Cargo occasionally says 'error: failed to verify checksum'

[jyn514]

Oct 09 17:00:01 docsrs cratesfyi[23690]: 2020/10/09 17:00:01 [INFO] rustwide::cmd: running `Command { std: "/home/cratesfyi/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
Oct 09 17:00:01 docsrs cratesfyi[23690]: 2020/10/09 17:00:01 [INFO] rustwide::cmd: [stderr]  Downloading crates ...
Oct 09 17:00:01 docsrs cratesfyi[23690]: 2020/10/09 17:00:01 [INFO] rustwide::cmd: [stderr]   Downloaded syn v1.0.43
Oct 09 17:00:02 docsrs cratesfyi[23690]: 2020/10/09 17:00:02 [INFO] rustwide::cmd: [stderr]   Downloaded syn-test-suite v0.0.0
Oct 09 17:00:02 docsrs cratesfyi[23690]: 2020/10/09 17:00:02 [INFO] rustwide::cmd: [stderr] error: failed to verify the checksum of `syn-test-suite v0.0.0`
Oct 09 17:00:02 docsrs cratesfyi[23690]: 2020/10/09 17:00:02 [ERROR] docs_rs::build_queue: Failed to build package syn-1.0.43 from queue: command failed: exit code: 101
Oct 09 17:00:02 docsrs cratesfyi[23690]: Backtrace:    0: failure::backtrace::internal::InternalBacktrace::new
Oct 09 17:00:02 docsrs cratesfyi[23690]:    1: <failure::backtrace::Backtrace as core::default::Default>::default
Oct 09 17:00:02 docsrs cratesfyi[23690]:    2: rustwide::prepare::Prepare::fetch_deps
Oct 09 17:00:02 docsrs cratesfyi[23690]:    3: rustwide::prepare::Prepare::prepare
Oct 09 17:00:02 docsrs cratesfyi[23690]:    4: rustwide::build::BuildBuilder::run
Oct 09 17:00:02 docsrs cratesfyi[23690]:    5: docs_rs::docbuilder::rustwide_builder::RustwideBuilder::build_package
Oct 09 17:00:02 docsrs cratesfyi[23690]:    6: docs_rs::build_queue::BuildQueue::process_next_crate
Oct 09 17:00:02 docsrs cratesfyi[23690]:    7: <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once
Oct 09 17:00:02 docsrs cratesfyi[23690]:    8: docs_rs::utils::queue_builder::queue_builder
Oct 09 17:00:02 docsrs cratesfyi[23690]:    9: std::sys_common::backtrace::__rust_begin_short_backtrace
Oct 09 17:00:02 docsrs cratesfyi[23690]:   10: core::ops::function::FnOnce::call_once{{vtable.shim}}
Oct 09 17:00:02 docsrs cratesfyi[23690]:   11: <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
Oct 09 17:00:02 docsrs cratesfyi[23690]:              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/liballoc/boxed.rs:1076
Oct 09 17:00:02 docsrs cratesfyi[23690]:       <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once
Oct 09 17:00:02 docsrs cratesfyi[23690]:              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/liballoc/boxed.rs:1076
Oct 09 17:00:02 docsrs cratesfyi[23690]:       std::sys::unix::thread::Thread::new::thread_start
Oct 09 17:00:02 docsrs cratesfyi[23690]:              at /rustc/d3fb005a39e62501b8b0b356166e515ae24e2e54/src/libstd/sys/unix/thread.rs:87
Oct 09 17:00:02 docsrs cratesfyi[23690]:   12: start_thread
Oct 09 17:00:02 docsrs cratesfyi[23690]:   13: __clone
lines 452115-452151

[jyn514]

Strangely the build for syn 1.0.43 seems to have worked fine. Maybe this is for a cross-compiled target? https://docs.rs/syn/1.0.43/syn/index.html

[Nemo157]

syn-test-suite v0.0.0 is messed up, I noticed this crate a lot when working on https://gist.github.com/Nemo157/d9efafac719ead283282d2346f018987.

Interesting thing to notice in syn 1.0.43 is that its Cargo.lock contains syn-test-suite 0.0.0+test, but there's also a published syn-test-suite 0.0.0; so Cargo is probably hitting some bug to do with invalid version duplication with different build metadata.

[Nemo157]

Yeah, testing it this error is what is emitted if you have 0.0.0 specified as the version and the checksum from 0.0.0+test. Caused by rust-lang/cargo#7180

[jyn514]

Hmm, interesting. Since it's not a docs.rs bug and the cargo bug already has an issue I'm going to close this.