[MacPorts] #70052: rust @1.78.0_0: error: no viable constructor or deduction guide for deduction of template arguments of 'optional' (was: rust 1.78.0_0 fails build)

[MacPorts]

#70052: rust @1.78.0_0: error: no viable constructor or deduction guide for
deduction of template arguments of 'optional'
------------------------+---------------------------------
  Reporter:  JohnFHall  |      Owner:  MarcusCalhoun-Lopez
      Type:  defect     |     Status:  assigned
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.9.3
Resolution:             |   Keywords:
      Port:  rust       |
------------------------+---------------------------------
Changes (by ryandesign):

 * owner:  (none) => MarcusCalhoun-Lopez
 * status:  new => assigned


Old description:

> :info:build FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/Program.cpp.o

New description:

 {{{
 :info:build FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/Program.cpp.o
 }}}

--

Comment:

 First error in log looks like:

 {{{
 :info:build
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_rust/rust/work/rustc-1.78.0-src/src
 /llvm-project/llvm/lib/Support/Program.cpp:46:49: error: no viable
 constructor or deduction guide for deduction of template arguments of
 'optional'
 :info:build         PI, SecondsToWait == 0 ? std::nullopt :
 std::optional(SecondsToWait),
 :info:build                                                 ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:684:41:
 note: candidate template ignored: couldn't infer template argument '_Tp'
 :info:build     _LIBCPP_INLINE_VISIBILITY constexpr optional(nullopt_t)
 noexcept {}
 :info:build                                         ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:690:24:
 note: candidate template ignored: couldn't infer template argument '_Tp'
 :info:build     constexpr explicit optional(in_place_t, _Args&&... __args)
 :info:build                        ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:704:15:
 note: candidate template ignored: couldn't infer template argument '_Tp'
 :info:build     constexpr optional(_Up&& __v)
 :info:build               ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:711:24:
 note: candidate template ignored: couldn't infer template argument '_Tp'
 :info:build     constexpr explicit optional(_Up&& __v)
 :info:build                        ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:580:7:
 note: candidate template ignored: could not match 'optional<_Tp>' against
 'unsigned int'
 :info:build class optional
 :info:build       ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:682:41:
 note: candidate template ignored: could not match 'optional<_Tp>' against
 'unsigned int'
 :info:build     _LIBCPP_INLINE_VISIBILITY constexpr optional(const
 optional&) = default;
 :info:build                                         ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:683:41:
 note: candidate template ignored: could not match 'optional<_Tp>' against
 'unsigned int'
 :info:build     _LIBCPP_INLINE_VISIBILITY constexpr optional(optional&&) =
 default;
 :info:build                                         ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:719:5:
 note: candidate template ignored: could not match 'optional<type-
 parameter-0-1>' against 'unsigned int'
 :info:build     optional(const optional<_Up>& __v)
 :info:build     ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:727:14:
 note: candidate template ignored: could not match 'optional<type-
 parameter-0-1>' against 'unsigned int'
 :info:build     explicit optional(const optional<_Up>& __v)
 :info:build              ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:737:5:
 note: candidate template ignored: could not match 'optional<type-
 parameter-0-1>' against 'unsigned int'
 :info:build     optional(optional<_Up>&& __v)
 :info:build     ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:745:14:
 note: candidate template ignored: could not match 'optional<type-
 parameter-0-1>' against 'unsigned int'
 :info:build     explicit optional(optional<_Up>&& __v)
 :info:build              ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:681:41:
 note: candidate function template not viable: requires 0 arguments, but 1
 was provided
 :info:build     _LIBCPP_INLINE_VISIBILITY constexpr optional() noexcept {}
 :info:build                                         ^
 :info:build
 /Library/Developer/CommandLineTools/usr/include/c++/v1/optional:697:24:
 note: candidate function template not viable: requires at least 2
 arguments, but 1 was provided
 :info:build     constexpr explicit optional(in_place_t,
 initializer_list<_Up> __il, _Args&&... __args)
 :info:build                        ^
 :info:build 1 error generated.
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/70052#comment:1>
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