[INFO] fetching crate x-923 0.1.2...
[INFO] checking x-923-0.1.2 against master#af3c6e733a40e671550e0f0f5aeecaa13772ba56 for pr-74989
[INFO] extracting crate x-923 0.1.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate x-923 0.1.2 on toolchain af3c6e733a40e671550e0f0f5aeecaa13772ba56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate x-923 0.1.2
[INFO] finished tweaking crates.io crate x-923 0.1.2
[INFO] tweaked toml for crates.io crate x-923 0.1.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 399630e4c8d3fab0877e8ab35aac6499e145fc61631d97f9ff4f05ee5d5fe320
[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" "399630e4c8d3fab0877e8ab35aac6499e145fc61631d97f9ff4f05ee5d5fe320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "399630e4c8d3fab0877e8ab35aac6499e145fc61631d97f9ff4f05ee5d5fe320", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "399630e4c8d3fab0877e8ab35aac6499e145fc61631d97f9ff4f05ee5d5fe320", kill_on_drop: false }`
[INFO] [stdout] 399630e4c8d3fab0877e8ab35aac6499e145fc61631d97f9ff4f05ee5d5fe320
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+af3c6e733a40e671550e0f0f5aeecaa13772ba56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e18e22e7eeac89e44e89b8afc2b7be16e45f2e68a0fb5e3a761d3ea34718740b
[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" "e18e22e7eeac89e44e89b8afc2b7be16e45f2e68a0fb5e3a761d3ea34718740b", kill_on_drop: false }`
[INFO] [stderr]     Checking x-923 v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:20:19
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn pad_buffer(mut buffer: &mut Vec<u8>, block_size: u8) {
[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]   --> src/lib.rs:31:22
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn un_pad_buffer(mut buffer: &mut Vec<u8>) {
[INFO] [stdout]    |                      ----^^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:20:19
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub fn pad_buffer(mut buffer: &mut Vec<u8>, block_size: u8) {
[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]   --> src/lib.rs:31:22
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn un_pad_buffer(mut buffer: &mut Vec<u8>) {
[INFO] [stdout]    |                      ----^^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "e18e22e7eeac89e44e89b8afc2b7be16e45f2e68a0fb5e3a761d3ea34718740b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e18e22e7eeac89e44e89b8afc2b7be16e45f2e68a0fb5e3a761d3ea34718740b", kill_on_drop: false }`
[INFO] [stdout] e18e22e7eeac89e44e89b8afc2b7be16e45f2e68a0fb5e3a761d3ea34718740b
