Kaldi is used for speech recognition. But at the moment in NixOS 25.05 this fails to build the follow error (see below). But the summor is that I am encountering a build error due to a mismatch in how std::unique_ptr is being assigned in the Kaldi codebase. Specifically in fst.h when used with the newer C++ standard (GCC 14.2.1 and C++20/23).
isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
This is trying to assign a raw pointer (fst::SymbolTable*) to a std::unique_ptr<fst::SymbolTable>, which is not allowed directly. unique_ptr cannot be assigned from a raw pointer without explicitly wrapping it.
The fix, if I recall correctly (I don’t code often, so excuse me if I am wrong).
isymbols_ = impl.isymbols_ ? std::unique_ptr<fst::SymbolTable>(impl.isymbols_->Copy()) : nullptr;
osymbols_ = impl.osymbols_ ? std::unique_ptr<fst::SymbolTable>(impl.osymbols_->Copy()) : nullptr;
This ensures that std::unique_ptr takes ownership of the dynamically allocated object returned by Copy().
The full error is below. Feel free to tell me if I am missing something. My skillset is I know enough to know that I don’t know enough, while also knowing when I think about code long enough, I get a headache. lol But I do hope this is useful.
The error:
CMake Warning (dev) at CMakeLists.txt:43 (find_package):
Policy CMP0148 is not set: The FindPythonInterp and FindPythonLibs modules
are removed. Run "cmake --help-policy CMP0148" for policy details. Use
the cmake_policy command to set the policy and suppress this warning.
This warning is for project developers. Use -Wno-dev to suppress it.
-- Found PythonInterp: /nix/store/8w718rm43x7z73xhw9d6vh8s4snrq67h-python3-3.12.10/bin/python (found version "3.12.10")
-- Running gen_cmake_skeleton.py
/build/source/cmake/gen_cmake_skeleton.py:235: SyntaxWarning: invalid escape sequence '\s'
libs = re.findall("[^\s\\\\=]+", libs)
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Could not find nvcc, please set CUDAToolkit_ROOT.
CMake Warning (dev) at CMakeLists.txt:189 (find_package):
Policy CMP0146 is not set: The FindCUDA module is removed. Run "cmake
--help-policy CMP0146" for policy details. Use the cmake_policy command to
set the policy and suppress this warning.
This warning is for project developers. Use -Wno-dev to suppress it.
CUDA_TOOLKIT_ROOT_DIR not found or specified
-- Could NOT find CUDA (missing: CUDA_TOOLKIT_ROOT_DIR CUDA_NVCC_EXECUTABLE CUDA_INCLUDE_DIRS CUDA_CUDART_LIBRARY)
-- KALDI_VERSION set to "5.5"
-- Configuring done (1.5s)
copying path '/nix/store/831imiy4g9v6g3pk23hqchx1j11j0jkd-python3.12-torch-2.6.0-dev' from 'https://cache.nixos.org'...
-- Generating done (1.8s)
CMake Warning:
Manually-specified variables were not used by the project:
CMAKE_EXPORT_NO_PACKAGE_REGISTRY
CMAKE_POLICY_DEFAULT_CMP0025
-- Build files have been written to: /build/source/build
cmake: enabled parallel building
cmake: enabled parallel installing
Running phase: buildPhase
build flags: -j16 SHELL=/nix/store/xy4jjgw87sbgwylm5kn047d9gkbhsr9x-bash-5.2p37/bin/bash
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/fst-types.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/symbol-table.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/mapped-file.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/util.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/compat.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/flags.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/fst.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/properties.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/symbol-table-ops.cc.o
[ 0%] Building CXX object _deps/openfst-build/src/lib/CMakeFiles/fst.dir/weight.cc.o
copying path '/nix/store/41p71bqd8iazgd38p0h061x1nx27nvdc-python3.12-whisper-20240930-unstable-2025-01-04' from 'https://cache.nixos.org'...
