[INFO] cloning repository https://github.com/brianjiang2200/grade_tracker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brianjiang2200/grade_tracker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianjiang2200%2Fgrade_tracker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianjiang2200%2Fgrade_tracker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7add867383501a4a8f1bd572c551973c1702e09b
[INFO] testing brianjiang2200/grade_tracker against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianjiang2200%2Fgrade_tracker" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brianjiang2200/grade_tracker on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/brianjiang2200/grade_tracker
[INFO] finished tweaking git repo https://github.com/brianjiang2200/grade_tracker
[INFO] tweaked toml for git repo https://github.com/brianjiang2200/grade_tracker written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/brianjiang2200/grade_tracker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded json v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d30cbbd4e21bbf5cf05e4bb359433cbb97492dde789183764d9e3734409685c9
[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" "d30cbbd4e21bbf5cf05e4bb359433cbb97492dde789183764d9e3734409685c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d30cbbd4e21bbf5cf05e4bb359433cbb97492dde789183764d9e3734409685c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d30cbbd4e21bbf5cf05e4bb359433cbb97492dde789183764d9e3734409685c9", kill_on_drop: false }`
[INFO] [stdout] d30cbbd4e21bbf5cf05e4bb359433cbb97492dde789183764d9e3734409685c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", 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] 436fce306b9664674c4a3eec4ff0627d17b2583a3d0c0868e821c8643e7c8460
[INFO] running `Command { std: "docker" "start" "-a" "436fce306b9664674c4a3eec4ff0627d17b2583a3d0c0868e821c8643e7c8460", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling json v0.12.0
[INFO] [stderr]    Compiling serde_derive v1.0.103
[INFO] [stderr]    Compiling serde v1.0.103
[INFO] [stderr]    Compiling serde_json v1.0.44
[INFO] [stderr]    Compiling grade_tracker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/courses.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 | use serde::{Serialize, Deserialize}; 
[INFO] [stdout]    |             ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Summative`
[INFO] [stdout]   --> src/courses.rs:23:31
[INFO] [stdout]    |
[INFO] [stdout] 23 | use crate::jsondata::{Course, Summative}; 
[INFO] [stdout]    |                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/summative.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/summative.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 | use serde::{Serialize, Deserialize}; 
[INFO] [stdout]    |             ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/courses.rs:41:62
[INFO] [stdout]    |
[INFO] [stdout] 41 |             Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/courses.rs:54:65
[INFO] [stdout]    |
[INFO] [stdout] 54 |             Err(why) => panic!("Couldn't write to {}: {}.", display, why.description()), 
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/summative.rs:91:82
[INFO] [stdout]    |
[INFO] [stdout] 91 |                 Err(why) => panic!("Could not write summative information to file...{}", why.description()), 
[INFO] [stdout]    |                                                                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/summative.rs:175:83
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     Err(why) => panic!("Could not write summative information to file...{}", why.description()),
[INFO] [stdout]     |                                                                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/summative.rs:258:83
[INFO] [stdout]     |
[INFO] [stdout] 258 |                     Err(why) => panic!("Could not write summative information to file...{}", why.description()),
[INFO] [stdout]     |                                                                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]    --> src/summative.rs:126:7
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let mut index = 0; 
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]    --> src/summative.rs:214:7
[INFO] [stdout]     |
[INFO] [stdout] 214 |         let mut index = 0; 
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]    --> src/summative.rs:350:7
[INFO] [stdout]     |
[INFO] [stdout] 350 |         let mut index = 0; 
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.31s
[INFO] running `Command { std: "docker" "inspect" "436fce306b9664674c4a3eec4ff0627d17b2583a3d0c0868e821c8643e7c8460", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "436fce306b9664674c4a3eec4ff0627d17b2583a3d0c0868e821c8643e7c8460", kill_on_drop: false }`
[INFO] [stdout] 436fce306b9664674c4a3eec4ff0627d17b2583a3d0c0868e821c8643e7c8460
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e61690a6a00f37af9ff0f87673a2c3f1ae58350b27816e062f36bce9e7aa6a5d
[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" "e61690a6a00f37af9ff0f87673a2c3f1ae58350b27816e062f36bce9e7aa6a5d", kill_on_drop: false }`
[INFO] [stderr]    Compiling grade_tracker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/courses.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 | use serde::{Serialize, Deserialize}; 
[INFO] [stdout]    |             ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Summative`
[INFO] [stdout]   --> src/courses.rs:23:31
[INFO] [stdout]    |
[INFO] [stdout] 23 | use crate::jsondata::{Course, Summative}; 
[INFO] [stdout]    |                               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]   --> src/summative.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::fs::File;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stdout]   --> src/summative.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 | use serde::{Serialize, Deserialize}; 
[INFO] [stdout]    |             ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/courses.rs:41:62
[INFO] [stdout]    |
