[INFO] fetching crate smetamath 3.0.0...
[INFO] extracting crate smetamath 3.0.0 into work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/smetamath/3.0.0
[INFO] extracting crate smetamath 3.0.0 into work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/smetamath/3.0.0
[INFO] validating manifest of smetamath-3.0.0 on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of smetamath-3.0.0 on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing smetamath-3.0.0
[INFO] finished frobbing smetamath-3.0.0
[INFO] frobbed toml for smetamath-3.0.0 written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/smetamath/3.0.0/Cargo.toml
[INFO] started frobbing smetamath-3.0.0
[INFO] finished frobbing smetamath-3.0.0
[INFO] frobbed toml for smetamath-3.0.0 written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/reg/smetamath/3.0.0/Cargo.toml
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking smetamath-3.0.0 against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-4/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/reg/smetamath/3.0.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 499c883144ef31ba4a35e41f119890e7dd4a627da06b47e1372bfe623f5118e1
[INFO] running `"docker" "start" "-a" "499c883144ef31ba4a35e41f119890e7dd4a627da06b47e1372bfe623f5118e1"`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking filetime v0.1.15
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking smetamath v3.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/database.rs:29:23
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Job(usize, Box<FnMut() + Send>);
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() + Send`
[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/database.rs:61:60
[INFO] [stderr]    |
[INFO] [stderr] 61 | fn queue_work(exec: &Executor, estimate: usize, mut f: Box<FnMut() + Send>) {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/database.rs:133:27
[INFO] [stderr]     |
[INFO] [stderr] 133 | pub struct Promise<T>(Box<FnMut() -> T + Send>);
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() -> T + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/database.rs:29:23
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct Job(usize, Box<FnMut() + Send>);
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() + Send`
[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/database.rs:61:60
[INFO] [stderr]    |
[INFO] [stderr] 61 | fn queue_work(exec: &Executor, estimate: usize, mut f: Box<FnMut() + Send>) {
[INFO] [stderr]    |                                                            ^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/database.rs:133:27
[INFO] [stderr]     |
[INFO] [stderr] 133 | pub struct Promise<T>(Box<FnMut() -> T + Send>);
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() -> T + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:247:25
[INFO] [stderr]     |
[INFO] [stderr] 247 |                     let mut ns = Arc::make_mut(self.prev_nameset.as_mut().unwrap());
[INFO] [stderr]     |                         ----^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:268:25
[INFO] [stderr]     |
[INFO] [stderr] 268 |                     let mut ns = Arc::make_mut(self.prev_scopes.as_mut().unwrap());
[INFO] [stderr]     |                         ----^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:291:25
[INFO] [stderr]     |
[INFO] [stderr] 291 |                     let mut ver = Arc::make_mut(self.prev_verify.as_mut().unwrap());
[INFO] [stderr]     |                         ----^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:247:25
[INFO] [stderr]     |
[INFO] [stderr] 247 |                     let mut ns = Arc::make_mut(self.prev_nameset.as_mut().unwrap());
[INFO] [stderr]     |                         ----^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:268:25
[INFO] [stderr]     |
[INFO] [stderr] 268 |                     let mut ns = Arc::make_mut(self.prev_scopes.as_mut().unwrap());
[INFO] [stderr]     |                         ----^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/database.rs:291:25
[INFO] [stderr]     |
[INFO] [stderr] 291 |                     let mut ver = Arc::make_mut(self.prev_verify.as_mut().unwrap());
[INFO] [stderr]     |                         ----^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 12.47s
[INFO] running `"docker" "inspect" "499c883144ef31ba4a35e41f119890e7dd4a627da06b47e1372bfe623f5118e1"`
[INFO] running `"docker" "rm" "-f" "499c883144ef31ba4a35e41f119890e7dd4a627da06b47e1372bfe623f5118e1"`
[INFO] [stdout] 499c883144ef31ba4a35e41f119890e7dd4a627da06b47e1372bfe623f5118e1