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* [Bug c++/110328] New: Module related optimization is too aggressive
@ 2023-06-20 18:26 m-matti-a.lehtonen at iki dot fi
2024-03-06 16:41 ` [Bug c++/110328] " ppalka at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: m-matti-a.lehtonen at iki dot fi @ 2023-06-20 18:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110328
Bug ID: 110328
Summary: Module related optimization is too aggressive
Product: gcc
Version: 12.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: m-matti-a.lehtonen at iki dot fi
Target Milestone: ---
Created attachment 55375
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55375&action=edit
Example sources
When the module example (files test.cc and test2.cc) is compiles as
> g++-12 --std=c++20 -Wall -Wextra -Werror -pedantic -fmodules-ts -O1 -DNDEBUG test2.cc test.cc
it generates the following error:
> In file included from test.cc:4,
> of module test, imported at test2.cc:5:
> In destructor ‘virtual std::bad_optional_access::~bad_optional_access()’,
> inlined from ‘virtual std::bad_optional_access::~bad_optional_access()’ at > test2.cc:8:15:
> /usr/include/c++/12/optional:102:13: error: ‘this’ is used uninitialized [-Werror=uninitialized]
> 102 | virtual ~bad_optional_access() = default;
> | ^
> In file included from test2.cc:2:
> /usr/include/c++/12/optional: In destructor ‘virtual std::bad_optional_access::~bad_optional_access()’:
> /usr/include/c++/12/optional:102:13: note: ‘this’ was declared here
> 102 | virtual ~bad_optional_access() = default;
> | ^
If the if statement at test2.cc is uncommented, no error is generated.
If basically the same code (file test3.cc) is compiled without using modules,
no problem
> g++-12 --std=c++20 -Wall -Wextra -Werror -pedantic -O1 -DNDEBUG test3.cc
Exact version and system (Ubuntu 22.04.2 LTS)
> $ g++-12 --version
> g++-12 (Ubuntu 12.3.0-1ubuntu1~22.04) 12.3.0
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c++/110328] Module related optimization is too aggressive
2023-06-20 18:26 [Bug c++/110328] New: Module related optimization is too aggressive m-matti-a.lehtonen at iki dot fi
@ 2024-03-06 16:41 ` ppalka at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: ppalka at gcc dot gnu.org @ 2024-03-06 16:41 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110328
Patrick Palka <ppalka at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |13.0
CC| |ppalka at gcc dot gnu.org
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
--- Comment #1 from Patrick Palka <ppalka at gcc dot gnu.org> ---
I can't reproduce this with GCC 13 or trunk, so let's call this fixed since GCC
13.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-06-20 18:26 [Bug c++/110328] New: Module related optimization is too aggressive m-matti-a.lehtonen at iki dot fi
2024-03-06 16:41 ` [Bug c++/110328] " ppalka at gcc dot gnu.org
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