[INFO] updating cached repository https://github.com/shanemikel/rust-hello [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] d473b3db08dbfe0ed83f428a13e337b242c04ce5 [INFO] testing shanemikel/rust-hello against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshanemikel%2Frust-hello" "/workspace/builds/worker-13/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/shanemikel/rust-hello on toolchain 41997647ba6a77908f6ef64401414feb00bccf16 [INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/shanemikel/rust-hello [INFO] finished tweaking git repo https://github.com/shanemikel/rust-hello [INFO] tweaked toml for git repo https://github.com/shanemikel/rust-hello written to /workspace/builds/worker-13/source/Cargo.toml [INFO] crate git repo https://github.com/shanemikel/rust-hello already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 92399d60aab4eee9d4d753a0ed599dd370681ecf41deb6c7f9349021f63cdc53 [INFO] running `"docker" "start" "-a" "92399d60aab4eee9d4d753a0ed599dd370681ecf41deb6c7f9349021f63cdc53"` [INFO] [stderr] Compiling rust-hello v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused import: `std::cell::RefCell` [INFO] [stderr] --> src/main.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | use std::cell::RefCell; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `Mutex` [INFO] [stderr] --> src/main.rs:9:26 [INFO] [stderr] | [INFO] [stderr] 9 | use std::sync::{Arc, Mutex, RwLock}; [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `data` [INFO] [stderr] --> src/main.rs:25:17 [INFO] [stderr] | [INFO] [stderr] 25 | let data = data.read().unwrap(); [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Cons` [INFO] [stderr] --> src/list.rs:4:5 [INFO] [stderr] | [INFO] [stderr] 4 | Cons(T, Box>), [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Nil` [INFO] [stderr] --> src/list.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | Nil, [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/list.rs:9:5 [INFO] [stderr] | [INFO] [stderr] 9 | pub fn new() -> List { List::Nil } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `cons` [INFO] [stderr] --> src/list.rs:11:5 [INFO] [stderr] | [INFO] [stderr] 11 | pub fn cons(self, x: T) -> List { List::Cons(x, Box::new(self)) } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `head` [INFO] [stderr] --> src/list.rs:13:5 [INFO] [stderr] | [INFO] [stderr] 13 | pub fn head(self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `tail` [INFO] [stderr] --> src/list.rs:20:5 [INFO] [stderr] | [INFO] [stderr] 20 | pub fn tail(&self) -> Option<&List> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `head_ref` [INFO] [stderr] --> src/list.rs:29:5 [INFO] [stderr] | [INFO] [stderr] 29 | pub fn head_ref(&self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: constant item is never used: `N` [INFO] [stderr] --> src/main.rs:13:5 [INFO] [stderr] | [INFO] [stderr] 13 | const N: usize = 10; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test_list` [INFO] [stderr] --> src/main.rs:39:4 [INFO] [stderr] | [INFO] [stderr] 39 | fn test_list() { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 12 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.59s [INFO] running `"docker" "inspect" "92399d60aab4eee9d4d753a0ed599dd370681ecf41deb6c7f9349021f63cdc53"` [INFO] running `"docker" "rm" "-f" "92399d60aab4eee9d4d753a0ed599dd370681ecf41deb6c7f9349021f63cdc53"` [INFO] [stdout] 92399d60aab4eee9d4d753a0ed599dd370681ecf41deb6c7f9349021f63cdc53 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 4859ca4a2c6eae6792cd5e49024af1ddc8c45703c3977e39230a2de2bdc97cb6 [INFO] running `"docker" "start" "-a" "4859ca4a2c6eae6792cd5e49024af1ddc8c45703c3977e39230a2de2bdc97cb6"` [INFO] [stderr] Compiling rust-hello v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused import: `std::cell::RefCell` [INFO] [stderr] --> src/main.rs:8:9 [INFO] [stderr] | [INFO] [stderr] 8 | use std::cell::RefCell; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `Mutex` [INFO] [stderr] --> src/main.rs:9:26 [INFO] [stderr] | [INFO] [stderr] 9 | use std::sync::{Arc, Mutex, RwLock}; [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `data` [INFO] [stderr] --> src/main.rs:25:17 [INFO] [stderr] | [INFO] [stderr] 25 | let data = data.read().unwrap(); [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Cons` [INFO] [stderr] --> src/list.rs:4:5 [INFO] [stderr] | [INFO] [stderr] 4 | Cons(T, Box>), [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Nil` [INFO] [stderr] --> src/list.