fix CI "build wheels" step for rustup no longer installing default toolchain (Cherry-pick of #22037) #22039
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…olchain (#22037) Fix the "Build wheels" step for a breaking change in [Rustup v1.28.0](https://blog.rust-lang.org/2025/03/02/Rustup-1.28.0.html) which no longer installs a default toolchain any more. Use `rustup default` to install the applicable toolchain because it is idempotent and will install the toolchain if it is not already installed. `rustup toolchain install` by design will try to install even if the toolchain is already installed. See rust-lang/rustup#710 for discussion of this distinction. Closes #22036
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Mar 4, 2025
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Fix the "Build wheels" step for a breaking change in Rustup v1.28.0 which no longer installs a default toolchain any more.
Use
rustup defaultto install the applicable toolchain because it is idempotent and will install the toolchain if it is not already installed.rustup toolchain installby design will try to install even if the toolchain is already installed. See rust-lang/rustup#710 for discussion of this distinction.Closes #22036