[INFO] updating cached repository https://github.com/pop-os/upgrade
[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] 347df3ad9558c601cf755fe4054889aa62b2c0e2
[INFO] checking pop-os/upgrade against try#1a608893c03d7722effeb0058e82770bd36b4b3c for pr-66504-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpop-os%2Fupgrade" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pop-os/upgrade on toolchain 1a608893c03d7722effeb0058e82770bd36b4b3c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/pop-os/upgrade
[INFO] removed workspace from git repo https://github.com/pop-os/upgrade
[INFO] finished tweaking git repo https://github.com/pop-os/upgrade
[INFO] tweaked toml for git repo https://github.com/pop-os/upgrade written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/pop-os/upgrade already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/sysfs-class`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-cli-wrappers`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-fetcher`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-keyring`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-sources-lists`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/async-fetcher`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/distinst/`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/exit-status-ext`
[INFO] [stderr]     Updating git repository `https://github.com/pop-os/apt-release-file`
[INFO] [stderr]     Updating git repository `https://github.com/pwoolcoc/http-client`
[INFO] [stderr]     Updating git repository `https://github.com/pwoolcoc/surf`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-std v1.3.0
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+1a608893c03d7722effeb0058e82770bd36b4b3c" "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] 301aa994c73f3d0515e60c13a679ec7843ab270e258a1b94e3a01a70ce0e8dc5
[INFO] running `"docker" "start" "-a" "301aa994c73f3d0515e60c13a679ec7843ab270e258a1b94e3a01a70ce0e8dc5"`
[INFO] [stderr]     Checking numtoa v0.2.3
[INFO] [stderr]    Compiling isahc v0.8.2
[INFO] [stderr]     Checking cascade v0.1.4
[INFO] [stderr]     Checking iowrap v0.1.2
[INFO] [stderr]     Checking distinst-bootloader v0.1.0 (https://github.com/pop-os/distinst/#d59db4b3)
[INFO] [stderr]     Checking deb-architectures v0.1.0
[INFO] [stderr]     Checking exit-status-ext v0.1.0 (https://github.com/pop-os/exit-status-ext#46700735)
[INFO] [stderr]     Checking progress-streams v1.1.0
[INFO] [stderr]     Checking human-sort v0.2.2
[INFO] [stderr]     Checking os-release v0.1.0
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking sysfs-class v0.1.2 (https://github.com/pop-os/sysfs-class#25c8ab30)
[INFO] [stderr]     Checking envfile v0.2.1
[INFO] [stderr]     Checking errno v0.2.4
[INFO] [stderr]     Checking want v0.2.0
[INFO] [stderr]     Checking kv-log-macro v1.0.4
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling pulldown-cmark v0.2.0
[INFO] [stderr]     Checking libnghttp2-sys v0.1.2
[INFO] [stderr]     Checking lz4-sys v1.8.3
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]     Checking dbus v0.6.5
[INFO] [stderr]     Checking loopdev v0.2.1
[INFO] [stderr]     Checking exec v0.3.1
[INFO] [stderr] error[E0277]: cannot add `&std::borrow::Cow<'_, str>` to `std::string::String`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/pulldown-cmark-0.2.0/src/utils.rs:51:30
[INFO] [stderr]    |
[INFO] [stderr] 51 |         Owned(a.into_owned() + &b)
[INFO] [stderr]    |                              ^ no implementation for `std::string::String + &std::borrow::Cow<'_, str>`
[INFO] [stderr]    |
[INFO] [stderr]    = help: the trait `std::ops::Add<&std::borrow::Cow<'_, str>>` is not implemented for `std::string::String`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `pulldown-cmark`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "301aa994c73f3d0515e60c13a679ec7843ab270e258a1b94e3a01a70ce0e8dc5"`
[INFO] running `"docker" "rm" "-f" "301aa994c73f3d0515e60c13a679ec7843ab270e258a1b94e3a01a70ce0e8dc5"`
[INFO] [stdout] 301aa994c73f3d0515e60c13a679ec7843ab270e258a1b94e3a01a70ce0e8dc5