[INFO] fetching crate mwmatching 0.1.1... [INFO] testing mwmatching-0.1.1 against 1.44.0 for beta-1.45-1 [INFO] extracting crate mwmatching 0.1.1 into /workspace/builds/worker-8/source [INFO] validating manifest of crates.io crate mwmatching 0.1.1 on toolchain 1.44.0 [INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking crates.io crate mwmatching 0.1.1 [INFO] finished tweaking crates.io crate mwmatching 0.1.1 [INFO] tweaked toml for crates.io crate mwmatching 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml [INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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" "+1.44.0" "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] 29a18590d18e0e16f954e01afec58eaed6c289965281917c6121734c5e3a6a70 [INFO] running `"docker" "start" "-a" "29a18590d18e0e16f954e01afec58eaed6c289965281917c6121734c5e3a6a70"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling mwmatching v0.1.1 (/opt/rustwide/workdir) [INFO] [stderr] warning: unnecessary parentheses around block return value [INFO] [stderr] --> src/lib.rs:1083:60 [INFO] [stderr] | [INFO] [stderr] 1083 | let actual_index = if index>= 0 {index as usize} else {(v.len()-(-index) as usize)}; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:744:25 [INFO] [stderr] | [INFO] [stderr] 744 | let mut k = p / 2; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:852:29 [INFO] [stderr] | [INFO] [stderr] 852 | let mut k = p / 2; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2.29s [INFO] running `"docker" "inspect" "29a18590d18e0e16f954e01afec58eaed6c289965281917c6121734c5e3a6a70"` [INFO] running `"docker" "rm" "-f" "29a18590d18e0e16f954e01afec58eaed6c289965281917c6121734c5e3a6a70"` [INFO] [stdout] 29a18590d18e0e16f954e01afec58eaed6c289965281917c6121734c5e3a6a70 [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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" "+1.44.0" "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] 822bac487b57a0486a99da0d2df0a40a8f7dcb0ef22c163bc50324e3f4691a90 [INFO] running `"docker" "start" "-a" "822bac487b57a0486a99da0d2df0a40a8f7dcb0ef22c163bc50324e3f4691a90"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling mwmatching v0.1.1 (/opt/rustwide/workdir) [INFO] [stderr] warning: unnecessary parentheses around block return value [INFO] [stderr] --> src/lib.rs:1083:60 [INFO] [stderr] | [INFO] [stderr] 1083 | let actual_index = if index>= 0 {index as usize} else {(v.len()-(-index) as usize)}; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:744:25 [INFO] [stderr] | [INFO] [stderr] 744 | let mut k = p / 2; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:852:29 [INFO] [stderr] | [INFO] [stderr] 852 | let mut k = p / 2; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] error[E0463]: can't find crate for `rand` [INFO] [stderr] --> examples/largedata/main.rs:4:1 [INFO] [stderr] | [INFO] [stderr] 4 | extern crate rand; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ can't find crate [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0463`. [INFO] [stderr] error: could not compile `mwmatching`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: unnecessary parentheses around block return value [INFO] [stderr] --> src/lib.rs:1083:60 [INFO] [stderr] | [INFO] [stderr] 1083 | let actual_index = if index>= 0 {index as usize} else {(v.len()-(-index) as usize)}; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:744:25 [INFO] [stderr] | [INFO] [stderr] 744 | let mut k = p / 2; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:852:29 [INFO] [stderr] | [INFO] [stderr] 852 | let mut k = p / 2; [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: 3 warnings emitted [INFO] [stderr] [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "822bac487b57a0486a99da0d2df0a40a8f7dcb0ef22c163bc50324e3f4691a90"` [INFO] running `"docker" "rm" "-f" "822bac487b57a0486a99da0d2df0a40a8f7dcb0ef22c163bc50324e3f4691a90"` [INFO] [stdout] 822bac487b57a0486a99da0d2df0a40a8f7dcb0ef22c163bc50324e3f4691a90