Warn about metadata loader errors #53470
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r? @eddyb (rust_highfive has picked a reviewer for you, use r? to override) |
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Hm so in my mind with compiler warnings there should be something actionable to make it go away, but in this case it may not be much that the user can do? I feel like we've added this sort of error handling in the past because it came up in real-world situations, although I don't remember precisely! I think it had something to do with parallel builds though in that rustc was trying to read half-written archives, which I believe should be safely (and silently) ignored, right? |
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You can still ignore it using this PR, but this makes it easier to find out what's going on when having a bug in your own |
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Could this be gated somehow in that case? I'm worried about this printing warnings for normal Cargo compiles and users can't do anything to squelch the warnings. |
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How should I gate it? Add a -Z flag, add a env var, ... |
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A -Z flag seems reasonable to me! |
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Ping from triage @bjorn3: Some changes have been requested to your PR, do you think you'll be able to work on those? |
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Yes, I hope to do it tomorrow, if I dont forget that I opened this pr again. |
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Ping from triage, @bjorn3 ! |
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I have turned the |
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The job Click to expand the log.I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact |
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Ready for review |
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ping @alexcrichton |
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@bors: r+ |
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📌 Commit de49681 has been approved by |
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@bors rollup |
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Sep 20, 2018
…crichton Warn about metadata loader errors Output when writing corrupting to libcore.rlib ``` warning: no metadata found: failed to read rlib metadata in '/Users/bjorn/Documents/rust_fork/build/x86_64-apple-darwin/stage1-std/x86_64-apple-darwin/release/deps/libcore-857d662d379c5d0c.rlib': File too small to be an archive error[E0463]: can't find crate for `core` error: aborting due to previous error ``` Fixes rust-lang#53381
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Rollup of 15 pull requests Successful merges: - #52813 (Duration div mul extras) - #53470 (Warn about metadata loader errors) - #54233 (Remove LLVM 3.9 workaround.) - #54257 (Switch wasm math symbols to their original names) - #54258 (Enable fatal warnings for the wasm32 linker) - #54266 (Update LLVM to fix "bool" arguments on PPC32) - #54290 (Switch linker for aarch64-pc-windows-msvc from LLD to MSVC) - #54292 (Suggest array indexing when tuple indexing on an array) - #54295 (A few cleanups and minor improvements to rustc/traits) - #54298 (miri: correctly compute expected alignment for field) - #54333 (Update The Book to latest) - #54337 (Remove unneeded clone() from tests in librustdoc) - #54346 (rustc: future-proof error reporting for polymorphic constants in types.) - #54362 (Pass --batch to gdb) - #54367 (Add regression test for thread local static mut borrows)
This was referenced Aug 27, 2021
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Output when writing corrupting to libcore.rlib
Fixes #53381