[INFO] cloning repository https://github.com/monte-language/rum
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/monte-language/rum" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmonte-language%2Frum", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmonte-language%2Frum'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab3ad785838f46a867b49d0e41280befd1d3a5bd
[INFO] checking monte-language/rum against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmonte-language%2Frum" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/monte-language/rum on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/monte-language/rum
[INFO] finished tweaking git repo https://github.com/monte-language/rum
[INFO] tweaked toml for git repo https://github.com/monte-language/rum written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/monte-language/rum already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bincode v0.6.0
[INFO] [stderr]   Downloaded serde v0.8.19
[INFO] [stderr]   Downloaded strsim v0.5.2
[INFO] [stderr]   Downloaded libc v0.2.18
[INFO] [stderr]   Downloaded docopt v0.6.86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7e920226f189efa7a3ce428de765e0efc981c27059ed2e880250fc96f086330
[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" "d7e920226f189efa7a3ce428de765e0efc981c27059ed2e880250fc96f086330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7e920226f189efa7a3ce428de765e0efc981c27059ed2e880250fc96f086330", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7e920226f189efa7a3ce428de765e0efc981c27059ed2e880250fc96f086330", kill_on_drop: false }`
[INFO] [stdout] d7e920226f189efa7a3ce428de765e0efc981c27059ed2e880250fc96f086330
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d7e449c6627595d45c64b3577782098566883f1eaf7aef3b5452fd6ceab9b63
[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" "3d7e449c6627595d45c64b3577782098566883f1eaf7aef3b5452fd6ceab9b63", kill_on_drop: false }`
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking serde v0.8.19
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]     Checking num-complex v0.1.35
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking num-bigint v0.1.35
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking num-rational v0.1.35
[INFO] [stderr]     Checking num v0.1.36
[INFO] [stderr]     Checking bincode v0.6.0
[INFO] [stderr]     Checking docopt v0.6.86
[INFO] [stderr]     Checking rum v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:117:46
[INFO] [stdout]     |
[INFO] [stdout] 117 |     fn expr_at(&mut self, idx: usize) -> Arc<Expr>;
[INFO] [stdout]     |                                              ^^^^ help: use `dyn`: `dyn Expr`
[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/load_mast.rs:118:47
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn new(n: bool, stream: Arc<BufReader<Box<Read>>>) -> Context;
[INFO] [stdout]     |                                               ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:125:17
[INFO] [stdout]     |
[INFO] [stdout] 125 |     stream: Arc<MastReader>,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: use `dyn`: `dyn MastReader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:126:25
[INFO] [stdout]     |
[INFO] [stdout] 126 |     expers: Arc<Vec<Arc<Expr>>>,
[INFO] [stdout]     |                         ^^^^ help: use `dyn`: `dyn Expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:131:47
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn new(n: bool, stream: Arc<BufReader<Box<Read>>>) -> Context {
[INFO] [stdout]     |                                               ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:134:35
[INFO] [stdout]     |
[INFO] [stdout] 134 |             stream: stream as Arc<MastReader>,
[INFO] [stdout]     |                                   ^^^^^^^^^^ help: use `dyn`: `dyn MastReader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:140:48
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn expr_at(&mut self, index: usize) -> Arc<Expr> {
[INFO] [stdout]     |                                                ^^^^ help: use `dyn`: `dyn Expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:246:37
[INFO] [stdout]     |
[INFO] [stdout] 246 | pub fn load(file: Arc<BufReader<Box<Read>>>) {
[INFO] [stdout]     |                                     ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:40:50
[INFO] [stdout]    |
[INFO] [stdout] 40 |             let i = Box::new(io::stdin()) as Box<Read>;
[INFO] [stdout]    |                                                  ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:44:62
[INFO] [stdout]    |
[INFO] [stdout] 44 |             let i = Box::new(File::open(&p).unwrap()) as Box<Read>;
[INFO] [stdout]    |                                                              ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:117:46
[INFO] [stdout]     |
[INFO] [stdout] 117 |     fn expr_at(&mut self, idx: usize) -> Arc<Expr>;
[INFO] [stdout]     |                                              ^^^^ help: use `dyn`: `dyn Expr`
[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/load_mast.rs:118:47
[INFO] [stdout]     |
[INFO] [stdout] 118 |     fn new(n: bool, stream: Arc<BufReader<Box<Read>>>) -> Context;
[INFO] [stdout]     |                                               ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:125:17
[INFO] [stdout]     |
[INFO] [stdout] 125 |     stream: Arc<MastReader>,
[INFO] [stdout]     |                 ^^^^^^^^^^ help: use `dyn`: `dyn MastReader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:126:25
[INFO] [stdout]     |
[INFO] [stdout] 126 |     expers: Arc<Vec<Arc<Expr>>>,
[INFO] [stdout]     |                         ^^^^ help: use `dyn`: `dyn Expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:131:47
[INFO] [stdout]     |
[INFO] [stdout] 131 |     fn new(n: bool, stream: Arc<BufReader<Box<Read>>>) -> Context {
[INFO] [stdout]     |                                               ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:134:35
[INFO] [stdout]     |
[INFO] [stdout] 134 |             stream: stream as Arc<MastReader>,
[INFO] [stdout]     |                                   ^^^^^^^^^^ help: use `dyn`: `dyn MastReader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:140:48
[INFO] [stdout]     |
[INFO] [stdout] 140 |     fn expr_at(&mut self, index: usize) -> Arc<Expr> {
[INFO] [stdout]     |                                                ^^^^ help: use `dyn`: `dyn Expr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/load_mast.rs:246:37
[INFO] [stdout]     |
[INFO] [stdout] 246 | pub fn load(file: Arc<BufReader<Box<Read>>>) {
[INFO] [stdout]     |                                     ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:40:50
[INFO] [stdout]    |
[INFO] [stdout] 40 |             let i = Box::new(io::stdin()) as Box<Read>;
[INFO] [stdout]    |                                                  ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:44:62
[INFO] [stdout]    |
[INFO] [stdout] 44 |             let i = Box::new(File::open(&p).unwrap()) as Box<Read>;
[INFO] [stdout]    |                                                              ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 |     load_mast::load(mast_reader);
[INFO] [stdout]    |                     ^^^^^^^^^^^ expected struct `Arc`, found struct `Box`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Arc<BufReader<Box<(dyn std::io::Read + 'static)>>>`
[INFO] [stdout]               found struct `Box<BufReader<Box<dyn std::io::Read>>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 |     load_mast::load(mast_reader);
[INFO] [stdout]    |                     ^^^^^^^^^^^ expected struct `Arc`, found struct `Box`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `Arc<BufReader<Box<(dyn std::io::Read + 'static)>>>`
[INFO] [stdout]               found struct `Box<BufReader<Box<dyn std::io::Read>>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rum`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3d7e449c6627595d45c64b3577782098566883f1eaf7aef3b5452fd6ceab9b63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d7e449c6627595d45c64b3577782098566883f1eaf7aef3b5452fd6ceab9b63", kill_on_drop: false }`
[INFO] [stdout] 3d7e449c6627595d45c64b3577782098566883f1eaf7aef3b5452fd6ceab9b63