[INFO] fetching crate synfuzz 0.1.0...
[INFO] checking synfuzz-0.1.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate synfuzz 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate synfuzz 0.1.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 73caa4bcc9fce91dd13bb2eb85adaf576b3bb43fd468fffefa38bd4eb973a7aa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "73caa4bcc9fce91dd13bb2eb85adaf576b3bb43fd468fffefa38bd4eb973a7aa"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking synfuzz v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/combinator.rs:22:26
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub choices: Vec<Box<Generator>>,
[INFO] [stderr]    |                          ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/combinator.rs:55:32
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn choice(choices: Vec<Box<Generator>>) -> impl Generator {
[INFO] [stderr]    |                                ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/combinator.rs:62:24
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub generator: Box<Generator>,
[INFO] [stderr]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/combinator.rs:90:24
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub generator: Box<Generator>,
[INFO] [stderr]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:119:24
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:157:47
[INFO] [stderr]     |
[INFO] [stderr] 157 |     pub rules: Arc<RwLock<HashMap<String, Box<Generator>>>>,
[INFO] [stderr]     |                                               ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:212:38
[INFO] [stderr]     |
[INFO] [stderr] 212 | pub type Rules = HashMap<String, Box<Generator>>;
[INFO] [stderr]     |                                      ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:220:29
[INFO] [stderr]     |
[INFO] [stderr] 220 |     pub generators: Vec<Box<Generator>>,
[INFO] [stderr]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:238:32
[INFO] [stderr]     |
[INFO] [stderr] 238 | pub fn seq(generators: Vec<Box<Generator>>) -> impl Generator {
[INFO] [stderr]     |                                ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:249:24
[INFO] [stderr]     |
[INFO] [stderr] 249 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:288:24
[INFO] [stderr]     |
[INFO] [stderr] 288 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:323:29
[INFO] [stderr]     |
[INFO] [stderr] 323 |     pub generators: Vec<Box<Generator>>,
[INFO] [stderr]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:324:24
[INFO] [stderr]     |
[INFO] [stderr] 324 |     pub delimiter: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:357:25
[INFO] [stderr]     |
[INFO] [stderr] 357 |     generators: Vec<Box<Generator>>,
[INFO] [stderr]     |                         ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:371:24
[INFO] [stderr]     |
[INFO] [stderr] 371 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:372:24
[INFO] [stderr]     |
[INFO] [stderr] 372 |     pub separator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:418:24
[INFO] [stderr]     |
[INFO] [stderr] 418 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:419:24
[INFO] [stderr]     |
[INFO] [stderr] 419 |     pub separator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:465:24
[INFO] [stderr]     |
[INFO] [stderr] 465 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/combinator.rs:22:26
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub choices: Vec<Box<Generator>>,
[INFO] [stderr]    |                          ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/combinator.rs:55:32
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub fn choice(choices: Vec<Box<Generator>>) -> impl Generator {
[INFO] [stderr]    |                                ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/combinator.rs:62:24
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub generator: Box<Generator>,
[INFO] [stderr]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/combinator.rs:90:24
[INFO] [stderr]    |
[INFO] [stderr] 90 |     pub generator: Box<Generator>,
[INFO] [stderr]    |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:119:24
[INFO] [stderr]     |
[INFO] [stderr] 119 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:157:47
[INFO] [stderr]     |
[INFO] [stderr] 157 |     pub rules: Arc<RwLock<HashMap<String, Box<Generator>>>>,
[INFO] [stderr]     |                                               ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:212:38
[INFO] [stderr]     |
[INFO] [stderr] 212 | pub type Rules = HashMap<String, Box<Generator>>;
[INFO] [stderr]     |                                      ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:220:29
[INFO] [stderr]     |
[INFO] [stderr] 220 |     pub generators: Vec<Box<Generator>>,
[INFO] [stderr]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:238:32
[INFO] [stderr]     |
[INFO] [stderr] 238 | pub fn seq(generators: Vec<Box<Generator>>) -> impl Generator {
[INFO] [stderr]     |                                ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:249:24
[INFO] [stderr]     |
[INFO] [stderr] 249 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:288:24
[INFO] [stderr]     |
[INFO] [stderr] 288 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:323:29
[INFO] [stderr]     |
[INFO] [stderr] 323 |     pub generators: Vec<Box<Generator>>,
[INFO] [stderr]     |                             ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:324:24
[INFO] [stderr]     |
[INFO] [stderr] 324 |     pub delimiter: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:357:25
[INFO] [stderr]     |
[INFO] [stderr] 357 |     generators: Vec<Box<Generator>>,
[INFO] [stderr]     |                         ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:371:24
[INFO] [stderr]     |
[INFO] [stderr] 371 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:372:24
[INFO] [stderr]     |
[INFO] [stderr] 372 |     pub separator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:418:24
[INFO] [stderr]     |
[INFO] [stderr] 418 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:419:24
[INFO] [stderr]     |
[INFO] [stderr] 419 |     pub separator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/combinator.rs:465:24
[INFO] [stderr]     |
[INFO] [stderr] 465 |     pub generator: Box<Generator>,
[INFO] [stderr]     |                        ^^^^^^^^^ help: use `dyn`: `dyn Generator`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> examples/expression.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `"docker" "inspect" "73caa4bcc9fce91dd13bb2eb85adaf576b3bb43fd468fffefa38bd4eb973a7aa"`
[INFO] running `"docker" "rm" "-f" "73caa4bcc9fce91dd13bb2eb85adaf576b3bb43fd468fffefa38bd4eb973a7aa"`
[INFO] [stdout] 73caa4bcc9fce91dd13bb2eb85adaf576b3bb43fd468fffefa38bd4eb973a7aa