[INFO] cloning repository https://github.com/noorulislam770/rust-memory-management
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/noorulislam770/rust-memory-management" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoorulislam770%2Frust-memory-management", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoorulislam770%2Frust-memory-management'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c70e0dc4e6c67d7e74a2c5d9321154bbda44814b
[INFO] testing noorulislam770/rust-memory-management against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnoorulislam770%2Frust-memory-management" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/noorulislam770/rust-memory-management
[INFO] finished tweaking git repo https://github.com/noorulislam770/rust-memory-management
[INFO] tweaked toml for git repo https://github.com/noorulislam770/rust-memory-management written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/noorulislam770/rust-memory-management on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/noorulislam770/rust-memory-management already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 29d13a176899ccc0bc3c93b5d5df3994fb21abfa19696d3b023a117f58f6d839
[INFO] running `Command { std: "docker" "start" "-a" "29d13a176899ccc0bc3c93b5d5df3994fb21abfa19696d3b023a117f58f6d839", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "29d13a176899ccc0bc3c93b5d5df3994fb21abfa19696d3b023a117f58f6d839", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29d13a176899ccc0bc3c93b5d5df3994fb21abfa19696d3b023a117f58f6d839", kill_on_drop: false }`
[INFO] [stdout] 29d13a176899ccc0bc3c93b5d5df3994fb21abfa19696d3b023a117f58f6d839
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 643f74ea9f583dcbd1718d1c7ebaaaba371f66d9de22f11a6de8fb2a190d9b13
[INFO] running `Command { std: "docker" "start" "-a" "643f74ea9f583dcbd1718d1c7ebaaaba371f66d9de22f11a6de8fb2a190d9b13", kill_on_drop: false }`
[INFO] [stderr]    Compiling memory_management v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `count` is never read
[INFO] [stdout]  --> src/bin/string-demo.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct LineItem {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 4 |     count : i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]  --> src/bin/type_annotations-demo.rs:7:15
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn print_many(msg : &str, count : i32) {}
[INFO] [stdout]   |               ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]  --> src/bin/type_annotations-demo.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn print_many(msg : &str, count : i32) {}
[INFO] [stdout]   |                           ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]   --> src/bin/type_annotations-demo.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let num : i32 = 23;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin/type_annotations-demo.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let a: char  = 'A';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left_click`
[INFO] [stdout]   --> src/bin/type_annotations-demo.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let left_click : Mouse = Mouse::LeftClick;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_left_click`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `RightClick` and `MiddleClick` are never constructed
[INFO] [stdout]  --> src/bin/type_annotations-demo.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Mouse {
[INFO] [stdout]   |      ----- variants in this enum
[INFO] [stdout] 2 |     LeftClick, 
[INFO] [stdout] 3 |     RightClick,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |     MiddleClick,
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_many` is never used
[INFO] [stdout]  --> src/bin/type_annotations-demo.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn print_many(msg : &str, count : i32) {}
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut dull = Light::Dull;
[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: variant `Bright` is never constructed
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Light {
[INFO] [stdout]   |      ----- variant in this enum
[INFO] [stdout] 2 |     Bright,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Mouse` is never used
[INFO] [stdout]  --> src/bin/enum-revisited.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Mouse {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PromoDiscount` is never used
[INFO] [stdout]  --> src/bin/enum-revisited.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum PromoDiscount {
[INFO] [stdout]   |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Discount` is never used
[INFO] [stdout]   --> src/bin/enum-revisited.rs:14:6
[INFO] [stdout]    |
[INFO] [stdout] 14 | enum Discount {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mark`
[INFO] [stdout]   --> src/bin/option-demo.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let mark = Customer {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_mark`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `email` is never read
[INFO] [stdout]  --> src/bin/option-demo.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Customer { 
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 2 |     age : Option<i32>,
[INFO] [stdout] 3 |     email : String, 
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `percent`
[INFO] [stdout]   --> src/bin/advanced-match-demo.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let percent = Discount::Percent(50);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_percent`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/bin/advanced-match-demo.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         other => ()
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/advanced-match-demo.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     Percent(i32),
[INFO] [stdout]   |     ------- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 2 -     Percent(i32),
[INFO] [stdout] 2 +     Percent(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `two`
[INFO] [stdout]   --> src/bin/vector-demo.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let two = my_numbers[1];
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_two`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `standard_lib`
[INFO] [stdout]  --> src/bin/standard-lib.rs:1:2
[INFO] [stdout]   |
[INFO] [stdout] 1 |
[INFO] [stdout]   | ^ consider adding a `main` function to `src/bin/standard-lib.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Supervisor` and `Worker` are never constructed
[INFO] [stdout]  --> src/bin/derive-demo.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum Position {
[INFO] [stdout]   |      -------- variants in this enum
[INFO] [stdout] 6 |     Manager,
[INFO] [stdout] 7 |     Supervisor,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 8 |     Worker,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Position` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `position` and `work_hours` are never read
[INFO] [stdout]   --> src/bin/derive-demo.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Employee {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 13 |     position : Position, 
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 14 |     work_hours : i64, 
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Employee` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memory_management` (bin "standard-lib") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "643f74ea9f583dcbd1718d1c7ebaaaba371f66d9de22f11a6de8fb2a190d9b13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "643f74ea9f583dcbd1718d1c7ebaaaba371f66d9de22f11a6de8fb2a190d9b13", kill_on_drop: false }`
[INFO] [stdout] 643f74ea9f583dcbd1718d1c7ebaaaba371f66d9de22f11a6de8fb2a190d9b13