GNU bug report logs - #47191
28.0.50; Native compilation branch freeze in cc-mode

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From: Daniel Colascione <dancol <at> dancol.org>
To: Damien <dam <at> cosinux.org>, 47191 <at> debbugs.gnu.org
Subject: bug#47191: 28.0.50; Native compilation branch freeze in cc-mode
Date: Mon, 22 Mar 2021 13:01:26 -0400

[Message part 1 (text/plain, inline)]

On 3/17/21 3:47 AM, Damien wrote:

> So I just tested again, with recompiling with `--with-nativecompilation` and I have the exact same behavior. So maybe it is not linked to the compilation branch then. I'll try to reproduce it this weekend on master and maybe bisect it.

The following program freezes in Emacs -Q on current master. To repro, 
start with emacs -Q bad-cc-mode.cpp and scroll down

> "Andrea Corallo" akrl <at> sdf.org – 16 mars 2021 16:35
>> Damien <dam <at> cosinux.org> writes:
>>
>>> Using the native compilation branch, Create tmp.cpp with this:
>>>
>>> ```
>>> // In state_machine
>>> private: auto
>>> state_machine::stop_bbbbbbb(states::recording &&s,
>>> aaaaaa::bbbbbbb_stopped_reason reason)
>>> -> fsm::state_machine<
>>> aaaaaa::bbbbbbb::state_machine,
>>> std::variant<aaaaa::bbbb::cccccc::ddddddd::eeeeee::aaaaaa_connected,
>>> aaaaa::bbbb::cccccc::ddddddd::eeeeee::aaaaaa_disconnected,
>>> aaaaa::bbbb::cccccc::ddddddd::eeeeee::aaaaaa_state,
>>> aaaaa::bbbb::cccccc::ddddddd::eeeeee::aaaaaa_info,
>>> aaaaa::bbbb::cccccc::ddddddd::eeeeee::aaaaaa_battery,
>>> aaaaa::bbbb::cccccc::ddddddd::eeeeee::account_error,
>>> aaaaa::bbbb::cccccc::ddddddd::eeeeee::account_valid>,
>>> std::variant<aaaaa::bbbb::aaaaaa::bbbbbbb::states::init>>::state
>>> ```
>>>
>>> Open using `emacs -Q tmp.cpp` and emacs freezes.
>> I've just compiled f3abb17118 but I can't reproduce this.
>>
>> I'm seeing you are compiling with '--with-nativecomp', we have changed
>> the flag into '--with-nativecompilation' (yeah sorry) so native
>> compilation is disable on your build (should be also listed in
>> "Configured features:" if enabled).
>>
>> Rebuilding f3abb17118 without enabling native compilation I still can't
>> reproduce this :(
>>
>> Thanks
>>
>> Andrea
>>
>>
>
>

[bad-cc-mode.cpp (text/x-c++src, attachment)]

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