[INFO] updating cached repository https://github.com/amty/magreader
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9517eb8dd8f39a6b7e90e63f38cb4d8a89237d62
[INFO] testing amty/magreader against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Famty%2Fmagreader" "work/builds/worker-0/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amty/magreader on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "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 work/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/amty/magreader already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 7def4fd2208970165727a7eecde2e58eac4bc108aa3a597423744d07e5f66654
[INFO] running `"docker" "start" "-a" "7def4fd2208970165727a7eecde2e58eac4bc108aa3a597423744d07e5f66654"`
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling syn v0.13.4
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling csv-core v0.1.4
[INFO] [stderr]    Compiling csv v1.0.0-beta.5
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]    Compiling serde_derive_internals v0.23.1
[INFO] [stderr]    Compiling markdown v0.2.0 (https://github.com/amty/markdown.rs#788aa512)
[INFO] [stderr]    Compiling serde_derive v1.0.43
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 10.85s
[INFO] running `"docker" "inspect" "7def4fd2208970165727a7eecde2e58eac4bc108aa3a597423744d07e5f66654"`
[INFO] running `"docker" "rm" "-f" "7def4fd2208970165727a7eecde2e58eac4bc108aa3a597423744d07e5f66654"`
[INFO] [stdout] 7def4fd2208970165727a7eecde2e58eac4bc108aa3a597423744d07e5f66654
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 728f0517d58ae86ee64b4952940c82ff3ef41a028a057c87ef854726cd952c1a
[INFO] running `"docker" "start" "-a" "728f0517d58ae86ee64b4952940c82ff3ef41a028a057c87ef854726cd952c1a"`
[INFO] [stderr]    Compiling 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]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "728f0517d58ae86ee64b4952940c82ff3ef41a028a057c87ef854726cd952c1a"`
[INFO] running `"docker" "rm" "-f" "728f0517d58ae86ee64b4952940c82ff3ef41a028a057c87ef854726cd952c1a"`
[INFO] [stdout] 728f0517d58ae86ee64b4952940c82ff3ef41a028a057c87ef854726cd952c1a
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-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" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] d3d981019329a82c487880fede92e5e847b93a06971bf676c13bab06c4866371
[INFO] running `"docker" "start" "-a" "d3d981019329a82c487880fede92e5e847b93a06971bf676c13bab06c4866371"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.28s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/export_mags-464395abc97ffc93
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d3d981019329a82c487880fede92e5e847b93a06971bf676c13bab06c4866371"`
[INFO] running `"docker" "rm" "-f" "d3d981019329a82c487880fede92e5e847b93a06971bf676c13bab06c4866371"`
[INFO] [stdout] d3d981019329a82c487880fede92e5e847b93a06971bf676c13bab06c4866371