[INFO] fetching crate jyafn-qbe 2.1.1...
[INFO] checking jyafn-qbe-2.1.1 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate jyafn-qbe 2.1.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate jyafn-qbe 2.1.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate jyafn-qbe 2.1.1
[INFO] tweaked toml for crates.io crate jyafn-qbe 2.1.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate jyafn-qbe 2.1.1 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate jyafn-qbe 2.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e84d29a4564c1b4069c1fbdf960dd76d7a4a0419e72ebe00ffb607701b55a05
[INFO] running `Command { std: "docker" "start" "-a" "6e84d29a4564c1b4069c1fbdf960dd76d7a4a0419e72ebe00ffb607701b55a05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e84d29a4564c1b4069c1fbdf960dd76d7a4a0419e72ebe00ffb607701b55a05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e84d29a4564c1b4069c1fbdf960dd76d7a4a0419e72ebe00ffb607701b55a05", kill_on_drop: false }`
[INFO] [stdout] 6e84d29a4564c1b4069c1fbdf960dd76d7a4a0419e72ebe00ffb607701b55a05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bd0811462fb7f50bc7392eb0e73af0b85d6953d82343d0f462ed9dddf06f111e
[INFO] running `Command { std: "docker" "start" "-a" "bd0811462fb7f50bc7392eb0e73af0b85d6953d82343d0f462ed9dddf06f111e", kill_on_drop: false }`
[INFO] [stderr]     Checking jyafn-qbe v2.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:494:23
[INFO] [stdout]     |
[INFO] [stdout] 494 |     pub fn last_block(&mut self) -> &Block {
[INFO] [stdout]     |                       ^^^^^^^^^     ------
[INFO] [stdout]     |                       |             ||
[INFO] [stdout]     |                       |             |the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       |             the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 494 |     pub fn last_block(&mut self) -> &Block<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:494:23
[INFO] [stdout]     |
[INFO] [stdout] 494 |     pub fn last_block(&mut self) -> &Block {
[INFO] [stdout]     |                       ^^^^^^^^^     ------
[INFO] [stdout]     |                       |             ||
[INFO] [stdout]     |                       |             |the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       |             the lifetimes get resolved as `'_`
[INFO] [stdout]     |                       this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 494 |     pub fn last_block(&mut self) -> &Block<'_> {
[INFO] [stdout]     |                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `qbe`
[INFO] [stdout]  --> examples/hello_world.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use qbe::*;
[INFO] [stdout]   |     ^^^ use of unresolved module or unlinked crate `qbe`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `qbe`, use `cargo add qbe` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `jyafn-qbe` (example "hello_world") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "bd0811462fb7f50bc7392eb0e73af0b85d6953d82343d0f462ed9dddf06f111e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd0811462fb7f50bc7392eb0e73af0b85d6953d82343d0f462ed9dddf06f111e", kill_on_drop: false }`
[INFO] [stdout] bd0811462fb7f50bc7392eb0e73af0b85d6953d82343d0f462ed9dddf06f111e