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | Nil, [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/list.rs:9:5 [INFO] [stderr] | [INFO] [stderr] 9 | pub fn new() -> List { List::Nil } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `cons` [INFO] [stderr] --> src/list.rs:11:5 [INFO] [stderr] | [INFO] [stderr] 11 | pub fn cons(self, x: T) -> List { List::Cons(x, Box::new(self)) } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `head` [INFO] [stderr] --> src/list.rs:13:5 [INFO] [stderr] | [INFO] [stderr] 13 | pub fn head(self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `tail` [INFO] [stderr] --> src/list.rs:20:5 [INFO] [stderr] | [INFO] [stderr] 20 | pub fn tail(&self) -> Option<&List> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `head_ref` [INFO] [stderr] --> src/list.rs:29:5 [INFO] [stderr] | [INFO] [stderr] 29 | pub fn head_ref(&self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: constant item is never used: `N` [INFO] [stderr] --> src/main.rs:13:5 [INFO] [stderr] | [INFO] [stderr] 13 | const N: usize = 10; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test_list` [INFO] [stderr] --> src/main.rs:39:4 [INFO] [stderr] | [INFO] [stderr] 39 | fn test_list() { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 12 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 1.35s [INFO] running `"docker" "inspect" "4859ca4a2c6eae6792cd5e49024af1ddc8c45703c3977e39230a2de2bdc97cb6"` [INFO] running `"docker" "rm" "-f" "4859ca4a2c6eae6792cd5e49024af1ddc8c45703c3977e39230a2de2bdc97cb6"` [INFO] [stdout] 4859ca4a2c6eae6792cd5e49024af1ddc8c45703c3977e39230a2de2bdc97cb6 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] d20ee0f0d63dcca2f4bdf18b7b5175b54cbdece592bf52dfbf544a7f6d656a6f [INFO] running `"docker" "start" "-a" "d20ee0f0d63dcca2f4bdf18b7b5175b54cbdece592bf52dfbf544a7f6d656a6f"` [INFO] [stderr] warning: unused import: `std::cell::RefCell` [INFO] [stdout] [INFO] [stderr] --> src/main.rs:8:9 [INFO] [stdout] running 0 tests [INFO] [stderr] | [INFO] [stdout] [INFO] [stderr] 8 | use std::cell::RefCell; [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused import: `Mutex` [INFO] [stderr] --> src/main.rs:9:26 [INFO] [stderr] | [INFO] [stderr] 9 | use std::sync::{Arc, Mutex, RwLock}; [INFO] [stderr] | ^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `data` [INFO] [stderr] --> src/main.rs:25:17 [INFO] [stderr] | [INFO] [stderr] 25 | let data = data.read().unwrap(); [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_data` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Cons` [INFO] [stderr] --> src/list.rs:4:5 [INFO] [stderr] | [INFO] [stderr] 4 | Cons(T, Box>), [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variant is never constructed: `Nil` [INFO] [stderr] --> src/list.rs:5:5 [INFO] [stderr] | [INFO] [stderr] 5 | Nil, [INFO] [stderr] | ^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `new` [INFO] [stderr] --> src/list.rs:9:5 [INFO] [stderr] | [INFO] [stderr] 9 | pub fn new() -> List { List::Nil } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `cons` [INFO] [stderr] --> src/list.rs:11:5 [INFO] [stderr] | [INFO] [stderr] 11 | pub fn cons(self, x: T) -> List { List::Cons(x, Box::new(self)) } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `head` [INFO] [stderr] --> src/list.rs:13:5 [INFO] [stderr] | [INFO] [stderr] 13 | pub fn head(self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `tail` [INFO] [stderr] --> src/list.rs:20:5 [INFO] [stderr] | [INFO] [stderr] 20 | pub fn tail(&self) -> Option<&List> { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: method is never used: `head_ref` [INFO] [stderr] --> src/list.rs:29:5 [INFO] [stderr] | [INFO] [stderr] 29 | pub fn head_ref(&self) -> Option { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: constant item is never used: `N` [INFO] [stderr] --> src/main.rs:13:5 [INFO] [stderr] | [INFO] [stderr] 13 | const N: usize = 10; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `test_list` [INFO] [stderr] --> src/main.rs:39:4 [INFO] [stderr] | [INFO] [stderr] 39 | fn test_list() { [INFO] [stderr] | ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 12 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.07s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/rust_hello-ae25e1998e46851f [INFO] running `"docker" "inspect" "d20ee0f0d63dcca2f4bdf18b7b5175b54cbdece592bf52dfbf544a7f6d656a6f"` [INFO] running `"docker" "rm" "-f" "d20ee0f0d63dcca2f4bdf18b7b5175b54cbdece592bf52dfbf544a7f6d656a6f"` [INFO] [stdout] d20ee0f0d63dcca2f4bdf18b7b5175b54cbdece592bf52dfbf544a7f6d656a6f