[INFO] cloning repository https://github.com/scampi/falcon
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/scampi/falcon" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscampi%2Ffalcon", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscampi%2Ffalcon'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a0cfc078d782d89ef5523957b8cc4a12e11ef9bf
[INFO] checking scampi/falcon against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscampi%2Ffalcon" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scampi/falcon on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/scampi/falcon
[INFO] finished tweaking git repo https://github.com/scampi/falcon
[INFO] tweaked toml for git repo https://github.com/scampi/falcon written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/scampi/falcon already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9f8089a3a7637ace52a787612f7a3fdf3ca2e6d486f92842dea5fdb5caae6be4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9f8089a3a7637ace52a787612f7a3fdf3ca2e6d486f92842dea5fdb5caae6be4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f8089a3a7637ace52a787612f7a3fdf3ca2e6d486f92842dea5fdb5caae6be4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f8089a3a7637ace52a787612f7a3fdf3ca2e6d486f92842dea5fdb5caae6be4", kill_on_drop: false }`
[INFO] [stdout] 9f8089a3a7637ace52a787612f7a3fdf3ca2e6d486f92842dea5fdb5caae6be4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63e66ea27f364f083bdbd754f313efbfdb1412e95823b87aa7d13988583f7440
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "63e66ea27f364f083bdbd754f313efbfdb1412e95823b87aa7d13988583f7440", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling getrandom v0.1.9
[INFO] [stderr]    Compiling cc v1.0.28
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking rustc-demangle v0.1.11
[INFO] [stderr]    Compiling escargot v0.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.11
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking ascii v0.9.1
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking exitcode v1.1.2
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking memchr v2.2.1
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking regex v1.2.1
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]    Compiling structopt-derive v0.3.1
[INFO] [stderr]     Checking structopt v0.3.1
[INFO] [stderr]     Checking falcon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde v1.0.98
[INFO] [stdout] warning: unused import: `Parser`
[INFO] [stdout]   --> src/parser/program.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |         Parser,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Parser`
[INFO] [stdout]   --> src/parser/stmt.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         Parser,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Exit`
[INFO] [stdout]   --> src/interpreter/stmt.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Exit(isize),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stdout] warning: associated function is never used: `stderr`
[INFO] [stdout]   --> tests/common.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 38 |     pub fn stderr(mut self, stderr: &'a str) -> Self {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `should_fail`
[INFO] [stdout]   --> tests/common.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn should_fail(mut self) -> Self {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Exit`
[INFO] [stdout]   --> src/interpreter/stmt.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Exit(isize),
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 35s
[INFO] running `Command { std: "docker" "inspect" "63e66ea27f364f083bdbd754f313efbfdb1412e95823b87aa7d13988583f7440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63e66ea27f364f083bdbd754f313efbfdb1412e95823b87aa7d13988583f7440", kill_on_drop: false }`
[INFO] [stdout] 63e66ea27f364f083bdbd754f313efbfdb1412e95823b87aa7d13988583f7440