[INFO] cloning repository https://github.com/SolarLiner/mfc-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/SolarLiner/mfc-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSolarLiner%2Fmfc-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSolarLiner%2Fmfc-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b881c1af2661bc9e7b166f0e719bafa90c9076fb
[INFO] checking SolarLiner/mfc-rs against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSolarLiner%2Fmfc-rs" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SolarLiner/mfc-rs on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/SolarLiner/mfc-rs
[INFO] finished tweaking git repo https://github.com/SolarLiner/mfc-rs
[INFO] tweaked toml for git repo https://github.com/SolarLiner/mfc-rs written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/SolarLiner/mfc-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ca9fc86ef44b386ee2e0f1a42f57dec63ab7a2e54600d61bcdacb2c361c0c38
[INFO] running `Command { std: "docker" "start" "-a" "0ca9fc86ef44b386ee2e0f1a42f57dec63ab7a2e54600d61bcdacb2c361c0c38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ca9fc86ef44b386ee2e0f1a42f57dec63ab7a2e54600d61bcdacb2c361c0c38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ca9fc86ef44b386ee2e0f1a42f57dec63ab7a2e54600d61bcdacb2c361c0c38", kill_on_drop: false }`
[INFO] [stdout] 0ca9fc86ef44b386ee2e0f1a42f57dec63ab7a2e54600d61bcdacb2c361c0c38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1bca74d2dee76293b28e0064b9c579de085529376fdd17f657465c9c4b65e2bd
[INFO] running `Command { std: "docker" "start" "-a" "1bca74d2dee76293b28e0064b9c579de085529376fdd17f657465c9c4b65e2bd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking maybe-uninit v2.0.0
[INFO] [stderr]     Checking from-pest v0.3.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking smallvec v0.6.13
[INFO] [stderr]    Compiling pest_meta v2.1.2
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking smallstr v0.1.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]    Compiling backtrace v0.3.44
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling terminfo v0.6.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling pest_generator v2.1.1
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling single v1.0.0
[INFO] [stderr]    Compiling pest-ast v0.3.3
[INFO] [stderr]     Checking mortal v0.2.1
[INFO] [stderr]     Checking linefeed v0.6.0
[INFO] [stderr]     Checking mfc-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `CAst::*`
[INFO] [stdout]    --> src/parse.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 |     use CAst::*;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `CAst::*`
[INFO] [stdout]    --> src/parse.rs:152:9
[INFO] [stdout]     |
[INFO] [stdout] 152 |     use CAst::*;
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Neg`
[INFO] [stdout]   --> src/ast.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Neg,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `EUnop`
[INFO] [stdout]   --> src/ast.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     EUnop(Unop, BEAst),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lookup_full`
[INFO] [stdout]   --> src/env.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn lookup_full(&self, x: &str) -> Option<usize> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_frame`
[INFO] [stdout]   --> src/env.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn pop_frame(&mut self) -> Option<Frame> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_complete`
[INFO] [stdout]   --> src/parse.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn is_complete(input: &str) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `QUnop`
[INFO] [stdout]   --> src/quads.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     QUnop(Unop, String, String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `QSet`
[INFO] [stdout]   --> src/quads.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     QSet(String, String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `QLd`
[INFO] [stdout]   --> src/quads.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     QLd(String, String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `QPop`
[INFO] [stdout]   --> src/quads.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     QPop(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Neg`
[INFO] [stdout]   --> src/ast.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Neg,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `EUnop`
[INFO] [stdout]   --> src/ast.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     EUnop(Unop, BEAst),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `lookup_full`
[INFO] [stdout]   --> src/env.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |     pub fn lookup_full(&self, x: &str) -> Option<usize> {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pop_frame`
[INFO] [stdout]   --> src/env.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn pop_frame(&mut self) -> Option<Frame> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_complete`
[INFO] [stdout]   --> src/parse.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn is_complete(input: &str) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `QUnop`
[INFO] [stdout]   --> src/quads.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     QUnop(Unop, String, String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `QSet`
[INFO] [stdout]   --> src/quads.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     QSet(String, String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `QLd`
[INFO] [stdout]   --> src/quads.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     QLd(String, String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `QPop`
[INFO] [stdout]   --> src/quads.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 |     QPop(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.19s
[INFO] running `Command { std: "docker" "inspect" "1bca74d2dee76293b28e0064b9c579de085529376fdd17f657465c9c4b65e2bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1bca74d2dee76293b28e0064b9c579de085529376fdd17f657465c9c4b65e2bd", kill_on_drop: false }`
[INFO] [stdout] 1bca74d2dee76293b28e0064b9c579de085529376fdd17f657465c9c4b65e2bd