conda-forge builds of fmt 11.1.0 through 11.1.3 have all failed due to an ABI break on Windows that was uncovered during downstream tests of libmamba. @saraedum identified this as the breaking symbol:
-??$vformat_to@D@detail@v11@fmt@@YAXAEAV?$buffer@D@012@V?$basic_string_view@D@12@V?$basic_format_args@Vcontext@v11@fmt@@@12@Vlocale_ref@012@@Z +??$vformat_to@D@detail@v11@fmt@@YAXAEAV?$buffer@D@012@V?$basic_string_view@D@12@V?$basic_format_args@Vcontext@v11@fmt@@@12@Ulocale_ref@012@@Z
A few users have requested a newer fmt release, which probably requires a fix for this (if this is indeed the root cause -- I have not verified if there are any other ABI breaks). The failure logs can be seen here: conda-forge/fmt-feedstock#55
The error looks like:
import: 'libmambapy'
Traceback (most recent call last):
File "D:\bld\fmt_1737954208540\test_tmp\run_test.py", line 2, in <module>
import libmambapy
File "D:\bld\fmt_1737954208540\_test_env\Lib\site-packages\libmambapy\__init__.py", line 7, in <module>
raise e
File "D:\bld\fmt_1737954208540\_test_env\Lib\site-packages\libmambapy\__init__.py", line 4, in <module>
from libmambapy.bindings import * # noqa: F401,F403
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ImportError: DLL load failed while importing bindings: The specified procedure could not be found.
I attempted to demangle the symbols above, and got:
- void __cdecl fmt::v11::detail::vformat_to<char>(class fmt::v11::detail::buffer<char> &, class fmt::v11::basic_string_view<char>, class fmt::v11::basic_format_args<class fmt::v11::context>, class fmt::v11::detail::locale_ref) + void __cdecl fmt::v11::detail::vformat_to<char>(class fmt::v11::detail::buffer<char> &, class fmt::v11::basic_string_view<char>, class fmt::v11::basic_format_args<class fmt::v11::context>, struct fmt::v11::detail::locale_ref)
That points to this commit as the source of the change: f213d83
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