[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] testing AmadiMichael/interior_mutability against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmadiMichael%2Finterior_mutability" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-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-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AmadiMichael/interior_mutability on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "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" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94a4f1a117e974f7a2659ff95beca33cec2d051e5e89622e73fe0f4e3eb3dec1
[INFO] running `Command { std: "docker" "start" "-a" "94a4f1a117e974f7a2659ff95beca33cec2d051e5e89622e73fe0f4e3eb3dec1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94a4f1a117e974f7a2659ff95beca33cec2d051e5e89622e73fe0f4e3eb3dec1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94a4f1a117e974f7a2659ff95beca33cec2d051e5e89622e73fe0f4e3eb3dec1", kill_on_drop: false }`
[INFO] [stdout] 94a4f1a117e974f7a2659ff95beca33cec2d051e5e89622e73fe0f4e3eb3dec1
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 768e10edb7a86460357085d3d6f8a34e90b302c025956670f0ab35bf67ce1910
[INFO] running `Command { std: "docker" "start" "-a" "768e10edb7a86460357085d3d6f8a34e90b302c025956670f0ab35bf67ce1910", kill_on_drop: false }`
[INFO] [stderr]    Compiling internal_mutability v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/rc.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl <T> Rc<T> {
[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)]` 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<T>`
[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]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "768e10edb7a86460357085d3d6f8a34e90b302c025956670f0ab35bf67ce1910", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "768e10edb7a86460357085d3d6f8a34e90b302c025956670f0ab35bf67ce1910", kill_on_drop: false }`
[INFO] [stdout] 768e10edb7a86460357085d3d6f8a34e90b302c025956670f0ab35bf67ce1910
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bcb4ac34b2fc39b764b6607b64a49ebcd6709fa29a890991748aea704e0916a6
[INFO] running `Command { std: "docker" "start" "-a" "bcb4ac34b2fc39b764b6607b64a49ebcd6709fa29a890991748aea704e0916a6", kill_on_drop: false }`
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/rc.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl <T> Rc<T> {
[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)]` 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<T>`
[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]    Compiling 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)]` 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] warning: associated function `new` is never used
[INFO] [stdout]   --> src/rc.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl <T> Rc<T> {
[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)]` 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<T>`
[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]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "bcb4ac34b2fc39b764b6607b64a49ebcd6709fa29a890991748aea704e0916a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcb4ac34b2fc39b764b6607b64a49ebcd6709fa29a890991748aea704e0916a6", kill_on_drop: false }`
[INFO] [stdout] bcb4ac34b2fc39b764b6607b64a49ebcd6709fa29a890991748aea704e0916a6
[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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 976e144f1c6717353ae83b161a61f5f21a78866e7106920dc586f3bfe9cdbdc9
[INFO] running `Command { std: "docker" "start" "-a" "976e144f1c6717353ae83b161a61f5f21a78866e7106920dc586f3bfe9cdbdc9", kill_on_drop: false }`
[INFO] [stderr] warning: associated function `new` is never used
[INFO] [stderr]   --> src/rc.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | impl <T> Rc<T> {
[INFO] [stderr]    | -------------- associated function in this implementation
[INFO] [stderr] 18 |     fn new(v: T) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stderr]   --> src/rc.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |             drop(inner);
[INFO] [stderr]    |             ^^^^^-----^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  argument has type `&RcInner<T>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 52 -             drop(inner);
[INFO] [stderr] 52 +             let _ = inner;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `internal_mutability` (lib) generated 2 warnings
[INFO] [stderr] warning: unused import: `super::Cell`
[INFO] [stderr]   --> src/cell.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     use super::Cell;
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/rc.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `internal_mutability` (lib test) generated 4 warnings (2 duplicates) (run `cargo fix --lib -p internal_mutability --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/internal_mutability-8d6fb8c3bd7e892a)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test cell::test::bad ... ok
[INFO] [stdout] test rc::test::bad ... ok
[INFO] [stdout] test refcell::test::bad ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests internal_mutability
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "976e144f1c6717353ae83b161a61f5f21a78866e7106920dc586f3bfe9cdbdc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "976e144f1c6717353ae83b161a61f5f21a78866e7106920dc586f3bfe9cdbdc9", kill_on_drop: false }`
[INFO] [stdout] 976e144f1c6717353ae83b161a61f5f21a78866e7106920dc586f3bfe9cdbdc9
