[INFO] updating cached repository scampi/falcon
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/scampi/falcon
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/scampi/falcon" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/scampi/falcon"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/scampi/falcon'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/scampi/falcon" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/scampi/falcon"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/scampi/falcon'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ae5bbcb8e4b04c503f246c4d52e15b1417124731
[INFO] sha for GitHub repo scampi/falcon: ae5bbcb8e4b04c503f246c4d52e15b1417124731
[INFO] validating manifest of scampi/falcon on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of scampi/falcon on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing scampi/falcon
[INFO] finished frobbing scampi/falcon
[INFO] frobbed toml for scampi/falcon written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/scampi/falcon/Cargo.toml
[INFO] started frobbing scampi/falcon
[INFO] finished frobbing scampi/falcon
[INFO] frobbed toml for scampi/falcon written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/scampi/falcon/Cargo.toml
[INFO] crate scampi/falcon already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking scampi/falcon against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-5/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/scampi/falcon:/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=forbid" "-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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 364b11df1e540fb60b7b01a0f6e25f511be0f7b49d92418b3b3c91d9b6d88a05
[INFO] running `"docker" "start" "-a" "364b11df1e540fb60b7b01a0f6e25f511be0f7b49d92418b3b3c91d9b6d88a05"`
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking exitcode v1.1.2
[INFO] [stderr]    Compiling structopt-derive v0.2.14
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking combine v3.6.3
[INFO] [stderr]     Checking structopt v0.2.14
[INFO] [stderr]     Checking falcon v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Parser`
[INFO] [stderr]   --> src/parser/program.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |         Parser,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Parser`
[INFO] [stderr]   --> src/parser/stmt.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |         Parser,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `redir`
[INFO] [stderr]   --> src/interpreter/stmt.rs:26:32
[INFO] [stderr]    |
[INFO] [stderr] 26 |             Stmt::Print(exprs, redir) => {
[INFO] [stderr]    |                                ^^^^^ help: consider prefixing with an underscore: `_redir`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `redir`
[INFO] [stderr]   --> src/interpreter/stmt.rs:26:32
[INFO] [stderr]    |
[INFO] [stderr] 26 |             Stmt::Print(exprs, redir) => {
[INFO] [stderr]    |                                ^^^^^ help: consider prefixing with an underscore: `_redir`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Exit`
[INFO] [stderr]   --> src/interpreter/stmt.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Exit(isize),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `empty`
[INFO] [stderr]   --> src/parser/ast.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     pub fn empty() -> Program {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Exit`
[INFO] [stderr]   --> src/interpreter/stmt.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     Exit(isize),
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.02s
[INFO] running `"docker" "inspect" "364b11df1e540fb60b7b01a0f6e25f511be0f7b49d92418b3b3c91d9b6d88a05"`
[INFO] running `"docker" "rm" "-f" "364b11df1e540fb60b7b01a0f6e25f511be0f7b49d92418b3b3c91d9b6d88a05"`
[INFO] [stdout] 364b11df1e540fb60b7b01a0f6e25f511be0f7b49d92418b3b3c91d9b6d88a05