In file included from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/symbol-table-ops.h:12,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/lib/symbol-table-ops.cc:5:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h: In member function 'fst::internal::FstImpl<Arc>& fst::internal::FstImpl<Arc>::operator=(const fst::internal::FstImpl<Arc>&)':
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:655:59: error: no match for 'operator=' (operand types are 'std::unique_ptr<fst::SymbolTable>' and 'fst::SymbolTable*')
655 | isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
| ^~~~~~~
In file included from /nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/memory:78,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:16:
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: candidate: 'template<class _Up, class _Ep> typename std::enable_if<std::__and_<std::__and_<std::is_convertible<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::__uniq_ptr_impl<_Tp, _Dp>::pointer>, std::__not_<std::is_array<_Up> > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp, _Dp>&>::type std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Ep = _Up; _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
425 | operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: template argument deduction/substitution failed:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:655:59: note: mismatched types 'std::unique_ptr<_Tp, _Dp>' and 'fst::SymbolTable*'
655 | isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:19: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Tp, _Dp>&&) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:29: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::unique_ptr<fst::SymbolTable>&&'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:7: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::nullptr_t) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>; std::nullptr_t = std::nullptr_t]'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:17: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::nullptr_t'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~~
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:656:59: error: no match for 'operator=' (operand types are 'std::unique_ptr<fst::SymbolTable>' and 'fst::SymbolTable*')
656 | osymbols_ = impl.osymbols_ ? impl.osymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: candidate: 'template<class _Up, class _Ep> typename std::enable_if<std::__and_<std::__and_<std::is_convertible<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::__uniq_ptr_impl<_Tp, _Dp>::pointer>, std::__not_<std::is_array<_Up> > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp, _Dp>&>::type std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Ep = _Up; _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
425 | operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: template argument deduction/substitution failed:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:656:59: note: mismatched types 'std::unique_ptr<_Tp, _Dp>' and 'fst::SymbolTable*'
656 | osymbols_ = impl.osymbols_ ? impl.osymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:19: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Tp, _Dp>&&) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:29: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::unique_ptr<fst::SymbolTable>&&'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:7: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::nullptr_t) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>; std::nullptr_t = std::nullptr_t]'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:17: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::nullptr_t'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~~
In file included from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/lib/fst.cc:6:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h: In member function 'fst::internal::FstImpl<Arc>& fst::internal::FstImpl<Arc>::operator=(const fst::internal::FstImpl<Arc>&)':
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:655:59: error: no match for 'operator=' (operand types are 'std::unique_ptr<fst::SymbolTable>' and 'fst::SymbolTable*')
655 | isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
| ^~~~~~~
In file included from /nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/memory:78,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:16:
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: candidate: 'template<class _Up, class _Ep> typename std::enable_if<std::__and_<std::__and_<std::is_convertible<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::__uniq_ptr_impl<_Tp, _Dp>::pointer>, std::__not_<std::is_array<_Up> > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp, _Dp>&>::type std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Ep = _Up; _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
425 | operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: template argument deduction/substitution failed:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:655:59: note: mismatched types 'std::unique_ptr<_Tp, _Dp>' and 'fst::SymbolTable*'
655 | isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:19: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Tp, _Dp>&&) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:29: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::unique_ptr<fst::SymbolTable>&&'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:7: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::nullptr_t) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>; std::nullptr_t = std::nullptr_t]'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:17: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::nullptr_t'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~~
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:656:59: error: no match for 'operator=' (operand types are 'std::unique_ptr<fst::SymbolTable>' and 'fst::SymbolTable*')
656 | osymbols_ = impl.osymbols_ ? impl.osymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: candidate: 'template<class _Up, class _Ep> typename std::enable_if<std::__and_<std::__and_<std::is_convertible<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::__uniq_ptr_impl<_Tp, _Dp>::pointer>, std::__not_<std::is_array<_Up> > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp, _Dp>&>::type std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Ep = _Up; _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
425 | operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: template argument deduction/substitution failed:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:656:59: note: mismatched types 'std::unique_ptr<_Tp, _Dp>' and 'fst::SymbolTable*'
