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fix: compilation error when used as a dependency #470
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Pasted the error in a gist: https://gist.github.com/koivunej/a57c843758b01bd82e9883d9c997e857 |
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Thought of keeping the back and forth of "ci: add dependent crate" to remind what went down, but will probably just clean it up if it now builds ok. |
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Finally the expansions between async-trait versions: https://gist.github.com/koivunej/cbcaae52b7242a73419ef62e4c606bd7 |
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lgtm |
see comments in rs-ipfs#458. it is unknown why this is needed but it does work away of the compiler error. it was later found out by bisecting Cargo.lock that this is caused by async-trait 0.1.42 => 0.1.43 upgrade, but it's very unclear why this would be caused by the only PR in that release.
either required the use of the empty stream, which probably was an additional extra type which is now worked away with.
this was kept around for ipfs-http but it lead to problems using the ipfs crate as a dependency.
hopefully this will catch if we go out of sync with some upstream crates.
this was not set originally because probably mpart-async sets it, but the code in `ipfs` assumed `std` feature was enabled and thus the from conversion was accessible.
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Cancelling, letting bors handle. bors r+ |
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Aug 4, 2021
470: fix: compilation error when used as a dependency r=koivunej a=koivunej Fixes the issue reported in [comment of #458](#458 (comment)) that whenever dependent on, even without any code calling `ipfs`, there is a build failure. This PR: - removes top-level Cargo.lock now that I've learned why it's not good to keep around - adds weekly scheduled build - moves the `FsBlockStore::list` method body over to `FsBlockStore::list0` outside the `#[async_trait] impl BlockStore for FsBlockStore { ... }` where it does get the correct lifetimes inferred for the returned boxed future The original compilation failure was caused by `async-trait` 0.1.42 => 0.1.43 upgrade deduced by bisecting Cargo.lock changes. It's still unknown why does the moved version work, but there are probably a lot of subleties to the code generated by `async-trait`. I don't yet know if this warrants any upstream bug reports; most likely not, we were stuck on a quite old version and many crates now work with it. Co-authored-by: Joonas Koivunen <[email protected]>
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Hmm.... Wonder what's happening. bors ping |
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pong |
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Cannot find any related bug reports... bors r+ |
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Aah found it for the earlier merge from the logs, it was a crash: |
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Build succeeded: |
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Fixes the issue reported in comment of #458 that whenever dependent on, even without any code calling
ipfs, there is a build failure. This PR:FsBlockStore::listmethod body over toFsBlockStore::list0outside the#[async_trait] impl BlockStore for FsBlockStore { ... }where it does get the correct lifetimes inferred for the returned boxed futureThe original compilation failure was caused by
async-trait0.1.42 => 0.1.43 upgrade deduced by bisecting Cargo.lock changes. It's still unknown why does the moved version work, but there are probably a lot of subleties to the code generated byasync-trait. I don't yet know if this warrants any upstream bug reports; most likely not, we were stuck on a quite old version and many crates now work with it.