[INFO] fetching crate flowsamples 0.34.4...
[INFO] checking flowsamples-0.34.4 against master#836c31742687ba4e2f857b5b698e1e9e6b67619c for pr-81789
[INFO] extracting crate flowsamples 0.34.4 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate flowsamples 0.34.4 on toolchain 836c31742687ba4e2f857b5b698e1e9e6b67619c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flowsamples 0.34.4
[INFO] finished tweaking crates.io crate flowsamples 0.34.4
[INFO] tweaked toml for crates.io crate flowsamples 0.34.4 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate flowsamples 0.34.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be2e2c07139217ca7f4c3730b38f83453d4dad2e51c9088b1a15d7b1b7d1b671
[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" "be2e2c07139217ca7f4c3730b38f83453d4dad2e51c9088b1a15d7b1b7d1b671", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be2e2c07139217ca7f4c3730b38f83453d4dad2e51c9088b1a15d7b1b7d1b671", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be2e2c07139217ca7f4c3730b38f83453d4dad2e51c9088b1a15d7b1b7d1b671", kill_on_drop: false }`
[INFO] [stdout] be2e2c07139217ca7f4c3730b38f83453d4dad2e51c9088b1a15d7b1b7d1b671
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+836c31742687ba4e2f857b5b698e1e9e6b67619c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef4a94fb2deecba05acd782f24b55b4fcb1d8935827052f2f5d66e2f445bc338
[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" "ef4a94fb2deecba05acd782f24b55b4fcb1d8935827052f2f5d66e2f445bc338", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling curl v0.4.35
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]     Checking openssl-probe v0.1.2
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling curl-sys v0.4.41+curl-7.75.0
[INFO] [stderr]    Compiling tinyvec v1.1.1
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling openssl-sys v0.9.61
[INFO] [stderr]     Checking unicode-normalization v0.1.17
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling socket2 v0.3.19
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]    Compiling syn v1.0.65
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking idna v0.2.2
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]    Compiling serial_test_derive v0.5.1
[INFO] [stderr]     Checking serial_test v0.5.1
[INFO] [stderr]     Checking simpath v2.1.5
[INFO] [stderr]    Compiling flowsamples v0.34.4 (/opt/rustwide/workdir)
[INFO] [stderr] error: failed to run custom build command for `flowsamples v0.34.4 (/opt/rustwide/workdir)`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/flowsamples-ee6e254857525b24/build-script-build` (exit status: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Error: Custom { kind: Other, error: "`flowc` could not be found in `$PATH` or `target/`" }
[INFO] running `Command { std: "docker" "inspect" "ef4a94fb2deecba05acd782f24b55b4fcb1d8935827052f2f5d66e2f445bc338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef4a94fb2deecba05acd782f24b55b4fcb1d8935827052f2f5d66e2f445bc338", kill_on_drop: false }`
[INFO] [stdout] ef4a94fb2deecba05acd782f24b55b4fcb1d8935827052f2f5d66e2f445bc338