build fails with rustc 1.91.1

まず cargo run --release で失敗を再現し、RustPython 0.4.0 パッケージを選択している Cargo の設定と依存関係の制約を調べます。想定される Rust の互換性を特定し、報告された rustc 1.91.1 環境で結果を検証します。完了の条件は、release ビルドが成功することです。

Summary

I follow the build instruction but that failed

Expected

Build should succeed

Actual

It fails with the message:

error: rustc 1.91.1 is not supported by the following packages:

Full log

$ cargo run --release
    Updating crates.io index
    Updating git repository `https://github.com/astral-sh/ruff.git`
    Updating git repository `https://github.com/arihant2math/tkinter.git`
  Downloaded anstyle-parse v0.2.7
  Downloaded anstyle-query v1.1.5
  Downloaded atomic v0.6.1
  Downloaded asn1-rs-impl v0.2.0
  Downloaded castaway v0.2.4
  Downloaded asn1-rs-derive v0.6.0
  Downloaded openssl-probe v0.2.1
  Downloaded attribute-derive-macro v0.10.5
  Downloaded colorchoice v1.0.4
  Downloaded crypto-common v0.1.7
  Downloaded dyn-clone v1.0.20
  Downloaded endian-type v0.1.2
  Downloaded dirs-sys-next v0.1.2
  Downloaded phf_macros v0.13.1
  Downloaded phf_generator v0.13.1
  Downloaded collection_literals v1.0.3
  Downloaded manyhow-macros v0.11.4
  Downloaded mac_address v1.1.8
  Downloaded env_home v0.1.0
  Downloaded anstream v0.6.21
  Downloaded adler32 v1.2.0
  Downloaded env_filter v1.0.0
  Downloaded dirs-next v2.0.0
  Downloaded generic-array v0.14.7
  Downloaded fd-lock v4.0.4
  Downloaded quote-use-macros v0.8.4
  Downloaded rusticata-macros v4.1.0
  Downloaded flagset v0.4.7
  Downloaded gethostname v1.1.0
  Downloaded rustc-hash v2.1.1
  Downloaded result-like v0.5.1
  Downloaded home v0.5.12
  Downloaded hexf-parse v0.2.1
  Downloaded result-like-derive v0.5.1
  Downloaded get-size-derive2 v0.7.4
  Downloaded pmutil v0.6.1
  Downloaded num-conv v0.2.0
  Downloaded uname v0.1.1
  Downloaded keccak v0.1.6
  Downloaded md-5 v0.10.6
  Downloaded unicode_names2_generator v2.0.0
  Downloaded scoped-tls v1.0.1
  Downloaded is-macro v0.3.7
  Downloaded unic-common v0.9.0
  Downloaded unic-ucd-version v0.9.0
  Downloaded matches v0.1.10
  Downloaded nibble_vec v0.1.0
  Downloaded mt19937 v3.2.0
  Downloaded is_terminal_polyfill v1.70.2
  Downloaded unic-char-range v0.9.0
  Downloaded itoa v1.0.17
  Downloaded unicode-bidi-mirroring v0.4.0
  Downloaded unic-ucd-bidi v0.9.0
  Downloaded salsa20 v0.10.2
  Downloaded malachite-bigint v0.9.1
  Downloaded siphasher v1.0.2
  Downloaded phf_shared v0.13.1
  Downloaded attribute-derive v0.10.5
  Downloaded radium v1.1.1
  Downloaded base64ct v1.8.3
  Downloaded csv-core v0.1.13
  Downloaded quote-use v0.8.4
  Downloaded cmake v0.1.57
  Downloaded constant_time_eq v0.4.2
  Downloaded exitcode v1.1.2
  Downloaded der_derive v0.7.3
  Downloaded env_logger v0.11.9
  Downloaded deranged v0.5.5
  Downloaded fs_extra v1.3.0
  Downloaded time-core v0.1.8
