot gnu.org
Target Milestone: ---
With the recent -Wnonnull changes, cpp1y/lambda-generic-69078-1.C now elicits a
warning and the compiler ICEs.
FAIL: g++.dg/cpp1y/lambda-generic-69078-1.C -std=gnu++14 (test for excess
errors)
Excess errors:
/nasfarm/edelsohn/src/src/gcc/testsuite/g++.dg/cpp1y/lambda-generic-69078-1.C:23:13:
warning: 'this' pointer null [-Wnonnull]
'
Internal compiler error: Error reporting routines re-entered.
ranges offset out of range
In discussion on IRC, Jonathan Wakely suggested that this is a C++FE bug
because a lambda expression can't have a null this pointer.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/96008] cpp1y/lambda-generic-69078-1.C nonnull warning and ICE
2020-06-30 16:56 [Bug c++/96008] New: cpp1y/lambda-generic-69078-1.C nonnull warning and ICE dje at gcc dot gnu.org
@ 2020-06-30 16:56 ` dje at gcc dot gnu.org
2020-06-30 17:57 ` msebor at gcc dot gnu.org
2020-06-30 17:59 ` dje at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: dje at gcc dot gnu.org @ 2020-06-30 16:56 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96008
David Edelsohn <dje at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2020-06-30
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from David Edelsohn <dje at gcc dot gnu.org> ---
Confirmed.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/96008] cpp1y/lambda-generic-69078-1.C nonnull warning and ICE
2020-06-30 16:56 [Bug c++/96008] New: cpp1y/lambda-generic-69078-1.C nonnull warning and ICE dje at gcc dot gnu.org
2020-06-30 16:56 ` [Bug c++/96008] " dje at gcc dot gnu.org
@ 2020-06-30 17:57 ` msebor at gcc dot gnu.org
2020-06-30 17:59 ` dje at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: msebor at gcc dot gnu.org @ 2020-06-30 17:57 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96008
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |msebor at gcc dot gnu.org
Resolution|--- |DUPLICATE
Status|NEW |RESOLVED
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
This is a duplicate of 95984.
*** This bug has been marked as a duplicate of bug 95984 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/96008] cpp1y/lambda-generic-69078-1.C nonnull warning and ICE
2020-06-30 16:56 [Bug c++/96008] New: cpp1y/lambda-generic-69078-1.C nonnull warning and ICE dje at gcc dot gnu.org
2020-06-30 16:56 ` [Bug c++/96008] " dje at gcc dot gnu.org
2020-06-30 17:57 ` msebor at gcc dot gnu.org
@ 2020-06-30 17:59 ` dje at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: dje at gcc dot gnu.org @ 2020-06-30 17:59 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96008
--- Comment #3 from David Edelsohn <dje at gcc dot gnu.org> ---
msebor:
the warning is working correctly but the IL the C++ front end
emits doesn't look right: AFAICS, it creates a function object
for the lambda and calls its operator() with a null this pointer:
; Function static decltype (((const main()::<lambda(auto:1
...)>*)0)->operator()<auto:1
...>(static_cast<auto:1&&>(main::._anon_0::_FUN::<unnamed>) ...))
main()::<lambda(auto:1 ...)>::_FUN(auto:1 ...) [with auto:1 = {int};
decltype (((const main()::<lambda(auto:1 ...)>*)0)->operator()<auto:1
...>(static_cast<auto:1&&>(main::._anon_0::_FUN::<unnamed>) ...)) =
void] (null)
;; enabled by -tree-original
<<cleanup_point <<< Unknown tree: expr_stmt
main()::<lambda(auto:1 ...)>::operator()<int> (0B, D.2440) >>>>>;
return;
The ICE is PR95984
^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-06-30 16:56 [Bug c++/96008] New: cpp1y/lambda-generic-69078-1.C nonnull warning and ICE dje at gcc dot gnu.org
2020-06-30 16:56 ` [Bug c++/96008] " dje at gcc dot gnu.org
2020-06-30 17:57 ` msebor at gcc dot gnu.org
2020-06-30 17:59 ` dje at gcc dot gnu.org
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