[INFO] crate carnix 0.10.2 is already in cache [INFO] extracting crate carnix 0.10.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/carnix/0.10.2 [INFO] extracting crate carnix 0.10.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/carnix/0.10.2 [INFO] validating manifest of carnix-0.10.2 on toolchain 1.37.0 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of carnix-0.10.2 on toolchain beta-2019-08-13 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing carnix-0.10.2 [INFO] finished frobbing carnix-0.10.2 [INFO] frobbed toml for carnix-0.10.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/carnix/0.10.2/Cargo.toml [INFO] started frobbing carnix-0.10.2 [INFO] finished frobbing carnix-0.10.2 [INFO] frobbed toml for carnix-0.10.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/carnix/0.10.2/Cargo.toml [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing carnix-0.10.2 against beta-2019-08-13 for beta-1.38-1 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/carnix/0.10.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"` [INFO] [stdout] 2055b93616bdaf32d87fb5415d3be5731dcd0d1f1ed931a3a7f05509394f99ab [INFO] running `"docker" "start" "-a" "2055b93616bdaf32d87fb5415d3be5731dcd0d1f1ed931a3a7f05509394f99ab"` [INFO] [stderr] Compiling failure v0.1.5 [INFO] [stderr] Compiling carnix v0.10.2 (/opt/crater/workdir) [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:33:23 [INFO] [stderr] | [INFO] [stderr] 33 | pub fn to_nix(w: &mut Write, target: &[Cfg]) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:37:22 [INFO] [stderr] | [INFO] [stderr] 37 | fn to_nix_op(w: &mut Write, op: CfgOp, target: &[Cfg]) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:66:22 [INFO] [stderr] | [INFO] [stderr] 66 | fn cfg_value(w: &mut Write, key: &str, value: &str) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:155:23 [INFO] [stderr] | [INFO] [stderr] 155 | let file: Box = if let Some(f) = matches.value_of("file") { [INFO] [stderr] | ^^^^^^^^^^^^^ help: use `dyn`: `dyn std::io::Read` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:200:23 [INFO] [stderr] | [INFO] [stderr] 200 | let file: Box = if let Some(v) = matches.values_of("file") { [INFO] [stderr] | ^^^^^^^^^^^^^ help: use `dyn`: `dyn std::io::Read` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:201:31 [INFO] [stderr] | [INFO] [stderr] 201 | let mut file: Box = Box::new(std::io::empty()); [INFO] [stderr] | ^^^^^^^^^^^^^ help: use `dyn`: `dyn std::io::Read` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:33:23 [INFO] [stderr] | [INFO] [stderr] 33 | pub fn to_nix(w: &mut Write, target: &[Cfg]) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:37:22 [INFO] [stderr] | [INFO] [stderr] 37 | fn to_nix_op(w: &mut Write, op: CfgOp, target: &[Cfg]) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:66:22 [INFO] [stderr] | [INFO] [stderr] 66 | fn cfg_value(w: &mut Write, key: &str, value: &str) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:409:21 [INFO] [stderr] | [INFO] [stderr] 409 | let mut pack = pack.as_table_mut().unwrap(); [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/output.rs:466:28 [INFO] [stderr] | [INFO] [stderr] 466 | Ok(mut prefetch) => Some(prefetch), [INFO] [stderr] | ----^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:827:21 [INFO] [stderr] | [INFO] [stderr] 827 | let mut e = output_features.entry(dep).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:877:21 [INFO] [stderr] | [INFO] [stderr] 877 | let mut e = output_features [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:888:29 [INFO] [stderr] | [INFO] [stderr] 888 | let mut e = output_features.entry(dep_name).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:917:21 [INFO] [stderr] | [INFO] [stderr] 917 | let mut e = output_features.entry(dep).