[INFO] updating cached repository nbigaouette/dna
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nbigaouette/dna
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nbigaouette/dna" "work/ex/beta-1.38-1/sources/1.37.0/gh/nbigaouette/dna"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nbigaouette/dna'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nbigaouette/dna" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nbigaouette/dna"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nbigaouette/dna'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d4fbbec91f3b52f06cb603ef69c9d1283471858b
[INFO] sha for GitHub repo nbigaouette/dna: d4fbbec91f3b52f06cb603ef69c9d1283471858b
[INFO] validating manifest of nbigaouette/dna 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 nbigaouette/dna 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 nbigaouette/dna
[INFO] finished frobbing nbigaouette/dna
[INFO] frobbed toml for nbigaouette/dna written to work/ex/beta-1.38-1/sources/1.37.0/gh/nbigaouette/dna/Cargo.toml
[INFO] started frobbing nbigaouette/dna
[INFO] finished frobbing nbigaouette/dna
[INFO] frobbed toml for nbigaouette/dna written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nbigaouette/dna/Cargo.toml
[INFO] crate nbigaouette/dna already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nbigaouette/dna/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing nbigaouette/dna against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nbigaouette/dna:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] c957ab0a9bf8db93c456132b495468823d10a641e836f2f3de9ad0007fcec339
[INFO] running `"docker" "start" "-a" "c957ab0a9bf8db93c456132b495468823d10a641e836f2f3de9ad0007fcec339"`
[INFO] [stderr]    Compiling shellexpand v0.1.0
[INFO] [stderr]    Compiling dna v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `nb_steps`
[INFO] [stderr]    --> src/lib.rs:216:9
[INFO] [stderr]     |
[INFO] [stderr] 216 |     let nb_steps = steps.len();
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_nb_steps`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]    --> src/lib.rs:217:10
[INFO] [stderr]     |
[INFO] [stderr] 217 |     for (idx, step) in steps.into_iter().enumerate() {
[INFO] [stderr]     |          ^^^ help: consider prefixing with an underscore: `_idx`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/lib.rs:220:25
[INFO] [stderr]     |
[INFO] [stderr] 220 |             Step::Echo {name, message} => {
[INFO] [stderr]     |                         ^^^^ help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/lib.rs:224:24
[INFO] [stderr]     |
[INFO] [stderr] 224 |             Step::Run {name, command, arguments, on_success, on_failure} => {
[INFO] [stderr]     |                        ^^^^ help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/lib.rs:270:26
[INFO] [stderr]     |
[INFO] [stderr] 270 |             Step::Shell {name, command, stdout, on_success, on_failure} => {
[INFO] [stderr]     |                          ^^^^ help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `filename`
[INFO] [stderr]    --> src/lib.rs:291:33
[INFO] [stderr]     |
[INFO] [stderr] 291 |                     Pipe::File {filename} => {
[INFO] [stderr]     |                                 ^^^^^^^^ help: try ignoring the field: `filename: _`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Null`
[INFO] [stderr]   --> src/lib.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     Null,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `StdErr`
[INFO] [stderr]   --> src/lib.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     StdErr,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `File`
[INFO] [stderr]   --> src/lib.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     File {filename: String},
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.12s
[INFO] running `"docker" "inspect" "c957ab0a9bf8db93c456132b495468823d10a641e836f2f3de9ad0007fcec339"`
[INFO] running `"docker" "rm" "-f" "c957ab0a9bf8db93c456132b495468823d10a641e836f2f3de9ad0007fcec339"`
[INFO] [stdout] c957ab0a9bf8db93c456132b495468823d10a641e836f2f3de9ad0007fcec339
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nbigaouette/dna:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 45c8af76430400ab644ddfe6f5ce8c4ea4440fbcba88f0a2c22ac62ac580403c
[INFO] running `"docker" "start" "-a" "45c8af76430400ab644ddfe6f5ce8c4ea4440fbcba88f0a2c22ac62ac580403c"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling dna v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `nb_steps`
[INFO] [stderr]    --> src/lib.rs:216:9
[INFO] [stderr]     |
[INFO] [stderr] 216 |     let nb_steps = steps.len();
[INFO] [stderr]     |         ^^^^^^^^ help: consider prefixing with an underscore: `_nb_steps`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]    --> src/lib.rs:217:10
[INFO] [stderr]     |
[INFO] [stderr] 217 |     for (idx, step) in steps.into_iter().enumerate() {
[INFO] [stderr]     |          ^^^ help: consider prefixing with an underscore: `_idx`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/lib.rs:220:25
[INFO] [stderr]     |
[INFO] [stderr] 220 |             Step::Echo {name, message} => {
[INFO] [stderr]     |                         ^^^^ help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/lib.rs:224:24
[INFO] [stderr]     |
[INFO] [stderr] 224 |             Step::Run {name, command, arguments, on_success, on_failure} => {
[INFO] [stderr]     |                        ^^^^ help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/lib.rs:270:26
[INFO] [stderr]     |
[INFO] [stderr] 270 |             Step::Shell {name, command, stdout, on_success, on_failure} => {
[INFO] [stderr]     |                          ^^^^ help: try ignoring the field: `name: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `filename`
[INFO] [stderr]    --> src/lib.rs:291:33
[INFO] [stderr]     |
[INFO] [stderr] 291 |                     Pipe::File {filename} => {
[INFO] [stderr]     |                                 ^^^^^^^^ help: try ignoring the field: `filename: _`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Null`
[INFO] [stderr]   --> src/lib.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     Null,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `StdErr`
[INFO] [stderr]   --> src/lib.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     StdErr,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `File`
[INFO] [stderr]   --> src/lib.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     File {filename: String},
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "45c8af76430400ab644ddfe6f5ce8c4ea4440fbcba88f0a2c22ac62ac580403c"`
[INFO] running `"docker" "rm" "-f" "45c8af76430400ab644ddfe6f5ce8c4ea4440fbcba88f0a2c22ac62ac580403c"`
[INFO] [stdout] 45c8af76430400ab644ddfe6f5ce8c4ea4440fbcba88f0a2c22ac62ac580403c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nbigaouette/dna:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 3a8683de7a947df6bb8e1c47ba0806d3e6ecd56e946b0ce7daadb8c222e381d6
[INFO] running `"docker" "start" "-a" "3a8683de7a947df6bb8e1c47ba0806d3e6ecd56e946b0ce7daadb8c222e381d6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/dna-4ffb83b02414b9ad
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests dna
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "3a8683de7a947df6bb8e1c47ba0806d3e6ecd56e946b0ce7daadb8c222e381d6"`
[INFO] running `"docker" "rm" "-f" "3a8683de7a947df6bb8e1c47ba0806d3e6ecd56e946b0ce7daadb8c222e381d6"`
[INFO] [stdout] 3a8683de7a947df6bb8e1c47ba0806d3e6ecd56e946b0ce7daadb8c222e381d6