  Downloaded data-encoding v2.10.0
  Downloaded untrusted v0.7.1
  Downloaded anstyle v1.0.13
  Downloaded interpolator v0.5.0
  Downloaded dns-lookup v3.0.1
  Downloaded sha-1 v0.10.1
  Downloaded manyhow v0.11.4
  Downloaded foldhash v0.2.0
  Downloaded unic-char-property v0.9.0
  Downloaded timsort v0.1.3
  Downloaded unic-ucd-hangul v0.9.0
  Downloaded num_enum v0.7.5
  Downloaded syn-ext v0.5.0
  Downloaded lexopt v0.3.1
  Downloaded serde_spanned v1.0.4
  Downloaded page_size v0.6.0
  Downloaded pem-rfc7468 v1.0.0
  Downloaded unic-ucd-ident v0.9.0
  Downloaded bitflags v2.11.0
  Downloaded caseless v0.2.2
  Downloaded blake2 v0.10.6
  Downloaded oid-registry v0.8.1
  Downloaded zeroize_derive v1.4.3
  Downloaded find-msvc-tools v0.1.8
  Downloaded ascii v1.1.0
  Downloaded num_enum_derive v0.7.5
  Downloaded ahash v0.8.12
  Downloaded pem-rfc7468 v0.7.0
  Downloaded optional v0.5.0
  Downloaded phf v0.13.1
  Downloaded libffi v5.1.0
  Downloaded utf8parse v0.2.2
  Downloaded libz-rs-sys v0.5.5
  Downloaded libloading v0.9.0
  Downloaded proc-macro-utils v0.10.0
  Downloaded liblzma v0.4.6
  Downloaded lexical-parse-integer v1.0.6
  Downloaded unic-ucd-category v0.9.0
  Downloaded toml_writer v1.0.6+spec-1.1.0
  Downloaded get-size2 v0.7.4
  Downloaded time-macros v0.2.27
  Downloaded thiserror-impl v2.0.18
  Downloaded unic-ucd-age v0.9.0
  Downloaded termios v0.3.3
  Downloaded unicode-casing v0.1.1
  Downloaded toml_datetime v0.7.5+spec-1.1.0
  Downloaded quote v1.0.44
  Downloaded psm v0.1.30
  Downloaded tls_codec_derive v0.4.2
  Downloaded bzip2 v0.6.1
  Downloaded getrandom v0.2.17
  Downloaded derive-where v1.6.0
  Downloaded unicode_names2_generator v1.3.0
  Downloaded log v0.4.29
  Downloaded libbz2-rs-sys v0.2.2
  Downloaded thiserror v2.0.18
  Downloaded which v8.0.0
  Downloaded tls_codec v0.4.2
  Downloaded compact_str v0.9.0
  Downloaded scrypt v0.11.0
  Downloaded der-parser v10.0.0
  Downloaded lz4_flex v0.12.0
  Downloaded rustls-pki-types v1.14.0
  Downloaded asn1-rs v0.7.1
  Downloaded rustls-pemfile v2.2.0
  Downloaded rustls-native-certs v0.8.3
  Downloaded flate2 v1.1.9
  Downloaded rand_core v0.9.5
  Downloaded cc v1.2.54
  Downloaded ar_archive_writer v0.5.1
  Downloaded pkcs5 v0.7.1
  Downloaded minimal-lexical v0.2.1
  Downloaded memchr v2.8.0
  Downloaded twox-hash v2.1.2
  Downloaded toml_parser v1.0.6+spec-1.1.0
  Downloaded indexmap v2.13.0
  Downloaded nom v7.1.3
  Downloaded lexical-util v1.0.7
  Downloaded rustls-platform-verifier v0.6.2
  Downloaded textwrap v0.16.2
  Downloaded proc-macro2 v1.0.106
  Downloaded pymath v0.1.5
  Downloaded uuid v1.22.0
  Downloaded hashbrown v0.16.1
  Downloaded ryu v1.0.22
  Downloaded unicode-ident v1.0.22
  Downloaded unic-ucd-normal v0.9.0
  Downloaded aho-corasick v1.1.4
  Downloaded ordermap v1.1.0
