Building with emsdk 3.1.68 fails due to consteval of non-const expression in fmtlib

[kirkrodrigues]

Bug

When building clp-ffi-js with the latest version of emsdk (3.1.68), the build fails with the following error:

In file included from /root/clp-ffi-js/src/submodules/fmt/src/format.cc:8:
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format-inl.h:2514:30: error: call to consteval function 'fmt::basic_format_string<char, unsigned int &>::basic_format_string<FMT_COMPILE_STRING, 0>' is not a constant expression
 2514 |         out = format_to(out, FMT_STRING("{:x}"), value);
      |                              ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2155:23: note: expanded from macro 'FMT_STRING'
 2155 | #define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
      |                       ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2132:3: note: expanded from macro 'FMT_STRING_IMPL'
 2132 |   [] {                                                                     \
      |   ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2712:51: note: subexpression not valid in a constant expression
 2712 |     context_.advance_to(context_.begin() + (begin - &*context_.begin()));
      |                                             ~~~~~~^~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2371:15: note: in call to 'handler.on_format_specs(0, &"{:x}"[2], &"{:x}"[4])'
 2371 |       begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2396:21: note: in call to 'parse_replacement_field<char, fmt::detail::format_string_checker<char, fmt::detail::error_handler, unsigned int> &>(&"{:x}"[1], &"{:x}"[4], checker(s, {}))'
 2396 |         begin = p = parse_replacement_field(p - 1, end, handler);
      |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2845:7: note: in call to 'parse_format_string<true, char, fmt::detail::format_string_checker<char, fmt::detail::error_handler, unsigned int>>({&"{:x}"[0], 4}, checker(s, {}))'
 2845 |       detail::parse_format_string<true>(str_, checker(s, {}));
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format-inl.h:2514:30: note: in call to 'basic_format_string<FMT_COMPILE_STRING, 0>([] {
    struct FMT_COMPILE_STRING : fmt::compile_string {
        using char_type = fmt::remove_cvref_t<decltype("{:x}"[0])>;
        [[maybe_unused]] constexpr operator fmt::basic_string_view<char_type>() const {
            return fmt::detail_exported::compile_string_to_view<char_type>("{:x}");
        }
    };
    return FMT_COMPILE_STRING();
}())'
 2514 |         out = format_to(out, FMT_STRING("{:x}"), value);
      |                              ^~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2155:23: note: expanded from macro 'FMT_STRING'
 2155 | #define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2132:3: note: expanded from macro 'FMT_STRING_IMPL'
 2132 |   [] {                                                                     \
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2133 |     /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2134 |     /* Use a macro-like name to avoid shadowing warnings. */               \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2135 |     struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base {           \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2136 |       using char_type = fmt::remove_cvref_t<decltype(s[0])>;               \
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2137 |       FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit                              \
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2138 |       operator fmt::basic_string_view<char_type>() const {                 \
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2139 |         return fmt::detail_exported::compile_string_to_view<char_type>(s); \
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2140 |       }                                                                    \
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2141 |     };                                                                     \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2142 |     return FMT_COMPILE_STRING();                                           \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2143 |   }()
      |   ~~~
In file included from /root/clp-ffi-js/src/submodules/fmt/src/format.cc:8:
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format-inl.h:2518:28: error: call to consteval function 'fmt::basic_format_string<char, unsigned int &>::basic_format_string<FMT_COMPILE_STRING, 0>' is not a constant expression
 2518 |       out = format_to(out, FMT_STRING("{:08x}"), value);
      |                            ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2155:23: note: expanded from macro 'FMT_STRING'
 2155 | #define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
      |                       ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2132:3: note: expanded from macro 'FMT_STRING_IMPL'
 2132 |   [] {                                                                     \
      |   ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2712:51: note: subexpression not valid in a constant expression
 2712 |     context_.advance_to(context_.begin() + (begin - &*context_.begin()));
      |                                             ~~~~~~^~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2371:15: note: in call to 'handler.on_format_specs(0, &"{:08x}"[2], &"{:08x}"[6])'
 2371 |       begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
      |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2396:21: note: in call to 'parse_replacement_field<char, fmt::detail::format_string_checker<char, fmt::detail::error_handler, unsigned int> &>(&"{:08x}"[1], &"{:08x}"[6], checker(s, {}))'
 2396 |         begin = p = parse_replacement_field(p - 1, end, handler);
      |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2132:3: note: expanded from macro 'FMT_STRING_IMPL'
2132 |   [] {                                                                     \
     |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2133 |     /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
     |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2134 |     /* Use a macro-like name to avoid shadowing warnings. */               \
