[INFO] crate ubuntu-version 0.2.0 is already in cache
[INFO] checking ubuntu-version-0.2.0 against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] extracting crate ubuntu-version 0.2.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ubuntu-version 0.2.0 on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ubuntu-version 0.2.0
[INFO] finished tweaking crates.io crate ubuntu-version 0.2.0
[INFO] tweaked toml for crates.io crate ubuntu-version 0.2.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate ubuntu-version 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 400ae61db599206abb60c2fc597be9eb9e01b31696d7fbd279717a3b8176ebc2
[INFO] running `"docker" "start" "-a" "400ae61db599206abb60c2fc597be9eb9e01b31696d7fbd279717a3b8176ebc2"`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]     Checking os-release v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.9
[INFO] [stderr]     Checking thiserror v1.0.9
[INFO] [stderr]     Checking ubuntu-version v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0425]: cannot find value `_0` in this scope
[INFO] [stderr]   --> src/version.rs:11:52
[INFO] [stderr]    |
[INFO] [stderr] 11 |     #[error("failed to fetch /etc/os-release: {}", _0)]
[INFO] [stderr]    |                                                    ^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `_0` in this scope
[INFO] [stderr]   --> src/version.rs:13:42
[INFO] [stderr]    |
[INFO] [stderr] 13 |     #[error("version parsing error: {}", _0)]
[INFO] [stderr]    |                                          ^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `_0` in this scope
[INFO] [stderr]   --> src/version.rs:19:69
[INFO] [stderr]    |
[INFO] [stderr] 19 |     #[error("release version component was not a number: found {}", _0)]
[INFO] [stderr]    |                                                                     ^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `_0` in this scope
[INFO] [stderr]   --> src/version.rs:21:74
[INFO] [stderr]    |
[INFO] [stderr] 21 |     #[error("invalid minor release version: expected 4 or 10, found {}", _0)]
[INFO] [stderr]    |                                                                          ^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `_0` in this scope
[INFO] [stderr]   --> src/version.rs:11:52
[INFO] [stderr]    |
[INFO] [stderr] 11 |     #[error("failed to fetch /etc/os-release: {}", _0)]
[INFO] [stderr]    |                                                    ^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `_0` in this scope
[INFO] [stderr]   --> src/version.rs:13:42
[INFO] [stderr]    |
[INFO] [stderr] 13 |     #[error("version parsing error: {}", _0)]
[INFO] [stderr]    |                                          ^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `_0` in this scope
[INFO] [stderr]   --> src/version.rs:19:69
[INFO] [stderr]    |
[INFO] [stderr] 19 |     #[error("release version component was not a number: found {}", _0)]
[INFO] [stderr]    |                                                                     ^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `_0` in this scope
[INFO] [stderr]   --> src/version.rs:21:74
[INFO] [stderr]    |
[INFO] [stderr] 21 |     #[error("invalid minor release version: expected 4 or 10, found {}", _0)]
[INFO] [stderr]    |                                                                          ^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: could not compile `ubuntu-version`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: could not compile `ubuntu-version`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "400ae61db599206abb60c2fc597be9eb9e01b31696d7fbd279717a3b8176ebc2"`
[INFO] running `"docker" "rm" "-f" "400ae61db599206abb60c2fc597be9eb9e01b31696d7fbd279717a3b8176ebc2"`
[INFO] [stdout] 400ae61db599206abb60c2fc597be9eb9e01b31696d7fbd279717a3b8176ebc2