[INFO] cloning repository https://github.com/roseduan/rust-learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/roseduan/rust-learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froseduan%2Frust-learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froseduan%2Frust-learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d5246ac494de647b179c4542df742b2710d660fb
[INFO] checking roseduan/rust-learn against master#8365fcb2b840c95eeb0bc377af8bd498fad22245 for pr-145604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froseduan%2Frust-learn" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/roseduan/rust-learn
[INFO] finished tweaking git repo https://github.com/roseduan/rust-learn
[INFO] tweaked toml for git repo https://github.com/roseduan/rust-learn written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/roseduan/rust-learn on toolchain 8365fcb2b840c95eeb0bc377af8bd498fad22245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8365fcb2b840c95eeb0bc377af8bd498fad22245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/roseduan/rust-learn 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" "+8365fcb2b840c95eeb0bc377af8bd498fad22245" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8365fcb2b840c95eeb0bc377af8bd498fad22245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed68c2cf951d3f78c2af39508d02869b4713d7f544772cbb4b3a847e241693cd
[INFO] running `Command { std: "docker" "start" "-a" "ed68c2cf951d3f78c2af39508d02869b4713d7f544772cbb4b3a847e241693cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed68c2cf951d3f78c2af39508d02869b4713d7f544772cbb4b3a847e241693cd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed68c2cf951d3f78c2af39508d02869b4713d7f544772cbb4b3a847e241693cd", kill_on_drop: false }`
[INFO] [stdout] ed68c2cf951d3f78c2af39508d02869b4713d7f544772cbb4b3a847e241693cd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8365fcb2b840c95eeb0bc377af8bd498fad22245" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 030c585c4b0f897489de74f4c1e56b079bac57524de011a4d7f1f78c1ac26af6
[INFO] running `Command { std: "docker" "start" "-a" "030c585c4b0f897489de74f4c1e56b079bac57524de011a4d7f1f78c1ac26af6", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Checking ownership v0.1.0 (/opt/rustwide/workdir/02-ownership)
[INFO] [stderr]     Checking lifecycle v0.1.0 (/opt/rustwide/workdir/03-lifecycle)
[INFO] [stderr]     Checking typesystem v0.1.0 (/opt/rustwide/workdir/05-typesystem)
[INFO] [stderr]     Checking memmange v0.1.0 (/opt/rustwide/workdir/04-memmange)
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]  --> 03-lifecycle/src/lifecycle_1.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let y = 100;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `demo1` is never used
[INFO] [stdout]  --> 03-lifecycle/src/lifecycle_1.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn demo1() {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `s1` should have an upper camel case name
[INFO] [stdout]  --> 04-memmange/src/mem_layout_1.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct s1 {
[INFO] [stdout]   |        ^^ help: convert the identifier to upper camel case (notice the capitalization): `S1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `s2` should have an upper camel case name
[INFO] [stdout]   --> 04-memmange/src/mem_layout_1.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct s2 {
[INFO] [stdout]    |        ^^ help: convert the identifier to upper camel case (notice the capitalization): `S2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]  --> 03-lifecycle/src/lifecycle_1.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let y = 100;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `demo1` is never used
[INFO] [stdout]  --> 03-lifecycle/src/lifecycle_1.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn demo1() {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a`, `b`, and `c` are never read
[INFO] [stdout]  --> 04-memmange/src/mem_layout_1.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct s1 {
[INFO] [stdout]   |        -- fields in this struct
[INFO] [stdout] 5 |     a: u8,
[INFO] [stdout]   |     ^
[INFO] [stdout] 6 |     b: u16,
[INFO] [stdout]   |     ^
[INFO] [stdout] 7 |     c: u8,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a`, `c`, and `b` are never read
[INFO] [stdout]   --> 04-memmange/src/mem_layout_1.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct s2 {
[INFO] [stdout]    |        -- fields in this struct
[INFO] [stdout] 11 |     a: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 12 |     c: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 13 |     b: u16,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `s1` should have an upper camel case name
[INFO] [stdout]  --> 04-memmange/src/mem_layout_1.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct s1 {
[INFO] [stdout]   |        ^^ help: convert the identifier to upper camel case (notice the capitalization): `S1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `s2` should have an upper camel case name
[INFO] [stdout]   --> 04-memmange/src/mem_layout_1.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct s2 {
[INFO] [stdout]    |        ^^ help: convert the identifier to upper camel case (notice the capitalization): `S2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a`, `b`, and `c` are never read
[INFO] [stdout]  --> 04-memmange/src/mem_layout_1.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct s1 {
[INFO] [stdout]   |        -- fields in this struct
[INFO] [stdout] 5 |     a: u8,
[INFO] [stdout]   |     ^
[INFO] [stdout] 6 |     b: u16,
[INFO] [stdout]   |     ^
[INFO] [stdout] 7 |     c: u8,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `a`, `c`, and `b` are never read
[INFO] [stdout]   --> 04-memmange/src/mem_layout_1.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct s2 {
[INFO] [stdout]    |        -- fields in this struct
[INFO] [stdout] 11 |     a: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 12 |     c: u8,
[INFO] [stdout]    |     ^
[INFO] [stdout] 13 |     b: u16,
[INFO] [stdout]    |     ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.19s
[INFO] running `Command { std: "docker" "inspect" "030c585c4b0f897489de74f4c1e56b079bac57524de011a4d7f1f78c1ac26af6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "030c585c4b0f897489de74f4c1e56b079bac57524de011a4d7f1f78c1ac26af6", kill_on_drop: false }`
[INFO] [stdout] 030c585c4b0f897489de74f4c1e56b079bac57524de011a4d7f1f78c1ac26af6