[INFO] fetching crate inc 0.1.3...
[INFO] checking inc-0.1.3 against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] extracting crate inc 0.1.3 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate inc 0.1.3 on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate inc 0.1.3
[INFO] finished tweaking crates.io crate inc 0.1.3
[INFO] tweaked toml for crates.io crate inc 0.1.3 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate inc 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded stackvector v1.0.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e306dad7f6a78883dea80bbfa044da0be8ce778c51b1125de06fb0089fabf0a9
[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" "e306dad7f6a78883dea80bbfa044da0be8ce778c51b1125de06fb0089fabf0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e306dad7f6a78883dea80bbfa044da0be8ce778c51b1125de06fb0089fabf0a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e306dad7f6a78883dea80bbfa044da0be8ce778c51b1125de06fb0089fabf0a9", kill_on_drop: false }`
[INFO] [stdout] e306dad7f6a78883dea80bbfa044da0be8ce778c51b1125de06fb0089fabf0a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 59edfb61946beaafc53ee1a4ec1f686557e123e77e787c7c2c7e2de5dbb33c90
[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" "59edfb61946beaafc53ee1a4ec1f686557e123e77e787c7c2c7e2de5dbb33c90", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling winapi v0.3.8
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking rgb v0.8.14
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking rand_pcg v0.1.2
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking getrandom v0.1.11
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking regex v1.3.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling nom v5.0.1
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]    Compiling stackvector v1.0.7
[INFO] [stderr]    Compiling lexical-core v0.4.3
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking cgmath v0.16.1
[INFO] [stderr]     Checking env_logger v0.6.2
[INFO] [stderr]     Checking quickcheck v0.8.5
[INFO] [stderr]     Checking winconsole v0.10.0
[INFO] [stderr]     Checking colored v1.8.0
[INFO] [stderr]    Compiling quickcheck_macros v0.8.0
[INFO] [stderr]     Checking inc v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]   --> src/lang.rs:24:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |     prog.iter().map({ |expr| lift1(s, &expr) }).collect()
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/lang.rs:130:40
[INFO] [stdout]     |
[INFO] [stdout] 130 |             let body = body.iter().map({ |b| lift1(s, b) }).collect();
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/lang.rs:135:44
[INFO] [stdout]     |
[INFO] [stdout] 135 |         List(list) => List(list.iter().map({ |l| lift1(s, l) }).collect()),
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/lang.rs:140:35
[INFO] [stdout]     |
[INFO] [stdout] 140 |             alt: alt.as_ref().map({ |box e| box lift1(s, &e) }),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/parser.rs:143:70
[INFO] [stdout]     |
[INFO] [stdout] 143 |     Ok((i, Expr::Cond { pred: box pred, then: box then, alt: alt.map({ |(_, a)| box a }) }))
[INFO] [stdout]     |                                                                      ^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/parser.rs:171:41
[INFO] [stdout]     |
[INFO] [stdout] 171 |     map(tuple((tag("\'"), identifier)), { |(_, i)| Expr::Symbol(i) })(i)
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/parser.rs:177:25
[INFO] [stdout]     |
[INFO] [stdout] 177 |         (map(tag("()"), { |_| Expr::Nil })),
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/parser.rs:308:43
[INFO] [stdout]     |
[INFO] [stdout] 308 |         preceded(tag(r"#\"), map(anychar, { |c: char| c as u8 })),
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns, box_syntax, box_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]   --> src/lang.rs:24:21
[INFO] [stdout]    |
[INFO] [stdout] 24 |     prog.iter().map({ |expr| lift1(s, &expr) }).collect()
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/lang.rs:130:40
[INFO] [stdout]     |
[INFO] [stdout] 130 |             let body = body.iter().map({ |b| lift1(s, b) }).collect();
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/lang.rs:135:44
[INFO] [stdout]     |
[INFO] [stdout] 135 |         List(list) => List(list.iter().map({ |l| lift1(s, l) }).collect()),
[INFO] [stdout]     |                                            ^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/lang.rs:140:35
[INFO] [stdout]     |
[INFO] [stdout] 140 |             alt: alt.as_ref().map({ |box e| box lift1(s, &e) }),
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around method argument
[INFO] [stdout]    --> src/parser.rs:143:70
[INFO] [stdout]     |
[INFO] [stdout] 143 |     Ok((i, Expr::Cond { pred: box pred, then: box then, alt: alt.map({ |(_, a)| box a }) }))
[INFO] [stdout]     |                                                                      ^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/parser.rs:171:41
[INFO] [stdout]     |
[INFO] [stdout] 171 |     map(tuple((tag("\'"), identifier)), { |(_, i)| Expr::Symbol(i) })(i)
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/parser.rs:177:25
[INFO] [stdout]     |
[INFO] [stdout] 177 |         (map(tag("()"), { |_| Expr::Nil })),
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/parser.rs:271:25
[INFO] [stdout]     |
[INFO] [stdout] 271 |         (map(tag("()"), { |_| Expr::Nil })),
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around function argument
[INFO] [stdout]    --> src/parser.rs:308:43
[INFO] [stdout]     |
[INFO] [stdout] 308 |         preceded(tag(r"#\"), map(anychar, { |c: char| c as u8 })),
[INFO] [stdout]     |                                           ^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `slice_patterns` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(slice_patterns, box_syntax, box_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.44s
[INFO] running `Command { std: "docker" "inspect" "59edfb61946beaafc53ee1a4ec1f686557e123e77e787c7c2c7e2de5dbb33c90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59edfb61946beaafc53ee1a4ec1f686557e123e77e787c7c2c7e2de5dbb33c90", kill_on_drop: false }`
[INFO] [stdout] 59edfb61946beaafc53ee1a4ec1f686557e123e77e787c7c2c7e2de5dbb33c90