[INFO] fetching crate scholar 0.1.7...
[INFO] checking scholar-0.1.7 against try#ddfd70ee3c3748e597b32f416b0d15a4f6e37685 for pr-87050
[INFO] extracting crate scholar 0.1.7 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate scholar 0.1.7 on toolchain ddfd70ee3c3748e597b32f416b0d15a4f6e37685
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scholar 0.1.7
[INFO] finished tweaking crates.io crate scholar 0.1.7
[INFO] tweaked toml for crates.io crate scholar 0.1.7 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate scholar 0.1.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro-hack v0.5.15
[INFO] [stderr]   Downloaded paste v0.1.10
[INFO] [stderr]   Downloaded num-integer v0.1.42
[INFO] [stderr]   Downloaded clicolors-control v1.0.1
[INFO] [stderr]   Downloaded termios v0.3.2
[INFO] [stderr]   Downloaded unicode-width v0.1.7
[INFO] [stderr]   Downloaded console v0.10.0
[INFO] [stderr]   Downloaded memchr v2.3.3
[INFO] [stderr]   Downloaded anyhow v1.0.28
[INFO] [stderr]   Downloaded bincode v1.2.1
[INFO] [stderr]   Downloaded byteorder v1.3.4
[INFO] [stderr]   Downloaded hermit-abi v0.1.11
[INFO] [stderr]   Downloaded regex v1.3.6
[INFO] [stderr]   Downloaded nalgebra v0.21.0
[INFO] [stderr]   Downloaded getrandom v0.1.14
[INFO] [stderr]   Downloaded paste-impl v0.1.10
[INFO] [stderr]   Downloaded num-rational v0.2.4
[INFO] [stderr]   Downloaded bstr v0.2.12
[INFO] [stderr]   Downloaded libc v0.2.69
[INFO] [stderr]   Downloaded indicatif v0.14.0
[INFO] [stderr]   Downloaded csv v1.1.3
[INFO] [stderr]   Downloaded unicode-xid v0.2.0
[INFO] [stderr]   Downloaded winapi v0.3.8
[INFO] [stderr]   Downloaded approx v0.3.2
[INFO] [stderr]   Downloaded matrixmultiply v0.2.3
[INFO] [stderr]   Downloaded thiserror v1.0.15
[INFO] [stderr]   Downloaded serde_derive v1.0.106
[INFO] [stderr]   Downloaded serde v1.0.106
[INFO] [stderr]   Downloaded proc-macro2 v1.0.10
[INFO] [stderr]   Downloaded quote v1.0.3
[INFO] [stderr]   Downloaded simba v0.1.2
[INFO] [stderr]   Downloaded autocfg v1.0.0
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.6
[INFO] [stderr]   Downloaded thiserror-impl v1.0.15
[INFO] [stderr]   Downloaded generic-array v0.13.2
[INFO] [stderr]   Downloaded encode_unicode v0.3.6
[INFO] [stderr]   Downloaded num-complex v0.2.4
[INFO] [stderr]   Downloaded itoa v0.4.5
[INFO] [stderr]   Downloaded ryu v1.0.3
[INFO] [stderr]   Downloaded number_prefix v0.3.0
[INFO] [stderr]   Downloaded regex-syntax v0.6.17
[INFO] [stderr]   Downloaded rand_distr v0.2.2
[INFO] [stderr]   Downloaded num-traits v0.2.11
[INFO] [stderr]   Downloaded typenum v1.12.0
[INFO] [stderr]   Downloaded syn v1.0.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ad950aa8bcb41830d8ce31746e22e708b1a5755af219a6d9ae994c3433286d0
[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" "7ad950aa8bcb41830d8ce31746e22e708b1a5755af219a6d9ae994c3433286d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ad950aa8bcb41830d8ce31746e22e708b1a5755af219a6d9ae994c3433286d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ad950aa8bcb41830d8ce31746e22e708b1a5755af219a6d9ae994c3433286d0", kill_on_drop: false }`
[INFO] [stdout] 7ad950aa8bcb41830d8ce31746e22e708b1a5755af219a6d9ae994c3433286d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+ddfd70ee3c3748e597b32f416b0d15a4f6e37685" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7bbee2db39d8930185d63ac9c48dda6fe40620f56107cef1b260e7737024e59c
[INFO] running `Command { std: "docker" "start" "-a" "7bbee2db39d8930185d63ac9c48dda6fe40620f56107cef1b260e7737024e59c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]     Checking matrixmultiply v0.2.3
[INFO] [stderr]     Checking termios v0.3.2
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking console v0.10.0
[INFO] [stderr]     Checking indicatif v0.14.0
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling paste-impl v0.1.10
[INFO] [stderr]    Compiling thiserror-impl v1.0.15
[INFO] [stderr]     Checking paste v0.1.10
[INFO] [stderr]     Checking thiserror v1.0.15
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]     Checking simba v0.1.2
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking nalgebra v0.21.0
[INFO] [stderr]     Checking scholar v0.1.7 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 24s
[INFO] running `Command { std: "docker" "inspect" "7bbee2db39d8930185d63ac9c48dda6fe40620f56107cef1b260e7737024e59c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bbee2db39d8930185d63ac9c48dda6fe40620f56107cef1b260e7737024e59c", kill_on_drop: false }`
[INFO] [stdout] 7bbee2db39d8930185d63ac9c48dda6fe40620f56107cef1b260e7737024e59c