[INFO] cloning repository https://github.com/AmadiMichael/interior_mutability [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AmadiMichael/interior_mutability" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmadiMichael%2Finterior_mutability", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmadiMichael%2Finterior_mutability'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 5342a35f33ed51fb0f0e35edd9bb19b3a0b46604 [INFO] checking AmadiMichael/interior_mutability against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmadiMichael%2Finterior_mutability" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/AmadiMichael/interior_mutability [INFO] finished tweaking git repo https://github.com/AmadiMichael/interior_mutability [INFO] tweaked toml for git repo https://github.com/AmadiMichael/interior_mutability written to /workspace/builds/worker-3-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/AmadiMichael/interior_mutability on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/AmadiMichael/interior_mutability 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a73006c780c6b721195c07bf1f5eebe8a5914a5896bdaf2980681440b0859e4e [INFO] running `Command { std: "docker" "start" "-a" "a73006c780c6b721195c07bf1f5eebe8a5914a5896bdaf2980681440b0859e4e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a73006c780c6b721195c07bf1f5eebe8a5914a5896bdaf2980681440b0859e4e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a73006c780c6b721195c07bf1f5eebe8a5914a5896bdaf2980681440b0859e4e", kill_on_drop: false }` [INFO] [stdout] a73006c780c6b721195c07bf1f5eebe8a5914a5896bdaf2980681440b0859e4e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f4d6577effef52b246b54997dfa58805ced9797b4bb27b581f07a788faaf1969 [INFO] running `Command { std: "docker" "start" "-a" "f4d6577effef52b246b54997dfa58805ced9797b4bb27b581f07a788faaf1969", kill_on_drop: false }` [INFO] [stderr] Checking internal_mutability v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `super::Cell` [INFO] [stdout] --> src/cell.rs:33:9 [INFO] [stdout] | [INFO] [stdout] 33 | use super::Cell; [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> src/rc.rs:66:9 [INFO] [stdout] | [INFO] [stdout] 66 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: struct `Rc` is never constructed [INFO] [stdout] --> src/rc.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | pub struct Rc { [INFO] [stdout] | ^^ [INFO] [stdout] | [INFO] [stdout] = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it [INFO] [stdout] = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/rc.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Rc { [INFO] [stdout] | -------------- associated function in this implementation [INFO] [stdout] 18 | fn new(v: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: struct `Rc` is never constructed [INFO] [stdout] --> src/rc.rs:11:12 [INFO] [stdout] | [INFO] [stdout] 11 | pub struct Rc { [INFO] [stdout] | ^^ [INFO] [stdout] | [INFO] [stdout] = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it [INFO] [stdout] = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function `new` is never used [INFO] [stdout] --> src/rc.rs:18:8 [INFO] [stdout] | [INFO] [stdout] 17 | impl Rc { [INFO] [stdout] | -------------- associated function in this implementation [INFO] [stdout] 18 | fn new(v: T) -> Self { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/rc.rs:52:13 [INFO] [stdout] | [INFO] [stdout] 52 | drop(inner); [INFO] [stdout] | ^^^^^-----^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&RcInner` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 52 - drop(inner); [INFO] [stdout] 52 + let _ = inner; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing [INFO] [stdout] --> src/rc.rs:52:13 [INFO] [stdout] | [INFO] [stdout] 52 | drop(inner); [INFO] [stdout] | ^^^^^-----^ [INFO] [stdout] | | [INFO] [stdout] | argument has type `&RcInner` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dropping_references)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the expression or result [INFO] [stdout] | [INFO] [stdout] 52 - drop(inner); [INFO] [stdout] 52 + let _ = inner; [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `internal_mutability` (lib) due to 1 previous error; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `internal_mutability` (lib test) due to 1 previous error; 4 warnings emitted [INFO] running `Command { std: "docker" "inspect" "f4d6577effef52b246b54997dfa58805ced9797b4bb27b581f07a788faaf1969", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f4d6577effef52b246b54997dfa58805ced9797b4bb27b581f07a788faaf1969", kill_on_drop: false }` [INFO] [stdout] f4d6577effef52b246b54997dfa58805ced9797b4bb27b581f07a788faaf1969