[INFO] crate pyflow 0.2.7 is already in cache
[INFO] testing pyflow-0.2.7 against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] extracting crate pyflow 0.2.7 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate pyflow 0.2.7 on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pyflow 0.2.7
[INFO] finished tweaking crates.io crate pyflow 0.2.7
[INFO] tweaked toml for crates.io crate pyflow 0.2.7 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate pyflow 0.2.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d0af0b862dd6291f5a20cadb19d14f853fae32c9dffd297dc580095ac2253c77
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d0af0b862dd6291f5a20cadb19d14f853fae32c9dffd297dc580095ac2253c77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d0af0b862dd6291f5a20cadb19d14f853fae32c9dffd297dc580095ac2253c77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0af0b862dd6291f5a20cadb19d14f853fae32c9dffd297dc580095ac2253c77", kill_on_drop: false }`
[INFO] [stdout] d0af0b862dd6291f5a20cadb19d14f853fae32c9dffd297dc580095ac2253c77
[INFO] running `Command { std: "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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83c48cc96280418c288cf778365e5a1188607aeb71982f080c4d0224153c9a11
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "83c48cc96280418c288cf778365e5a1188607aeb71982f080c4d0224153c9a11", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling futures v0.1.29
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling untrusted v0.7.0
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling adler32 v1.0.4
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling yaml-rust v0.3.5
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling fs_extra v1.1.0
[INFO] [stderr]    Compiling try_from v0.3.2
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling ring v0.16.12
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.36
[INFO] [stderr]    Compiling bzip2-sys v0.1.8+1.0.8
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling lzma-sys v0.1.15
[INFO] [stderr]    Compiling miniz_oxide v0.3.6
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling encoding_rs v0.8.22
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling crossterm_utils v0.4.0
[INFO] [stderr]    Compiling term_size v0.3.1
[INFO] [stderr]    Compiling crossterm_utils v0.3.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling filetime v0.2.9
[INFO] [stderr]    Compiling dirs-sys v0.3.4
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling hyper v0.12.35
[INFO] [stderr]    Compiling smallvec v0.6.13
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling crossterm_screen v0.3.2
[INFO] [stderr]    Compiling crossterm_style v0.5.2
[INFO] [stderr]    Compiling crossterm_cursor v0.3.1
[INFO] [stderr]    Compiling directories v2.0.2
[INFO] [stderr]    Compiling mio v0.6.21
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling flate2 v1.0.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling crossterm_input v0.4.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling tokio-sync v0.1.8
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling want v0.2.0
[INFO] [stderr]    Compiling aho-corasick v0.7.10
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling http v0.1.21
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling xz2 v0.1.6
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling tokio-timer v0.2.13
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling crossterm_input v0.5.0
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]    Compiling zip v0.5.5
[INFO] [stderr]    Compiling regex v1.3.7
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling crossterm_cursor v0.4.0
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling crossterm_terminal v0.3.2
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling crossterm v0.11.1
[INFO] [stderr]    Compiling uuid v0.7.4
[INFO] [stderr]    Compiling webpki v0.21.2
[INFO] [stderr]    Compiling sct v0.6.0
[INFO] [stderr]    Compiling publicsuffix v1.5.4
[INFO] [stderr]    Compiling ct-logs v0.6.0
[INFO] [stderr]    Compiling h2 v0.1.26
[INFO] [stderr]    Compiling http-body v0.1.0
[INFO] [stderr]    Compiling rustls v0.16.0
[INFO] [stderr]    Compiling webpki-roots v0.17.0
[INFO] [stderr]    Compiling tokio-rustls v0.10.3
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling hyper-rustls v0.17.1
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling structopt-derive v0.4.7
[INFO] [stderr]    Compiling structopt v0.3.14
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling reqwest v0.9.24
[INFO] [stderr]    Compiling pyflow v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/install.rs:405:29
[INFO] [stdout]     |
[INFO] [stdout] 405 |                 util::abort(error);
[INFO] [stdout]     |                             ^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             expected `&str`, found struct `std::string::String`
[INFO] [stdout]     |                             help: consider borrowing here: `&error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pyflow`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "83c48cc96280418c288cf778365e5a1188607aeb71982f080c4d0224153c9a11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83c48cc96280418c288cf778365e5a1188607aeb71982f080c4d0224153c9a11", kill_on_drop: false }`
[INFO] [stdout] 83c48cc96280418c288cf778365e5a1188607aeb71982f080c4d0224153c9a11