[INFO] fetching crate double_linkedlist 0.1.2...
[INFO] checking double_linkedlist-0.1.2 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate double_linkedlist 0.1.2 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate double_linkedlist 0.1.2
[INFO] finished tweaking crates.io crate double_linkedlist 0.1.2
[INFO] tweaked toml for crates.io crate double_linkedlist 0.1.2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate double_linkedlist 0.1.2 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a78c6ecfa1d5b3207191f856501525a61daa37142a1fbad6a5f796927b0e5c1e
[INFO] running `Command { std: "docker" "start" "-a" "a78c6ecfa1d5b3207191f856501525a61daa37142a1fbad6a5f796927b0e5c1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a78c6ecfa1d5b3207191f856501525a61daa37142a1fbad6a5f796927b0e5c1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a78c6ecfa1d5b3207191f856501525a61daa37142a1fbad6a5f796927b0e5c1e", kill_on_drop: false }`
[INFO] [stdout] a78c6ecfa1d5b3207191f856501525a61daa37142a1fbad6a5f796927b0e5c1e
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51ac2623fae27af1738b5876b3660c8f80139ee3229ec8a05fdf108597d7e921
[INFO] running `Command { std: "docker" "start" "-a" "51ac2623fae27af1738b5876b3660c8f80139ee3229ec8a05fdf108597d7e921", kill_on_drop: false }`
[INFO] [stderr]     Checking double_linkedlist v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type `Double_Node` should have an upper camel case name
[INFO] [stdout]  --> src/lib.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Double_Node {
[INFO] [stdout]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoubleNode`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Double_LinkedList` should have an upper camel case name
[INFO] [stdout]   --> src/lib.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Double_LinkedList {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoubleLinkedList`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Double_LinkedList_Iterator` should have an upper camel case name
[INFO] [stdout]   --> src/lib.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub struct Double_LinkedList_Iterator {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoubleLinkedListIterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Double_Node` should have an upper camel case name
[INFO] [stdout]  --> src/lib.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Double_Node {
[INFO] [stdout]   |        ^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoubleNode`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Double_LinkedList` should have an upper camel case name
[INFO] [stdout]   --> src/lib.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub struct Double_LinkedList {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoubleLinkedList`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Double_LinkedList_Iterator` should have an upper camel case name
[INFO] [stdout]   --> src/lib.rs:83:12
[INFO] [stdout]    |
[INFO] [stdout] 83 | pub struct Double_LinkedList_Iterator {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `DoubleLinkedListIterator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `result` is never read
[INFO] [stdout]   --> src/lib.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let mut result = None;
[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: `test_double_node`
[INFO] [stdout]    --> src/lib.rs:120:17
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let mut test_double_node = Double_Node::new(10);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_test_double_node`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:120:13
[INFO] [stdout]     |
[INFO] [stdout] 120 |         let mut test_double_node = Double_Node::new(10);
[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: value assigned to `result` is never read
[INFO] [stdout]   --> src/lib.rs:55:17
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let mut result = None;
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "51ac2623fae27af1738b5876b3660c8f80139ee3229ec8a05fdf108597d7e921", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51ac2623fae27af1738b5876b3660c8f80139ee3229ec8a05fdf108597d7e921", kill_on_drop: false }`
[INFO] [stdout] 51ac2623fae27af1738b5876b3660c8f80139ee3229ec8a05fdf108597d7e921