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:133:13 [INFO] [stderr] | [INFO] [stderr] 133 | let mut bindir = Path::new(path.trim()).join("bin"); [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/output.rs:409:21 [INFO] [stderr] | [INFO] [stderr] 409 | let mut pack = pack.as_table_mut().unwrap(); [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:466:28 [INFO] [stderr] | [INFO] [stderr] 466 | Ok(mut prefetch) => Some(prefetch), [INFO] [stderr] | ----^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:827:21 [INFO] [stderr] | [INFO] [stderr] 827 | let mut e = output_features.entry(dep).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:877:21 [INFO] [stderr] | [INFO] [stderr] 877 | let mut e = output_features [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:888:29 [INFO] [stderr] | [INFO] [stderr] 888 | let mut e = output_features.entry(dep_name).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:917:21 [INFO] [stderr] | [INFO] [stderr] 917 | let mut e = output_features.entry(dep).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 21.59s [INFO] running `"docker" "inspect" "2055b93616bdaf32d87fb5415d3be5731dcd0d1f1ed931a3a7f05509394f99ab"` [INFO] running `"docker" "rm" "-f" "2055b93616bdaf32d87fb5415d3be5731dcd0d1f1ed931a3a7f05509394f99ab"` [INFO] [stdout] 2055b93616bdaf32d87fb5415d3be5731dcd0d1f1ed931a3a7f05509394f99ab [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/carnix/0.10.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"` [INFO] [stdout] 17459e0c8f2ab95bfb26a7b27318c9e7be76ae4e186285c83cab89bb5b4b5d75 [INFO] running `"docker" "start" "-a" "17459e0c8f2ab95bfb26a7b27318c9e7be76ae4e186285c83cab89bb5b4b5d75"` [INFO] [stderr] Compiling carnix v0.10.2 (/opt/crater/workdir) [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:33:23 [INFO] [stderr] | [INFO] [stderr] 33 | pub fn to_nix(w: &mut Write, target: &[Cfg]) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:37:22 [INFO] [stderr] | [INFO] [stderr] 37 | fn to_nix_op(w: &mut Write, op: CfgOp, target: &[Cfg]) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:66:22 [INFO] [stderr] | [INFO] [stderr] 66 | fn cfg_value(w: &mut Write, key: &str, value: &str) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:155:23 [INFO] [stderr] | [INFO] [stderr] 155 | let file: Box = if let Some(f) = matches.value_of("file") { [INFO] [stderr] | ^^^^^^^^^^^^^ help: use `dyn`: `dyn std::io::Read` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:200:23 [INFO] [stderr] | [INFO] [stderr] 200 | let file: Box = if let Some(v) = matches.values_of("file") { [INFO] [stderr] | ^^^^^^^^^^^^^ help: use `dyn`: `dyn std::io::Read` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/main.rs:201:31 [INFO] [stderr] | [INFO] [stderr] 201 | let mut file: Box = Box::new(std::io::empty()); [INFO] [stderr] | ^^^^^^^^^^^^^ help: use `dyn`: `dyn std::io::Read` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:33:23 [INFO] [stderr] | [INFO] [stderr] 33 | pub fn to_nix(w: &mut Write, target: &[Cfg]) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:37:22 [INFO] [stderr] | [INFO] [stderr] 37 | fn to_nix_op(w: &mut Write, op: CfgOp, target: &[Cfg]) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] [INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated [INFO] [stderr] --> src/cfg.rs:66:22 [INFO] [stderr] | [INFO] [stderr] 66 | fn cfg_value(w: &mut Write, key: &str, value: &str) -> Result<(), Error> { [INFO] [stderr] | ^^^^^ help: use `dyn`: `dyn Write` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `i` [INFO] [stderr] --> src/cfg.rs:154:30 [INFO] [stderr] | [INFO] [stderr] 154 | if let IResult::Done(ref i, ref o) = x { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_i` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `i` [INFO] [stderr] --> src/cfg.rs:165:30 [INFO] [stderr] | [INFO] [stderr] 165 | if let IResult::Done(ref i, ref o) = x { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_i` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `i` [INFO] [stderr] --> src/cfg.rs:154:30 [INFO] [stderr] | [INFO] [stderr] 154 | if let IResult::Done(ref i, ref o) = x { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_i` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `i` [INFO] [stderr] --> src/cfg.rs:165:30 [INFO] [stderr] | [INFO] [stderr] 165 | if let IResult::Done(ref i, ref o) = x { [INFO] [stderr] | ^ help: consider prefixing with an underscore: `_i` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:133:13 [INFO] [stderr] | [INFO] [stderr] 133 | let mut bindir = Path::new(path.trim()).join("bin"); [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/output.rs:409:21 [INFO] [stderr] | [INFO] [stderr] 409 | let mut pack = pack.as_table_mut().unwrap(); [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/output.rs:466:28 [INFO] [stderr] | [INFO] [stderr] 466 | Ok(mut prefetch) => Some(prefetch), [INFO] [stderr] | ----^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:409:21 [INFO] [stderr] | [INFO] [stderr] 409 | let mut pack = pack.as_table_mut().unwrap(); [INFO] [stderr] | ----^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:466:28 [INFO] [stderr] | [INFO] [stderr] 466 | Ok(mut prefetch) => Some(prefetch), [INFO] [stderr] | ----^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:827:21 [INFO] [stderr] | [INFO] [stderr] 827 | let mut e = output_features.entry(dep).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:877:21 [INFO] [stderr] | [INFO] [stderr] 877 | let mut e = output_features [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:888:29 [INFO] [stderr] | [INFO] [stderr] 888 | let mut e = output_features.entry(dep_name).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:917:21 [INFO] [stderr] | [INFO] [stderr] 917 | let mut e = output_features.entry(dep).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:827:21 [INFO] [stderr] | [INFO] [stderr] 827 | let mut e = output_features.entry(dep).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:877:21 [INFO] [stderr] | [INFO] [stderr] 877 | let mut e = output_features [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:888:29 [INFO] [stderr] | [INFO] [stderr] 888 | let mut e = output_features.entry(dep_name).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/output.rs:917:21 [INFO] [stderr] | [INFO] [stderr] 917 | let mut e = output_features.entry(dep).or_insert(Vec::new()); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 5.15s [INFO] running `"docker" "inspect" "17459e0c8f2ab95bfb26a7b27318c9e7be76ae4e186285c83cab89bb5b4b5d75"` [INFO] running `"docker" "rm" "-f" "17459e0c8f2ab95bfb26a7b27318c9e7be76ae4e186285c83cab89bb5b4b5d75"` [INFO] [stdout] 17459e0c8f2ab95bfb26a7b27318c9e7be76ae4e186285c83cab89bb5b4b5d75 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/carnix/0.10.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"` [INFO] [stdout] 27816a3f7d25c34c7f88f527eb5981e38bd2fe202ed9679f0706887e29fcdbff [INFO] running `"docker" "start" "-a" "27816a3f7d25c34c7f88f527eb5981e38bd2fe202ed9679f0706887e29fcdbff"` [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.15s [INFO] [stderr] Running /opt/crater/target/debug/deps/cargo_generate_nixfile-88bcc1a0f735170d [INFO] [stdout] [INFO] [stdout] running 2 tests [INFO] [stdout] test cfg::test_cfg ... ok [INFO] [stdout] test cfg::test_any ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] [stderr] Running /opt/crater/target/debug/deps/carnix-90351bc178c46dce [INFO] [stdout] [INFO] [stdout] running 2 tests [INFO] [stdout] test cfg::test_cfg ... ok [INFO] [stdout] test cfg::test_any ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "27816a3f7d25c34c7f88f527eb5981e38bd2fe202ed9679f0706887e29fcdbff"` [INFO] running `"docker" "rm" "-f" "27816a3f7d25c34c7f88f527eb5981e38bd2fe202ed9679f0706887e29fcdbff"` [INFO] [stdout] 27816a3f7d25c34c7f88f527eb5981e38bd2fe202ed9679f0706887e29fcdbff