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Improve error message when default components are unavailable on a new toolchain - #5000

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Improve error message when default components are unavailable on a new toolchain#5000
borngraced wants to merge 1 commit into
rust-lang:mainfrom
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after adding a component (e.g. miri) on one toolchain, rustup try installing it on every other toolchain, failing with no explanation when unavailable there rustup error will now explain the cause and points to rustup set profile minimal.

@borngraced
borngraced force-pushed the main branch 2 times, most recently from 16aec91 to 5214d3c Compare August 8, 2026 20:35
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