[INFO] fetching crate synfuzz 0.1.0...
[INFO] checking synfuzz-0.1.0 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate synfuzz 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate synfuzz 0.1.0 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate synfuzz 0.1.0
[INFO] finished tweaking crates.io crate synfuzz 0.1.0
[INFO] tweaked toml for crates.io crate synfuzz 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bf3fb72a8ab48b4b79779b18cb3eaa200f56bc22ed4269825cd9e138a6a7f948
[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" "bf3fb72a8ab48b4b79779b18cb3eaa200f56bc22ed4269825cd9e138a6a7f948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bf3fb72a8ab48b4b79779b18cb3eaa200f56bc22ed4269825cd9e138a6a7f948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf3fb72a8ab48b4b79779b18cb3eaa200f56bc22ed4269825cd9e138a6a7f948", kill_on_drop: false }`
[INFO] [stdout] bf3fb72a8ab48b4b79779b18cb3eaa200f56bc22ed4269825cd9e138a6a7f948
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f3428ab90c83118fe4af865d3ca3d0e0262645bbf1a9eaa298314facb050c7c2
[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" "f3428ab90c83118fe4af865d3ca3d0e0262645bbf1a9eaa298314facb050c7c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking synfuzz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/combinator.rs:22:26
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub choices: Vec<Box<Generator>>,
[INFO] [stdout]    |                          ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/combinator.rs:55:32
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn choice(choices: Vec<Box<Generator>>) -> impl Generator {
[INFO] [stdout]    |                                ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/combinator.rs:62:24
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub generator: Box<Generator>,
[INFO] [stdout]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/combinator.rs:90:24
[INFO] [stdout]    |
[INFO] [stdout] 90 |     pub generator: Box<Generator>,
[INFO] [stdout]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:119:24
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:157:47
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub rules: Arc<RwLock<HashMap<String, Box<Generator>>>>,
[INFO] [stdout]     |                                               ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:212:38
[INFO] [stdout]     |
[INFO] [stdout] 212 | pub type Rules = HashMap<String, Box<Generator>>;
[INFO] [stdout]     |                                      ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:220:29
[INFO] [stdout]     |
[INFO] [stdout] 220 |     pub generators: Vec<Box<Generator>>,
[INFO] [stdout]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:238:32
[INFO] [stdout]     |
[INFO] [stdout] 238 | pub fn seq(generators: Vec<Box<Generator>>) -> impl Generator {
[INFO] [stdout]     |                                ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:249:24
[INFO] [stdout]     |
[INFO] [stdout] 249 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:288:24
[INFO] [stdout]     |
[INFO] [stdout] 288 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:323:29
[INFO] [stdout]     |
[INFO] [stdout] 323 |     pub generators: Vec<Box<Generator>>,
[INFO] [stdout]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:324:24
[INFO] [stdout]     |
[INFO] [stdout] 324 |     pub delimiter: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:357:25
[INFO] [stdout]     |
[INFO] [stdout] 357 |     generators: Vec<Box<Generator>>,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:371:24
[INFO] [stdout]     |
[INFO] [stdout] 371 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:372:24
[INFO] [stdout]     |
[INFO] [stdout] 372 |     pub separator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:418:24
[INFO] [stdout]     |
[INFO] [stdout] 418 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:419:24
[INFO] [stdout]     |
[INFO] [stdout] 419 |     pub separator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:465:24
[INFO] [stdout]     |
[INFO] [stdout] 465 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/combinator.rs:22:26
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub choices: Vec<Box<Generator>>,
[INFO] [stdout]    |                          ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/combinator.rs:55:32
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn choice(choices: Vec<Box<Generator>>) -> impl Generator {
[INFO] [stdout]    |                                ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/combinator.rs:62:24
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub generator: Box<Generator>,
[INFO] [stdout]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/combinator.rs:90:24
[INFO] [stdout]    |
[INFO] [stdout] 90 |     pub generator: Box<Generator>,
[INFO] [stdout]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:119:24
[INFO] [stdout]     |
[INFO] [stdout] 119 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:157:47
[INFO] [stdout]     |
[INFO] [stdout] 157 |     pub rules: Arc<RwLock<HashMap<String, Box<Generator>>>>,
[INFO] [stdout]     |                                               ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:212:38
[INFO] [stdout]     |
[INFO] [stdout] 212 | pub type Rules = HashMap<String, Box<Generator>>;
[INFO] [stdout]     |                                      ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:220:29
[INFO] [stdout]     |
[INFO] [stdout] 220 |     pub generators: Vec<Box<Generator>>,
[INFO] [stdout]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:238:32
[INFO] [stdout]     |
[INFO] [stdout] 238 | pub fn seq(generators: Vec<Box<Generator>>) -> impl Generator {
[INFO] [stdout]     |                                ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:249:24
[INFO] [stdout]     |
[INFO] [stdout] 249 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:288:24
[INFO] [stdout]     |
[INFO] [stdout] 288 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:323:29
[INFO] [stdout]     |
[INFO] [stdout] 323 |     pub generators: Vec<Box<Generator>>,
[INFO] [stdout]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:324:24
[INFO] [stdout]     |
[INFO] [stdout] 324 |     pub delimiter: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:357:25
[INFO] [stdout]     |
[INFO] [stdout] 357 |     generators: Vec<Box<Generator>>,
[INFO] [stdout]     |                         ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:371:24
[INFO] [stdout]     |
[INFO] [stdout] 371 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:372:24
[INFO] [stdout]     |
[INFO] [stdout] 372 |     pub separator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:418:24
[INFO] [stdout]     |
[INFO] [stdout] 418 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:419:24
[INFO] [stdout]     |
[INFO] [stdout] 419 |     pub separator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/combinator.rs:465:24
[INFO] [stdout]     |
[INFO] [stdout] 465 |     pub generator: Box<Generator>,
[INFO] [stdout]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> examples/expression.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.48s
[INFO] running `Command { std: "docker" "inspect" "f3428ab90c83118fe4af865d3ca3d0e0262645bbf1a9eaa298314facb050c7c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3428ab90c83118fe4af865d3ca3d0e0262645bbf1a9eaa298314facb050c7c2", kill_on_drop: false }`
[INFO] [stdout] f3428ab90c83118fe4af865d3ca3d0e0262645bbf1a9eaa298314facb050c7c2
