[INFO] cloning repository https://github.com/amty/magreader
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amty/magreader" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famty%2Fmagreader"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famty%2Fmagreader'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9517eb8dd8f39a6b7e90e63f38cb4d8a89237d62
[INFO] checking amty/magreader against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famty%2Fmagreader" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amty/magreader on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/amty/magreader
[INFO] finished tweaking git repo https://github.com/amty/magreader
[INFO] tweaked toml for git repo https://github.com/amty/magreader written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/amty/magreader already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 85fed6032c71bf1a0f04b601eae1ec2c6c065d39d122ea9e9776052d9a367f35
[INFO] running `"docker" "start" "-a" "85fed6032c71bf1a0f04b601eae1ec2c6c065d39d122ea9e9776052d9a367f35"`
[INFO] [stderr]     Checking pipeline v0.5.0
[INFO] [stderr]     Checking csv-core v0.1.4
[INFO] [stderr]    Compiling syn v0.13.4
[INFO] [stderr]     Checking regex v0.2.10
[INFO] [stderr]     Checking csv v1.0.0-beta.5
[INFO] [stderr]     Checking markdown v0.2.0 (https://github.com/amty/markdown.rs#788aa512)
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling serde_derive v1.0.43
[INFO] [stderr]     Checking export-mags v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:70:37
[INFO] [stderr]    |
[INFO] [stderr] 70 |                 links = if let Some(mut ls) = links {
[INFO] [stderr]    |                                     ----^^
[INFO] [stderr]    |                                     |
[INFO] [stderr]    |                                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:93:37
[INFO] [stderr]    |
[INFO] [stderr] 93 |                 links = if let Some(mut ls) = links {
[INFO] [stderr]    |                                     ----^^
[INFO] [stderr]    |                                     |
[INFO] [stderr]    |                                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:127:24
[INFO] [stderr]     |
[INFO] [stderr] 127 |             let (text, mut ls) = if let Some(mut ls) = links {
[INFO] [stderr]     |                        ----^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:127:46
[INFO] [stderr]     |
[INFO] [stderr] 127 |             let (text, mut ls) = if let Some(mut ls) = links {
[INFO] [stderr]     |                                              ----^^
[INFO] [stderr]     |                                              |
[INFO] [stderr]     |                                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:70:37
[INFO] [stderr]    |
[INFO] [stderr] 70 |                 links = if let Some(mut ls) = links {
[INFO] [stderr]    |                                     ----^^
[INFO] [stderr]    |                                     |
[INFO] [stderr]    |                                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:93:37
[INFO] [stderr]    |
[INFO] [stderr] 93 |                 links = if let Some(mut ls) = links {
[INFO] [stderr]    |                                     ----^^
[INFO] [stderr]    |                                     |
[INFO] [stderr]    |                                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:127:24
[INFO] [stderr]     |
[INFO] [stderr] 127 |             let (text, mut ls) = if let Some(mut ls) = links {
[INFO] [stderr]     |                        ----^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:127:46
[INFO] [stderr]     |
[INFO] [stderr] 127 |             let (text, mut ls) = if let Some(mut ls) = links {
[INFO] [stderr]     |                                              ----^^
[INFO] [stderr]     |                                              |
[INFO] [stderr]     |                                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.54s
[INFO] running `"docker" "inspect" "85fed6032c71bf1a0f04b601eae1ec2c6c065d39d122ea9e9776052d9a367f35"`
[INFO] running `"docker" "rm" "-f" "85fed6032c71bf1a0f04b601eae1ec2c6c065d39d122ea9e9776052d9a367f35"`
[INFO] [stdout] 85fed6032c71bf1a0f04b601eae1ec2c6c065d39d122ea9e9776052d9a367f35