[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 try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscampi%2Ffalcon" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scampi/falcon on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-7/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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27984fbe64134bfdee33bb087506cc7521d8bb9793fa96027e44c22743842266
[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" "27984fbe64134bfdee33bb087506cc7521d8bb9793fa96027e44c22743842266", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27984fbe64134bfdee33bb087506cc7521d8bb9793fa96027e44c22743842266", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27984fbe64134bfdee33bb087506cc7521d8bb9793fa96027e44c22743842266", kill_on_drop: false }`
[INFO] [stdout] 27984fbe64134bfdee33bb087506cc7521d8bb9793fa96027e44c22743842266
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b366e53a66b4aed46c2beef17df002e8f928480ea187a26a5062dce60a27f33f
[INFO] running `Command { std: "docker" "start" "-a" "b366e53a66b4aed46c2beef17df002e8f928480ea187a26a5062dce60a27f33f", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   libc v0.2.62: default, std
[INFO] [stderr] 
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling getrandom v0.1.9
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling cc v1.0.28
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking rustc-demangle v0.1.11
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking regex-syntax v0.6.11
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking exitcode v1.1.2
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking predicates v1.0.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling backtrace v0.3.13
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking regex v1.2.1
[INFO] [stderr]    Compiling proc-macro-error v0.2.6
[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 structopt-derive v0.3.1
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking structopt v0.3.1
[INFO] [stderr]     Checking falcon v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking serde v1.0.98
[INFO] [stderr]     Checking serde_json v1.0.40
[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] [stderr]     Checking escargot v0.4.0
[INFO] [stderr]     Checking assert_cmd v0.11.1
[INFO] [stderr]    Migrating tests/print.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/common.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/builtin.rs from 2018 edition to 2021
[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: 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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 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 45s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking falcon v0.1.0 (/tmp/fixit)
[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: 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] [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 12.78s
[INFO] running `Command { std: "docker" "inspect" "b366e53a66b4aed46c2beef17df002e8f928480ea187a26a5062dce60a27f33f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b366e53a66b4aed46c2beef17df002e8f928480ea187a26a5062dce60a27f33f", kill_on_drop: false }`
[INFO] [stdout] b366e53a66b4aed46c2beef17df002e8f928480ea187a26a5062dce60a27f33f