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Date:      Thu, 21 Nov 2024 18:17:31 +0100
From:      Guido Falsi <mad@madpilot.net>
To:        Dimitry Andric <dim@FreeBSD.org>
Cc:        ports@freebsd.org, FreeBSD Current <freebsd-current@freebsd.org>
Subject:   Re: port binary dumping core on recent head in poudriere
Message-ID:  <f9e32784-226a-4e1e-a24b-62f5e6d3d765@madpilot.net>
In-Reply-To: <5ee47c3d-f80e-4d50-9b6a-acb3c98e80e0@madpilot.net>
References:  <aa597431-54a8-4cde-8d4f-b75040b59bae@madpilot.net> <46E3A370-A3E0-4BAF-B707-87F94F98E248@FreeBSD.org> <5ee47c3d-f80e-4d50-9b6a-acb3c98e80e0@madpilot.net>

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On 20/11/24 23:50, Guido Falsi wrote:
> On 20/11/24 22:14, Dimitry Andric wrote:
>> On 20 Nov 2024, at 18:32, Guido Falsi <mad@madpilot.net> wrote:
>>> I've noticed that recently some ports are dumping core during builds 
>>> of dependencies in head in poudriere.
>>>
>>> I'm seeing this for example with sassc crashing while trying to build 
>>> x11-themes/greybird-theme.
>>>
>>> My first suspect was the llvm upgrade in head, but forcing sassc and 
>>> libsass to build with older clang via USES=llvm:max=18 is not helping.
>>>
>>> I did recompile the offending programs with debug and tried a 
>>> backtrace and got this:
>>>
>>> ```
>>> (lldb) bt
>>> * thread #1, name = 'sassc', stop reason = signal SIGSEGV: invalid 
>>> permissions for mapped object (fault address: 0x82374a000)
>>>   * frame #0: 0x000000082374a000 libsass.so.1
>>>     frame #1: 0x0000000823865a86 libsass.so.1`_GLOBAL__sub_I_ast.cpp 
>>> [inlined] double std::__1::__math::acos[abi:se190102]<int, 0>(__x=-1) 
>>> at inverse_trigonometric_functions.h:40:10
>>>     frame #2: 0x0000000823865a81 libsass.so.1`_GLOBAL__sub_I_ast.cpp 
>>> [inlined] __cxx_global_var_init at units.hpp:11:21
>>>     frame #3: 0x0000000823865a81 libsass.so.1`_GLOBAL__sub_I_ast.cpp 
>>> at ast.cpp:0
>>>     frame #4: 0x00001eac6e3f078d ld-elf.so.1
>>>     frame #5: 0x00001eac6e3ef349 ld-elf.so.1
>>>     frame #6: 0x00001eac6e3ec099 ld-elf.so.1`___lldb_unnamed_symbol27 
>>> + 25
>>> ```
>>>
>>> which points me to this upstream line of code: https://github.com/ 
>>> sass/libsass/blob/7037f03fabeb2b18b5efa84403f5a6d7a990f460/src/ 
>>> units.hpp#L11
>>>
>>> I could change the way it derives PI, but I'm not sure this is the 
>>> correct fix.
>>
>> At first sight this looks like some sort of initialization order 
>> fiasco, but without a full backtrace and some indications on what it 
>> is exactly segfaulting on it is hard to say. Is it reproducible?
> 
> It is fully reproducible here by just compiling the sassc port and 
> trying to run it. It segfaults on startup.

I'm following up to myself to note that I'm observing the same issue in 
textproc/opensp if trying to run anything linked with the library, for 
example its own binary "osx".

I noticed it because it is required by libosp and then by gnucash which 
I use and maintain. libosp fails during configure due to a test binary 
compiled by configure script dumping core.

I suspect there are more around the ports tree.

-- 
Guido Falsi <mad@madpilot.net>



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