[INFO] crate synfuzz 0.1.0 is already in cache
[INFO] extracting crate synfuzz 0.1.0 into work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/synfuzz/0.1.0
[INFO] extracting crate synfuzz 0.1.0 into work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/synfuzz/0.1.0
[INFO] validating manifest of synfuzz-0.1.0 on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of synfuzz-0.1.0 on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing synfuzz-0.1.0
[INFO] finished frobbing synfuzz-0.1.0
[INFO] frobbed toml for synfuzz-0.1.0 written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/synfuzz/0.1.0/Cargo.toml
[INFO] started frobbing synfuzz-0.1.0
[INFO] finished frobbing synfuzz-0.1.0
[INFO] frobbed toml for synfuzz-0.1.0 written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/reg/synfuzz/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking synfuzz-0.1.0 against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-3/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/reg/synfuzz/0.1.0:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f0bf7cbb28e33c7203f9fbedd9b43b7f14ce9a42c8bec5926e9fb404d0e1dfd3
[INFO] running `"docker" "start" "-a" "f0bf7cbb28e33c7203f9fbedd9b43b7f14ce9a42c8bec5926e9fb404d0e1dfd3"`
[INFO] [stderr]     Checking synfuzz v0.1.0 (/opt/crater/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 0.75s
[INFO] running `"docker" "inspect" "f0bf7cbb28e33c7203f9fbedd9b43b7f14ce9a42c8bec5926e9fb404d0e1dfd3"`
[INFO] running `"docker" "rm" "-f" "f0bf7cbb28e33c7203f9fbedd9b43b7f14ce9a42c8bec5926e9fb404d0e1dfd3"`
[INFO] [stdout] f0bf7cbb28e33c7203f9fbedd9b43b7f14ce9a42c8bec5926e9fb404d0e1dfd3