[INFO] [stdout] 41 |             Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stdout]    |                                                                       ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/courses.rs:54:65
[INFO] [stdout]    |
[INFO] [stdout] 54 |             Err(why) => panic!("Couldn't write to {}: {}.", display, why.description()), 
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/summative.rs:91:82
[INFO] [stdout]    |
[INFO] [stdout] 91 |                 Err(why) => panic!("Could not write summative information to file...{}", why.description()), 
[INFO] [stdout]    |                                                                                              ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/summative.rs:175:83
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     Err(why) => panic!("Could not write summative information to file...{}", why.description()),
[INFO] [stdout]     |                                                                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/summative.rs:258:83
[INFO] [stdout]     |
[INFO] [stdout] 258 |                     Err(why) => panic!("Could not write summative information to file...{}", why.description()),
[INFO] [stdout]     |                                                                                                  ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]    --> src/summative.rs:126:7
[INFO] [stdout]     |
[INFO] [stdout] 126 |         let mut index = 0; 
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]    --> src/summative.rs:214:7
[INFO] [stdout]     |
[INFO] [stdout] 214 |         let mut index = 0; 
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]    --> src/summative.rs:350:7
[INFO] [stdout]     |
[INFO] [stdout] 350 |         let mut index = 0; 
[INFO] [stdout]     |             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.49s
[INFO] running `Command { std: "docker" "inspect" "e61690a6a00f37af9ff0f87673a2c3f1ae58350b27816e062f36bce9e7aa6a5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e61690a6a00f37af9ff0f87673a2c3f1ae58350b27816e062f36bce9e7aa6a5d", kill_on_drop: false }`
[INFO] [stdout] e61690a6a00f37af9ff0f87673a2c3f1ae58350b27816e062f36bce9e7aa6a5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=warn" "-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" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 192a1baa7ffbfe7ad7ceced36717854c61f6c0f48c0eb34876ee68cc3a7ebff6
[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" "192a1baa7ffbfe7ad7ceced36717854c61f6c0f48c0eb34876ee68cc3a7ebff6", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stderr]   --> src/courses.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 | use serde::{Serialize, Deserialize}; 
[INFO] [stderr]    |             ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Summative`
[INFO] [stderr]   --> src/courses.rs:23:31
[INFO] [stderr]    |
[INFO] [stderr] 23 | use crate::jsondata::{Course, Summative}; 
[INFO] [stderr]    |                               ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs::File`
[INFO] [stderr]   --> src/summative.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | use std::fs::File;
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Deserialize`, `Serialize`
[INFO] [stderr]   --> src/summative.rs:21:13
[INFO] [stderr]    |
[INFO] [stderr] 21 | use serde::{Serialize, Deserialize}; 
[INFO] [stderr]    |             ^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/courses.rs:41:62
[INFO] [stderr]    |
[INFO] [stderr] 41 |             Err(why) => panic!("couldn't create {}: {}", display, why.description()),
[INFO] [stderr]    |                                                                       ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/courses.rs:54:65
[INFO] [stderr]    |
[INFO] [stderr] 54 |             Err(why) => panic!("Couldn't write to {}: {}.", display, why.description()), 
[INFO] [stderr]    |                                                                          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]   --> src/summative.rs:91:82
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 Err(why) => panic!("Could not write summative information to file...{}", why.description()), 
[INFO] [stderr]    |                                                                                              ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/summative.rs:175:83
[INFO] [stderr]     |
[INFO] [stderr] 175 |                     Err(why) => panic!("Could not write summative information to file...{}", why.description()),
[INFO] [stderr]     |                                                                                                  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stderr]    --> src/summative.rs:258:83
[INFO] [stderr]     |
[INFO] [stderr] 258 |                     Err(why) => panic!("Could not write summative information to file...{}", why.description()),
[INFO] [stderr]     |                                                                                                  ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `index` is never read
[INFO] [stderr]    --> src/summative.rs:126:7
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let mut index = 0; 
[INFO] [stderr]     |             ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `index` is never read
[INFO] [stderr]    --> src/summative.rs:214:7
[INFO] [stderr]     |
[INFO] [stderr] 214 |         let mut index = 0; 
[INFO] [stderr]     |             ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `index` is never read
[INFO] [stderr]    --> src/summative.rs:350:7
[INFO] [stderr]     |
[INFO] [stderr] 350 |         let mut index = 0; 
[INFO] [stderr]     |             ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: 12 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/grade_tracker-d5973e22f5d41020
[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 `Command { std: "docker" "inspect" "192a1baa7ffbfe7ad7ceced36717854c61f6c0f48c0eb34876ee68cc3a7ebff6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "192a1baa7ffbfe7ad7ceced36717854c61f6c0f48c0eb34876ee68cc3a7ebff6", kill_on_drop: false }`
[INFO] [stdout] 192a1baa7ffbfe7ad7ceced36717854c61f6c0f48c0eb34876ee68cc3a7ebff6
