Fix bug with new feature resolver and required-features. #7962
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Update cargo Update cargo 21 commits in bda50510d1daf6e9c53ad6ccf603da6e0fa8103f..7019b3ed3d539db7429d10a343b69be8c426b576 2020-03-02 18:05:34 +0000 to 2020-03-17 21:02:00 +0000 - Run through clippy (rust-lang/cargo#8015) - Fix config profiles using "dev" in `cargo test`. (rust-lang/cargo#8012) - Run CI on all PRs. (rust-lang/cargo#8011) - Add unit-graph JSON output. (rust-lang/cargo#7977) - Split workspace/validate() into multiple functions (rust-lang/cargo#8008) - Use Option::as_deref (rust-lang/cargo#8005) - De-duplicate edges (rust-lang/cargo#7993) - Revert "Disable preserving mtimes on archives" (rust-lang/cargo#7935) - Close the front door for clippy but open the back (rust-lang/cargo#7533) - Fix CHANGELOG.md typos (rust-lang/cargo#7999) - Update changelog note about crate-versions flag. (rust-lang/cargo#7998) - Bump to 0.45.0, update changelog (rust-lang/cargo#7997) - Bump libgit2 dependencies (rust-lang/cargo#7996) - Avoid buffering large amounts of rustc output. (rust-lang/cargo#7838) - Add "Updating" status for git submodules. (rust-lang/cargo#7989) - WorkspaceResolve: Use descriptive lifetime label. (rust-lang/cargo#7990) - Support old html anchors in manifest chapter. (rust-lang/cargo#7983) - Don't create hardlink for library test and integrations tests, fixing rust-lang/cargo#7960 (rust-lang/cargo#7965) - Partially revert change to filter debug_assertions. (rust-lang/cargo#7970) - Try to better handle restricted crate names. (rust-lang/cargo#7959) - Fix bug with new feature resolver and required-features. (rust-lang/cargo#7962)
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If required-features are used, then the code for checking those features would crash if a dependency was not activated. The solution here is to not be strict about only requesting activated packages.
For context, the reason this can panic is to check for any bugs in the resolver or places that make bad assumptions. I missed this particular case, though.