[INFO] cloning repository https://github.com/xhook/rustagrad [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xhook/rustagrad" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxhook%2Frustagrad", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxhook%2Frustagrad'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 95578ed59eea5922ca61c89f4d98f0e1c5190534 [INFO] testing xhook/rustagrad against try#7af779037716ae4125ceabb429791b4cf5dd0a43 for pr-136932 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxhook%2Frustagrad" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/xhook/rustagrad on toolchain 7af779037716ae4125ceabb429791b4cf5dd0a43 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/xhook/rustagrad [INFO] finished tweaking git repo https://github.com/xhook/rustagrad [INFO] tweaked toml for git repo https://github.com/xhook/rustagrad written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/xhook/rustagrad 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" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded append-only-vec v0.1.2 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] effd91fecd2c35d0a9311df9bedf08a701c54bdaa386e8a030b6f086f4913f12 [INFO] running `Command { std: "docker" "start" "-a" "effd91fecd2c35d0a9311df9bedf08a701c54bdaa386e8a030b6f086f4913f12", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "effd91fecd2c35d0a9311df9bedf08a701c54bdaa386e8a030b6f086f4913f12", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "effd91fecd2c35d0a9311df9bedf08a701c54bdaa386e8a030b6f086f4913f12", kill_on_drop: false }` [INFO] [stdout] effd91fecd2c35d0a9311df9bedf08a701c54bdaa386e8a030b6f086f4913f12 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+7af779037716ae4125ceabb429791b4cf5dd0a43" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0eb47f041cdc7345b805a76d305a16968654b12e223dee582739cc774b0c417c [INFO] running `Command { std: "docker" "start" "-a" "0eb47f041cdc7345b805a76d305a16968654b12e223dee582739cc774b0c417c", kill_on_drop: false }` [INFO] [stderr] Compiling stable_deref_trait v1.2.0 [INFO] [stderr] Compiling append-only-vec v0.1.2 [INFO] [stderr] Compiling elsa v1.7.0 [INFO] [stderr] Compiling rustagrad v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `HashMap` [INFO] [stdout] --> src/grad_rc.rs:2:24 [INFO] [stdout] | [INFO] [stdout] 2 | use std::collections::{HashMap, HashSet}; [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `append_only_vec::AppendOnlyVec` [INFO] [stdout] --> src/grad_rc.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use append_only_vec::AppendOnlyVec; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `elsa::FrozenMap` [INFO] [stdout] --> src/grad_rc.rs:6:5 [INFO] [stdout] | [INFO] [stdout] 6 | use elsa::FrozenMap; [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/grad_rc.rs:58:25 [INFO] [stdout] | [INFO] [stdout] 58 | let mut left = left_rc.borrow_mut(); [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: variable does not need to be mutable [INFO] [stdout] --> src/grad_rc.rs:59:25 [INFO] [stdout] | [INFO] [stdout] 59 | let mut right = right_rc.borrow_mut(); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0594]: cannot assign to data in an `Rc` [INFO] [stdout] --> src/grad_rc.rs:60:21 [INFO] [stdout] | [INFO] [stdout] 60 | (**left).grad = right.grad + x.grad; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot assign [INFO] [stdout] | [INFO] [stdout] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `Rc` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0594]: cannot assign to data in an `Rc` [INFO] [stdout] --> src/grad_rc.rs:61:21 [INFO] [stdout] | [INFO] [stdout] 61 | (**right).grad = left.grad + x.grad; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot assign [INFO] [stdout] | [INFO] [stdout] = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `Rc` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0507]: cannot move out of a shared reference [INFO] [stdout] --> src/grad_rc.rs:75:27 [INFO] [stdout] | [INFO] [stdout] 75 | for &child in v.children.iter() { [INFO] [stdout] | ----- ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | data moved here [INFO] [stdout] | move occurs because `child` has type `Rc`, which does not implement the `Copy` trait [INFO] [stdout] | [INFO] [stdout] help: consider removing the borrow [INFO] [stdout] | [INFO] [stdout] 75 - for &child in v.children.iter() { [INFO] [stdout] 75 + for child in v.children.iter() { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `value` [INFO] [stdout] --> src/main.rs:21:13 [INFO] [stdout] | [INFO] [stdout] 21 | let value = Value { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_value` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v2` [INFO] [stdout] --> src/main.rs:32:13 [INFO] [stdout] | [INFO] [stdout] 32 | let v2 = s.value(20f32); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v3` [INFO] [stdout] --> src/main.rs:33:13 [INFO] [stdout] | [INFO] [stdout] 33 | let v3 = s.value(30f32); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v4` [INFO] [stdout] --> src/main.rs:34:13 [INFO] [stdout] | [INFO] [stdout] 34 | let v4 = s.value(40f32); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v4` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `v5` [INFO] [stdout] --> src/main.rs:35:13 [INFO] [stdout] | [INFO] [stdout] 35 | let v5 = s.value(50f32); [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_v5` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0507, E0594. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0507`. [INFO] [stdout] [INFO] [stderr] error: could not compile `rustagrad` (bin "rustagrad") due to 3 previous errors; 10 warnings emitted [INFO] running `Command { std: "docker" "inspect" "0eb47f041cdc7345b805a76d305a16968654b12e223dee582739cc774b0c417c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0eb47f041cdc7345b805a76d305a16968654b12e223dee582739cc774b0c417c", kill_on_drop: false }` [INFO] [stdout] 0eb47f041cdc7345b805a76d305a16968654b12e223dee582739cc774b0c417c