[INFO] fetching crate vf-rs 0.3.15...
[INFO] checking vf-rs-0.3.15 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate vf-rs 0.3.15 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate vf-rs 0.3.15 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vf-rs 0.3.15
[INFO] finished tweaking crates.io crate vf-rs 0.3.15
[INFO] tweaked toml for crates.io crate vf-rs 0.3.15 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", 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] 2f3a5caa5a761379383ca1e1c893640fe6df47599085e5f0b3d761ed17e318e9
[INFO] running `Command { std: "docker" "start" "-a" "2f3a5caa5a761379383ca1e1c893640fe6df47599085e5f0b3d761ed17e318e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f3a5caa5a761379383ca1e1c893640fe6df47599085e5f0b3d761ed17e318e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f3a5caa5a761379383ca1e1c893640fe6df47599085e5f0b3d761ed17e318e9", kill_on_drop: false }`
[INFO] [stdout] 2f3a5caa5a761379383ca1e1c893640fe6df47599085e5f0b3d761ed17e318e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9fc6b5bccecbb9c293050346348d2976c5ada9cd47cd2594d98b6f24b6fff7b
[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" "c9fc6b5bccecbb9c293050346348d2976c5ada9cd47cd2594d98b6f24b6fff7b", kill_on_drop: false }`
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling rio_api v0.4.2
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling tinyvec v0.3.4
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling percent-encoding v2.1.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling rio_turtle v0.4.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling getset v0.1.1
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling derive_builder_core v0.9.0
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking rust_decimal v1.8.1
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking chrono v0.4.15
[INFO] [stderr]     Checking serde_json v1.0.57
[INFO] [stderr]    Compiling om2 v0.1.7
[INFO] [stderr]    Compiling vf-rs v0.3.15 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `chrono::prelude::*`
[INFO] [stdout]   --> src/lib.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     use chrono::prelude::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/vf-rs-acce3e3093ec4a4c/out/vf_gen.rs:1685:21
[INFO] [stdout]      |
[INFO] [stdout] 1685 |                 let mut builder = Self::builder();
[INFO] [stdout]      |                     ----^^^^^^^
[INFO] [stdout]      |                     |
[INFO] [stdout]      |                     help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/vf-rs-acce3e3093ec4a4c/out/vf_gen.rs:1685:21
[INFO] [stdout]      |
[INFO] [stdout] 1685 |                 let mut builder = Self::builder();
[INFO] [stdout]      |                     ----^^^^^^^
[INFO] [stdout]      |                     |
[INFO] [stdout]      |                     help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 44s
[INFO] running `Command { std: "docker" "inspect" "c9fc6b5bccecbb9c293050346348d2976c5ada9cd47cd2594d98b6f24b6fff7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9fc6b5bccecbb9c293050346348d2976c5ada9cd47cd2594d98b6f24b6fff7b", kill_on_drop: false }`
[INFO] [stdout] c9fc6b5bccecbb9c293050346348d2976c5ada9cd47cd2594d98b6f24b6fff7b