[INFO] updating cached repository amty/magreader
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/amty/magreader
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/amty/magreader" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/amty/magreader"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/amty/magreader'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/amty/magreader" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/amty/magreader"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/amty/magreader'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9517eb8dd8f39a6b7e90e63f38cb4d8a89237d62
[INFO] sha for GitHub repo amty/magreader: 9517eb8dd8f39a6b7e90e63f38cb4d8a89237d62
[INFO] validating manifest of amty/magreader on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of amty/magreader on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing amty/magreader
[INFO] finished frobbing amty/magreader
[INFO] frobbed toml for amty/magreader written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/amty/magreader/Cargo.toml
[INFO] started frobbing amty/magreader
[INFO] finished frobbing amty/magreader
[INFO] frobbed toml for amty/magreader written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/amty/magreader/Cargo.toml
[INFO] crate amty/magreader already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking amty/magreader against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-7/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/amty/magreader:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] e08eea8ac6a86bdddac047f510693a3a07d4a8622049d19b7b2edd162040c37b
[INFO] running `"docker" "start" "-a" "e08eea8ac6a86bdddac047f510693a3a07d4a8622049d19b7b2edd162040c37b"`
[INFO] [stderr]     Checking csv-core v0.1.4
[INFO] [stderr]     Checking regex v0.2.10
[INFO] [stderr]    Compiling serde_derive v1.0.43
[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]     Checking export-mags v0.1.0 (/opt/crater/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 12.49s
[INFO] running `"docker" "inspect" "e08eea8ac6a86bdddac047f510693a3a07d4a8622049d19b7b2edd162040c37b"`
[INFO] running `"docker" "rm" "-f" "e08eea8ac6a86bdddac047f510693a3a07d4a8622049d19b7b2edd162040c37b"`
[INFO] [stdout] e08eea8ac6a86bdddac047f510693a3a07d4a8622049d19b7b2edd162040c37b