https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109480
Bug ID: 109480
Summary: g++-12 and g++-11 failed to compile the attached
source file while g++-10 and clang can.
Product: gcc
Version: 11.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ishikawa at yk dot rim.or.jp
Target Milestone: ---
Created attachment 54837
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54837&action=edit
target.cpp: this shows the compiler issue for g++-10 and g++-11
I am reporting a reduced case of a compilation issue noticed when we compile
mozilla firefox browser, and thunderbird mail client software.
For the original problem report and the workaround (basically rewriting the
source code), see the bugzilla entry at mozilla's bugzilla,
https://bugzilla.mozilla.org/show_bug.cgi?id=1825516
Now, I am a newbie to c-vise source coded reduction tool, but managed to create
the attached reduced source file.
That file shows the symptom.
I am using the following compiler for testing.
Version Info:
g++-10 --version
g++-10 (Debian 10.4.0-7) 10.4.0
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.
ishikawa@ip030:~/Dropbox/TB-DIR/WALL-PATCH-DIR$ g++-11 --version
g++-11 (Debian 11.3.0-12) 11.3.0
Copyright (C) 2021 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.
ishikawa@ip030:~/Dropbox/TB-DIR/WALL-PATCH-DIR$ g++-12 --version
g++-12 (Debian 12.2.0-14) 12.2.0
Copyright (C) 2022 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.
ishikawa@ip030:~/Dropbox/TB-DIR/WALL-PATCH-DIR$ clang --version
clang version 15.0.5 (taskcluster-ETTsfeYjQ76jbYk0xzOrPA)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/ishikawa/.mozbuild/clang/bin
The clang compiler I use is a version compiled by mozilla to facilitate that
the developer community uses the same clang everywhere.
g++-10 can compile it.
g++-11 can not.
g++-12 can not.
clang can.
See the console log below.
ishikawa@ip030:~/Dropbox/TB-DIR/WALL-PATCH-DIR$ g++-10 -c target.cpp
ishikawa@ip030:~/Dropbox/TB-DIR/WALL-PATCH-DIR$ g++-11 -c target.cpp
target.cpp: In member function ‘void
mozilla::a11y::RemoteAccessibleBase<Derived>::BoundsWithOffset() const’:
target.cpp:14:57: error: ‘bool
mozilla::a11y::RemoteAccessibleBase<Derived>::ApplyScrollOffset(nsRect&) const
[with Derived = mozilla::a11y::RemoteAccessible]’ is protected within this
context
14 | const bool hasScrollArea = remoteAcc.ApplyScrollOffset(bounds);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
target.cpp:6:14: note: declared protected here
6 | bool ApplyScrollOffset(nsRect & a) const { return a.x > 0 ?
true: false; } ;
| ^~~~~~~~~~~~~~~~~
ishikawa@ip030:~/Dropbox/TB-DIR/WALL-PATCH-DIR$ g++-12 -c target.cpp
target.cpp: In member function ‘void
mozilla::a11y::RemoteAccessibleBase<Derived>::BoundsWithOffset() const’:
target.cpp:14:57: error: ‘bool
mozilla::a11y::RemoteAccessibleBase<Derived>::ApplyScrollOffset(nsRect&) const
[with Derived = mozilla::a11y::RemoteAccessible]’ is protected within this
context
14 | const bool hasScrollArea = remoteAcc.ApplyScrollOffset(bounds);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
target.cpp:6:14: note: declared protected here
6 | bool ApplyScrollOffset(nsRect & a) const { return a.x > 0 ?
true: false; } ;
| ^~~~~~~~~~~~~~~~~
ishikawa@ip030:~/Dropbox/TB-DIR/WALL-PATCH-DIR$ clang -c target.cpp
ishikawa@ip030:~/Dropbox/TB-DIR/WALL-PATCH-DIR$
Thank you for sharing the great compiler suite with the developer community.