  Downloaded toml v0.9.11+spec-1.1.0
  Downloaded libm v0.2.16
  Downloaded socket2 v0.6.2
  Downloaded xml v1.2.1
  Downloaded widestring v1.2.1
  Downloaded lexical-parse-float v1.0.6
  Downloaded rustls-webpki v0.103.9
  Downloaded safe_arch v1.0.0
  Downloaded winresource v0.1.30
  Downloaded aws-lc-rs v1.16.0
  Downloaded malachite-q v0.9.1
  Downloaded chrono v0.4.44
  Downloaded x509-parser v0.18.1
  Downloaded x509-cert v0.2.5
  Downloaded zerocopy-derive v0.8.34
  Downloaded unicode-normalization v0.1.25
  Downloaded bstr v1.12.1
  Downloaded rustyline v17.0.2
  Downloaded object v0.37.3
  Downloaded nix v0.29.0
  Downloaded wide v1.1.1
  Downloaded winnow v0.7.14
  Downloaded unic-normal v0.9.0
  Downloaded radix_trie v0.2.1
  Downloaded zlib-rs v0.6.0
  Downloaded zlib-rs v0.5.5
  Downloaded time v0.3.47
  Downloaded webpki-roots v1.0.6
  Downloaded syn v2.0.114
  Downloaded zerocopy v0.8.34
  Downloaded jiff v0.2.18
  Downloaded unicode_names2 v2.0.0
  Downloaded unicode_names2 v1.3.0
  Downloaded rustls v0.23.37
  Downloaded ucd v0.1.1
  Downloaded rustix v1.1.3
  Downloaded libc v0.2.182
  Downloaded malachite-base v0.9.1
  Downloaded sha3 v0.10.8
  Downloaded libffi-sys v4.1.0
  Downloaded liblzma-sys v0.4.5
  Downloaded malachite-nz v0.9.1
  Downloaded aws-lc-sys v0.37.0
  Downloaded 202 crates (29.9MiB) in 9.17s (largest was `aws-lc-sys` at 9.1MiB)
error: rustc 1.91.1 is not supported by the following packages:
  rustpython@0.4.0 requires rustc 1.93.0
  rustpython@0.4.0 requires rustc 1.93.0
  rustpython@0.4.0 requires rustc 1.93.0
  rustpython@0.4.0 requires rustc 1.93.0
  rustpython-codegen@0.4.0 requires rustc 1.93.0
  rustpython-codegen@0.4.0 requires rustc 1.93.0
  rustpython-common@0.4.0 requires rustc 1.93.0
  rustpython-compiler@0.4.0 requires rustc 1.93.0
  rustpython-compiler@0.4.0 requires rustc 1.93.0
  rustpython-compiler-core@0.4.0 requires rustc 1.93.0
  rustpython-compiler-core@0.4.0 requires rustc 1.93.0
  rustpython-derive@0.4.0 requires rustc 1.93.0
  rustpython-derive-impl@0.4.0 requires rustc 1.93.0
  rustpython-doc@0.4.0 requires rustc 1.93.0
  rustpython-literal@0.4.0 requires rustc 1.93.0
  rustpython-literal@0.4.0 requires rustc 1.93.0
  rustpython-pylib@0.4.0 requires rustc 1.93.0
  rustpython-pylib@0.4.0 requires rustc 1.93.0
  rustpython-pylib@0.4.0 requires rustc 1.93.0
  rustpython-sre_engine@0.4.0 requires rustc 1.93.0
  rustpython-stdlib@0.4.0 requires rustc 1.93.0
  rustpython-stdlib@0.4.0 requires rustc 1.93.0
  rustpython-stdlib@0.4.0 requires rustc 1.93.0
  rustpython-vm@0.4.0 requires rustc 1.93.0
  rustpython-vm@0.4.0 requires rustc 1.93.0
  rustpython-vm@0.4.0 requires rustc 1.93.0
  rustpython-wtf8@0.4.0 requires rustc 1.93.0
  rustpython-wtf8@0.4.0 requires rustc 1.93.0

(Sorry, github doesnt handle backticks correctly)