656 | osymbols_ = impl.osymbols_ ? impl.osymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:19: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Tp, _Dp>&&) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:29: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::unique_ptr<fst::SymbolTable>&&'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:7: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::nullptr_t) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>; std::nullptr_t = std::nullptr_t]'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:17: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::nullptr_t'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~~
In file included from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/expanded-fst.h:17,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/mutable-fst.h:21,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/vector-fst.h:16,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/cache.h:17,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/compact-fst.h:19,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/lib/fst-types.cc:4:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h: In member function 'fst::internal::FstImpl<Arc>& fst::internal::FstImpl<Arc>::operator=(const fst::internal::FstImpl<Arc>&)':
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:655:59: error: no match for 'operator=' (operand types are 'std::unique_ptr<fst::SymbolTable>' and 'fst::SymbolTable*')
655 | isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
| ^~~~~~~
In file included from /nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/memory:78,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/compact-fst.h:12:
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: candidate: 'template<class _Up, class _Ep> typename std::enable_if<std::__and_<std::__and_<std::is_convertible<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::__uniq_ptr_impl<_Tp, _Dp>::pointer>, std::__not_<std::is_array<_Up> > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp, _Dp>&>::type std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Ep = _Up; _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
425 | operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: template argument deduction/substitution failed:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:655:59: note: mismatched types 'std::unique_ptr<_Tp, _Dp>' and 'fst::SymbolTable*'
655 | isymbols_ = impl.isymbols_ ? impl.isymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:19: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Tp, _Dp>&&) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:29: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::unique_ptr<fst::SymbolTable>&&'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:7: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::nullptr_t) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>; std::nullptr_t = std::nullptr_t]'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:17: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::nullptr_t'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~~
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:656:59: error: no match for 'operator=' (operand types are 'std::unique_ptr<fst::SymbolTable>' and 'fst::SymbolTable*')
656 | osymbols_ = impl.osymbols_ ? impl.osymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: candidate: 'template<class _Up, class _Ep> typename std::enable_if<std::__and_<std::__and_<std::is_convertible<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::__uniq_ptr_impl<_Tp, _Dp>::pointer>, std::__not_<std::is_array<_Up> > >, std::is_assignable<_T2&, _U2&&> >::value, std::unique_ptr<_Tp, _Dp>&>::type std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Ep = _Up; _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
425 | operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:425:9: note: template argument deduction/substitution failed:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/fst.h:656:59: note: mismatched types 'std::unique_ptr<_Tp, _Dp>' and 'fst::SymbolTable*'
656 | osymbols_ = impl.osymbols_ ? impl.osymbols_->Copy() : nullptr;
| ^~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:19: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Tp, _Dp>&&) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>]'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:409:29: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::unique_ptr<fst::SymbolTable>&&'
409 | unique_ptr& operator=(unique_ptr&&) = default;
| ^~~~~~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:7: note: candidate: 'std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::nullptr_t) [with _Tp = fst::SymbolTable; _Dp = std::default_delete<fst::SymbolTable>; std::nullptr_t = std::nullptr_t]'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~
/nix/store/9ds850ifd4jwcccpp3v14818kk74ldf2-gcc-14.2.1.20250322/include/c++/14.2.1.20250322/bits/unique_ptr.h:435:17: note: no known conversion for argument 1 from 'fst::SymbolTable*' to 'std::nullptr_t'
435 | operator=(nullptr_t) noexcept
| ^~~~~~~~~
make[2]: *** [_deps/openfst-build/src/lib/CMakeFiles/fst.dir/build.make:177: _deps/openfst-build/src/lib/CMakeFiles/fst.dir/symbol-table-ops.cc.o] Error 1
make[2]: *** Waiting for unfinished jobs....
In file included from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/accumulator.h:20,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/label-reachable.h:16,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/lookahead-matcher.h:20,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/matcher-fst.h:14,
from /nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/lib/fst.cc:12:
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/replace.h: In member function 'bool fst::internal::ReplaceFstImpl<Arc, StateTable, CacheStore>::ComputeArc(const StateTuple&, const Arc&, Arc*, uint32)':
/nix/store/xb8h6kfjbqclshgxq5ikh9maavxn3z1g-source/src/include/fst/replace.h:804:32: warning: expected 'template' keyword before dependent template name []
804 | if (arc.olabel == 0 || arc.olabel < *nonterminal_set_.begin() ||
| ^~~~~~
| template
make[2]: *** [_deps/openfst-build/src/lib/CMakeFiles/fst.dir/build.make:121: _deps/openfst-build/src/lib/CMakeFiles/fst.dir/fst.cc.o] Error 1
make[2]: *** [_deps/openfst-build/src/lib/CMakeFiles/fst.dir/build.make:107: _deps/openfst-build/src/lib/CMakeFiles/fst.dir/fst-types.cc.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:2957: _deps/openfst-build/src/lib/CMakeFiles/fst.dir/all] Error 2
make: *** [Makefile:136: all] Error 2
error: builder for '/nix/store/k0p9sqh4rrxs5s5cw7bax9fp2fq9bwz6-kaldi-0-unstable-2024-11-29.drv' failed with exit code 2
error: 1 dependencies of derivation '/nix/store/psdsjafafbc58k926hylj4ypd02ljmkj-system-path.drv' failed to build
error: 1 dependencies of derivation '/nix/store/b0sl47xa42dqkndrdgklaxx9ihb67cvf-nixos-system-tempest-25.05beta802025.cd2812de55cf.drv' failed to build