     |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2135 |     struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base {           \
     |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2136 |       using char_type = fmt::remove_cvref_t<decltype(s[0])>;               \
     |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2137 |       FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit                              \
     |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2138 |       operator fmt::basic_string_view<char_type>() const {                 \
     |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2139 |         return fmt::detail_exported::compile_string_to_view<char_type>(s); \
     |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2140 |       }                                                                    \
     |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2141 |     };                                                                     \
     |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2142 |     return FMT_COMPILE_STRING();                                           \
     |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2143 |   }()
     |   ~~~
In file included from /root/clp-ffi-js/src/submodules/fmt/src/format.cc:8:
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format-inl.h:2518:28: error: call to consteval function 'fmt::basic_format_string<char, unsigned int &>::basic_format_string<FMT_COMPILE_STRING, 0>' is not a constant expression
2518 |       out = format_to(out, FMT_STRING("{:08x}"), value);
     |                            ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2155:23: note: expanded from macro 'FMT_STRING'
2155 | #define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
     |                       ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2132:3: note: expanded from macro 'FMT_STRING_IMPL'
2132 |   [] {                                                                     \
     |   ^
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2712:51: note: subexpression not valid in a constant expression
2712 |     context_.advance_to(context_.begin() + (begin - &*context_.begin()));
     |                                             ~~~~~~^~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2371:15: note: in call to 'handler.on_format_specs(0, &"{:08x}"[2], &"{:08x}"[6])'
2371 |       begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
     |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2396:21: note: in call to 'parse_replacement_field<char, fmt::detail::format_string_checker<char, fmt::detail::error_handler, unsigned int> &>(&"{:08x}"[1], &"{:08x}"[6], checker(s, {}))'
2396 |         begin = p = parse_replacement_field(p - 1, end, handler);
     |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/core.h:2845:7: note: in call to 'parse_format_string<true, char, fmt::detail::format_string_checker<char, fmt::detail::error_handler, unsigned int>>({&"{:08x}"[0], 6}, checker(s, {}))'
 2845 |       detail::parse_format_string<true>(str_, checker(s, {}));
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format-inl.h:2518:28: note: in call to 'basic_format_string<FMT_COMPILE_STRING, 0>([] {
    struct FMT_COMPILE_STRING : fmt::compile_string {
        using char_type = fmt::remove_cvref_t<decltype("{:08x}"[0])>;
        [[maybe_unused]] constexpr operator fmt::basic_string_view<char_type>() const {
            return fmt::detail_exported::compile_string_to_view<char_type>("{:08x}");
        }
    };
    return FMT_COMPILE_STRING();
}())'
 2518 |       out = format_to(out, FMT_STRING("{:08x}"), value);
      |                            ^~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2155:23: note: expanded from macro 'FMT_STRING'
 2155 | #define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::compile_string, )
      |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/root/clp-ffi-js/src/submodules/fmt/include/fmt/format.h:2132:3: note: expanded from macro 'FMT_STRING_IMPL'
 2132 |   [] {                                                                     \
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2133 |     /* Use the hidden visibility as a workaround for a GCC bug (#1973). */ \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2134 |     /* Use a macro-like name to avoid shadowing warnings. */               \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2135 |     struct FMT_GCC_VISIBILITY_HIDDEN FMT_COMPILE_STRING : base {           \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2136 |       using char_type = fmt::remove_cvref_t<decltype(s[0])>;               \
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2137 |       FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit                              \
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2138 |       operator fmt::basic_string_view<char_type>() const {                 \
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2139 |         return fmt::detail_exported::compile_string_to_view<char_type>(s); \
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2140 |       }                                                                    \
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2141 |     };                                                                     \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2142 |     return FMT_COMPILE_STRING();                                           \
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 2143 |   }()
      |   ~~~
2 errors generated.
gmake[3]: *** [CMakeFiles/ClpFfiJs.dir/build.make:197: CMakeFiles/ClpFfiJs.dir/src/submodules/fmt/src/format.cc.o] Error 1
gmake[3]: *** Waiting for unfinished jobs....
gmake[2]: *** [CMakeFiles/Makefile2:83: CMakeFiles/ClpFfiJs.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:90: CMakeFiles/ClpFfiJs.dir/rule] Error 2
gmake: *** [Makefile:124: ClpFfiJs] Error 2
exit status 2

Locking emsdk's version to 3.1.67 and performing a clean build resolves the issue.

clp-ffi-js version

a6a518f

Environment

Ubuntu 22.04 (Jammy)

Reproduction steps

task clean
task

[junhaoliao]

The issue is also reported in the Emscripten repo: emscripten-core/emsdk#1480