docs: say how the pinned toolchain goes wrong quietly - #25
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`rust-toolchain.toml` pins the compiler and rustup honours it, but only if the
`cargo` being run is rustup's shim. A `cargo` installed elsewhere and earlier on
`PATH` does not read that file, and if `rustdoc` resolves to a different release
than `cargo` does, the workspace compiles with one compiler while its doctests
run under another:
error[E0514]: found crate `serde` compiled by an incompatible version of rustc
Nothing is wrong with the code, and the message does not say so. CONTRIBUTING.md
now names the failure, gives the two commands that show it, and says what to do.
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docs: say how the pinned toolchain goes wrong quietly
rust-toolchain.tomlpins the compiler and rustup honours it, but only if thecargobeing run is rustup's shim. Acargoinstalled elsewhere and earlier onPATHdoes not read that file, and ifrustdocresolves to a different releasethan
cargodoes, the workspace compiles with one compiler while its doctestsrun under another:
Nothing is wrong with the code, and the message does not say so. CONTRIBUTING.md
now names the failure, gives the two commands that show it, and says what to do.
Rendered from
NDDev-it-com/setup-systems@cf18ed1.https://claude.ai/code/session_011eFMKoUdWcc7Aw9vtMxH2A