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Add a mode to build with the oldest matching version of a crate instead of the newest one #4792

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jrmuizel opened this issue Dec 7, 2017 · 1 comment
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Add a mode to build with the oldest matching version of a crate instead of the newest one #4792

jrmuizel opened this issue Dec 7, 2017 · 1 comment
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C-feature-request Category: proposal for a feature. Before PR, ping rust-lang/cargo if this is not `Feature accepted`

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@jrmuizel
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jrmuizel commented Dec 7, 2017

Sometimes an implicit dependency on a newer stable version of a crate can sneak in without the Cargo.toml file being updated.

e.g. core-foundation 0.4.6 added CFNumber::from and someone could use that function but only be specifying a dependency on 0.4 in the Cargo.toml. This is what happened here: servo/webrender#2190
@alexcrichton alexcrichton added the C-feature-request Category: proposal for a feature. Before PR, ping rust-lang/cargo if this is not `Feature accepted` label Dec 7, 2017
@Eh2406
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Eh2406 commented Mar 26, 2018

dup of #4100

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