[INFO] cloning repository https://github.com/emanguy/rust-presentation-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/emanguy/rust-presentation-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanguy%2Frust-presentation-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanguy%2Frust-presentation-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a85d1bd042987deaac3ae446f2ab4fe6f4702d8e
[INFO] checking emanguy/rust-presentation-code against try#3ec2a775459d36c7d90654e47c56ff7bb0d542ab for pr-139087
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Femanguy%2Frust-presentation-code" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emanguy/rust-presentation-code on toolchain 3ec2a775459d36c7d90654e47c56ff7bb0d542ab
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3ec2a775459d36c7d90654e47c56ff7bb0d542ab" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/emanguy/rust-presentation-code
[INFO] finished tweaking git repo https://github.com/emanguy/rust-presentation-code
[INFO] tweaked toml for git repo https://github.com/emanguy/rust-presentation-code written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/emanguy/rust-presentation-code 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" "+3ec2a775459d36c7d90654e47c56ff7bb0d542ab" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+3ec2a775459d36c7d90654e47c56ff7bb0d542ab" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 861cdb9fcc69daa03506ccc5bda2dfb78e9c9ecb346dca6ce2f97ad673edc1a4
[INFO] running `Command { std: "docker" "start" "-a" "861cdb9fcc69daa03506ccc5bda2dfb78e9c9ecb346dca6ce2f97ad673edc1a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "861cdb9fcc69daa03506ccc5bda2dfb78e9c9ecb346dca6ce2f97ad673edc1a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "861cdb9fcc69daa03506ccc5bda2dfb78e9c9ecb346dca6ce2f97ad673edc1a4", kill_on_drop: false }`
[INFO] [stdout] 861cdb9fcc69daa03506ccc5bda2dfb78e9c9ecb346dca6ce2f97ad673edc1a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:4b26683ee3c49f365255c425c23003cbf4366de097804722c29c5bbbee3624d2" "/opt/rustwide/cargo-home/bin/cargo" "+3ec2a775459d36c7d90654e47c56ff7bb0d542ab" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 895eb2c379d49f2fe7214b6c133aa86c7a2c533500a3bfa6d005dc77b7f34b65
[INFO] running `Command { std: "docker" "start" "-a" "895eb2c379d49f2fe7214b6c133aa86c7a2c533500a3bfa6d005dc77b7f34b65", kill_on_drop: false }`
[INFO] [stderr]     Checking presentation-code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `third_num`
[INFO] [stdout]   --> examples/p02_variables_mutability.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let third_num: f32 = 20.5;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_third_num`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `result` is assigned to, but never used
[INFO] [stdout]   --> examples/p02_variables_mutability.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let mut result = 0;
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_result` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> examples/p02_variables_mutability.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     result = first_num + second_num as i32; // There are no implicit casts either!
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `acquired_value`
[INFO] [stdout]  --> examples/p07_option_result.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let acquired_value = match value_exists {
[INFO] [stdout]   |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_acquired_value`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `easier_value_get`
[INFO] [stdout]   --> examples/p07_option_result.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let easier_value_get = value_doesnt_exist.unwrap_or(0);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_easier_value_get`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> examples/p07_option_result.rs:18:17
[INFO] [stdout]    |
[INFO] [stdout] 18 |     if let Some(value) = value_doesnt_exist {
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> examples/p07_option_result.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let Some(value) = value_exists else {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Red`, `Blue`, and `RGBA` are never constructed
[INFO] [stdout]   --> examples/p06_pattern_matching_enums.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | enum Color {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 42 |     Red,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 43 |     Green,
[INFO] [stdout] 44 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 45 |     RGB(i32, i32, i32), // This enum value holds a tuple of 3 numbers
[INFO] [stdout] 46 |     RGBA { // This enum value holds values like a struct
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `ViolatedConstraint` is never constructed
[INFO] [stdout]   --> examples/p07_option_result.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | enum DbError {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 45 |     ConnectionProblem,
[INFO] [stdout] 46 |     ViolatedConstraint,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `database_lookup_v1` is never used
[INFO] [stdout]   --> examples/p07_option_result.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn database_lookup_v1() -> Result<i32, DbError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ClonablePoint` is never constructed
[INFO] [stdout]   --> examples/p04_traits.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 | struct ClonablePoint {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "895eb2c379d49f2fe7214b6c133aa86c7a2c533500a3bfa6d005dc77b7f34b65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "895eb2c379d49f2fe7214b6c133aa86c7a2c533500a3bfa6d005dc77b7f34b65", kill_on_drop: false }`
[INFO] [stdout] 895eb2c379d49f2fe7214b6c133aa86c7a2c533500a3bfa6d005dc77b7f34b65