[INFO] fetching crate mamba 0.3.0...
[INFO] checking mamba-0.3.0 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate mamba 0.3.0 into /workspace/builds/worker-79/source
[INFO] validating manifest of crates.io crate mamba 0.3.0 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mamba 0.3.0
[INFO] finished tweaking crates.io crate mamba 0.3.0
[INFO] tweaked toml for crates.io crate mamba 0.3.0 written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] crate crates.io crate mamba 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded c2-chacha v0.2.3
[INFO] [stderr]   Downloaded proc-macro2 v1.0.7
[INFO] [stderr]   Downloaded serde v1.0.104
[INFO] [stderr]   Downloaded syn v1.0.13
[INFO] [stderr]   Downloaded predicates-core v1.0.0
[INFO] [stderr]   Downloaded predicates-tree v1.0.0
[INFO] [stderr]   Downloaded serde_derive v1.0.104
[INFO] [stderr]   Downloaded serde_json v1.0.44
[INFO] [stderr]   Downloaded yaml-rust v0.3.5
[INFO] [stderr]   Downloaded ryu v1.0.2
[INFO] [stderr]   Downloaded predicates v1.0.2
[INFO] [stderr]   Downloaded hermit-abi v0.1.6
[INFO] [stderr]   Downloaded pathdiff v0.1.0
[INFO] [stderr]   Downloaded num-traits v0.2.10
[INFO] [stderr]   Downloaded nom_locate v0.3.1
[INFO] [stderr]   Downloaded bytecount v0.3.2
[INFO] [stderr]   Downloaded loggerv v0.7.2
[INFO] [stderr]   Downloaded wtf8 v0.0.3
[INFO] [stderr]   Downloaded python-parser v0.1.0
[INFO] [stderr]   Downloaded num-bigint v0.2.4
[INFO] [stderr]   Downloaded unicode_names2 v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c2160877f437fd8217ac0cefe61d2133c10aa57ffa216b2c928dda7ea5e20e70
[INFO] running `Command { std: "docker" "start" "-a" "c2160877f437fd8217ac0cefe61d2133c10aa57ffa216b2c928dda7ea5e20e70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c2160877f437fd8217ac0cefe61d2133c10aa57ffa216b2c928dda7ea5e20e70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2160877f437fd8217ac0cefe61d2133c10aa57ffa216b2c928dda7ea5e20e70", kill_on_drop: false }`
[INFO] [stdout] c2160877f437fd8217ac0cefe61d2133c10aa57ffa216b2c928dda7ea5e20e70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5ec74310b0a2551308d515be8574dd9cbdd37cf8eb3da235d654ea19ea791dc
[INFO] running `Command { std: "docker" "start" "-a" "d5ec74310b0a2551308d515be8574dd9cbdd37cf8eb3da235d654ea19ea791dc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling proc-macro2 v1.0.7
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]     Checking predicates-core v1.0.0
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking bytecount v0.3.2
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking wtf8 v0.0.3
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking unicode_names2 v0.2.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]     Checking pathdiff v0.1.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking predicates-tree v1.0.0
[INFO] [stderr]     Checking predicates v1.0.2
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking loggerv v0.7.2
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking nom_locate v0.3.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking python-parser v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking serde_json v1.0.44
[INFO] [stderr]     Checking assert_cmd v0.10.2
[INFO] [stderr]     Checking mamba v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/check/constrain/unify/expression/substitute.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |         };
[INFO] [stdout]    |          ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lex/token.rs:139:9
[INFO] [stdout]     |
[INFO] [stdout] 139 | /         (match self {
[INFO] [stdout] 140 | |             Token::Id(id) => id.len(),
[INFO] [stdout] 141 | |             Token::Real(real) => real.len(),
[INFO] [stdout] 142 | |             Token::Int(int) => int.len(),
[INFO] [stdout] ...   |
[INFO] [stdout] 148 | |             other => format!("{}", other).len()
[INFO] [stdout] 149 | |         } as i32)
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 139 ~         match self {
[INFO] [stdout] 140 +             Token::Id(id) => id.len(),
[INFO] [stdout] 141 +             Token::Real(real) => real.len(),
[INFO] [stdout] 142 +             Token::Int(int) => int.len(),
[INFO] [stdout] 143 +             Token::Bool(true) => 4,
[INFO] [stdout] 144 +             Token::Bool(false) => 5,
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/parse/definition.rs:25:6
[INFO] [stdout]    |
[INFO] [stdout] 25 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/check/constrain/unify/expression/substitute.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |         };
[INFO] [stdout]    |          ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> src/lex/token.rs:139:9
[INFO] [stdout]     |
[INFO] [stdout] 139 | /         (match self {
[INFO] [stdout] 140 | |             Token::Id(id) => id.len(),
[INFO] [stdout] 141 | |             Token::Real(real) => real.len(),
[INFO] [stdout] 142 | |             Token::Int(int) => int.len(),
[INFO] [stdout] ...   |
[INFO] [stdout] 148 | |             other => format!("{}", other).len()
[INFO] [stdout] 149 | |         } as i32)
[INFO] [stdout]     | |_________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 139 ~         match self {
[INFO] [stdout] 140 +             Token::Id(id) => id.len(),
[INFO] [stdout] 141 +             Token::Real(real) => real.len(),
[INFO] [stdout] 142 +             Token::Int(int) => int.len(),
[INFO] [stdout] 143 +             Token::Bool(true) => 4,
[INFO] [stdout] 144 +             Token::Bool(false) => 5,
[INFO] [stdout]   ...
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/parse/definition.rs:25:6
[INFO] [stdout]    |
[INFO] [stdout] 25 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::panic`
[INFO] [stdout]  --> tests/desugar/expression_and_statements.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::panic;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.77s
[INFO] running `Command { std: "docker" "inspect" "d5ec74310b0a2551308d515be8574dd9cbdd37cf8eb3da235d654ea19ea791dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5ec74310b0a2551308d515be8574dd9cbdd37cf8eb3da235d654ea19ea791dc", kill_on_drop: false }`
[INFO] [stdout] d5ec74310b0a2551308d515be8574dd9cbdd37cf8eb3da235d654ea19ea791dc