[INFO] updating cached repository https://github.com/pop-os/ubuntu-version
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9fd2d0134f7166961c2e4836ad9e5d8917f82255
[INFO] checking pop-os/ubuntu-version against try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpop-os%2Fubuntu-version" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pop-os/ubuntu-version on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/pop-os/ubuntu-version
[INFO] finished tweaking git repo https://github.com/pop-os/ubuntu-version
[INFO] tweaked toml for git repo https://github.com/pop-os/ubuntu-version written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] f6c92f8babfee992d4b4cdb02b03f53186147b77360d1962d2e6b08adae3b647
[INFO] running `"docker" "start" "-a" "f6c92f8babfee992d4b4cdb02b03f53186147b77360d1962d2e6b08adae3b647"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking os-release v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.10
[INFO] [stderr]     Checking thiserror v1.0.10
[INFO] [stderr]     Checking ubuntu-version v0.2.1 (/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: 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[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] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f6c92f8babfee992d4b4cdb02b03f53186147b77360d1962d2e6b08adae3b647"`
[INFO] running `"docker" "rm" "-f" "f6c92f8babfee992d4b4cdb02b03f53186147b77360d1962d2e6b08adae3b647"`
[INFO] [stdout] f6c92f8babfee992d4b4cdb02b03f53186147b77360d1962d2e6b08adae3b647