[INFO] cloning repository https://github.com/memoryleak47/constraint-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/memoryleak47/constraint-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoryleak47%2Fconstraint-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoryleak47%2Fconstraint-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a17e347d8fe9b30c8533ab65fc57a1288bbf5dc6
[INFO] checking memoryleak47/constraint-lang against master#5e3f1b148db5bfa27fee52464ae1f5d34c49d77b for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmemoryleak47%2Fconstraint-lang" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/memoryleak47/constraint-lang on toolchain 5e3f1b148db5bfa27fee52464ae1f5d34c49d77b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/memoryleak47/constraint-lang
[INFO] finished tweaking git repo https://github.com/memoryleak47/constraint-lang
[INFO] tweaked toml for git repo https://github.com/memoryleak47/constraint-lang written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/memoryleak47/constraint-lang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9257c74cc9ae5da8a8e73a7c9ca9a5ff4a22955709c296d11e67d9da880e88d0
[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" "9257c74cc9ae5da8a8e73a7c9ca9a5ff4a22955709c296d11e67d9da880e88d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9257c74cc9ae5da8a8e73a7c9ca9a5ff4a22955709c296d11e67d9da880e88d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9257c74cc9ae5da8a8e73a7c9ca9a5ff4a22955709c296d11e67d9da880e88d0", kill_on_drop: false }`
[INFO] [stdout] 9257c74cc9ae5da8a8e73a7c9ca9a5ff4a22955709c296d11e67d9da880e88d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+5e3f1b148db5bfa27fee52464ae1f5d34c49d77b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 713c205ce166403401c88e7d8f1857582ebeed32e49e822efcd531955ef73cab
[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" "713c205ce166403401c88e7d8f1857582ebeed32e49e822efcd531955ef73cab", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.39
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking productivity-lang-compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]    --> src/ast/mod.rs:154:2
[INFO] [stdout]     |
[INFO] [stdout] 154 |     String(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Null`
[INFO] [stdout]    --> src/ast/mod.rs:156:2
[INFO] [stdout]     |
[INFO] [stdout] 156 |     Null, // the `null` expression
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Array`
[INFO] [stdout]    --> src/ast/mod.rs:159:2
[INFO] [stdout]     |
[INFO] [stdout] 159 |     Array(Vec<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Tuple`
[INFO] [stdout]    --> src/ast/mod.rs:160:2
[INFO] [stdout]     |
[INFO] [stdout] 160 |     Tuple(Vec<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Object`
[INFO] [stdout]    --> src/ast/mod.rs:161:2
[INFO] [stdout]     |
[INFO] [stdout] 161 |     Object(HashMap<String, Box<Expr>>), // { f = 2 }
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dealloc`
[INFO] [stdout]   --> src/exec/heap.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn dealloc(&mut self, index: usize) -> Option<V> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]    --> src/ast/mod.rs:154:2
[INFO] [stdout]     |
[INFO] [stdout] 154 |     String(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Null`
[INFO] [stdout]    --> src/ast/mod.rs:156:2
[INFO] [stdout]     |
[INFO] [stdout] 156 |     Null, // the `null` expression
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Array`
[INFO] [stdout]    --> src/ast/mod.rs:159:2
[INFO] [stdout]     |
[INFO] [stdout] 159 |     Array(Vec<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Tuple`
[INFO] [stdout]    --> src/ast/mod.rs:160:2
[INFO] [stdout]     |
[INFO] [stdout] 160 |     Tuple(Vec<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Object`
[INFO] [stdout]    --> src/ast/mod.rs:161:2
[INFO] [stdout]     |
[INFO] [stdout] 161 |     Object(HashMap<String, Box<Expr>>), // { f = 2 }
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dealloc`
[INFO] [stdout]   --> src/exec/heap.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn dealloc(&mut self, index: usize) -> Option<V> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.28s
[INFO] running `Command { std: "docker" "inspect" "713c205ce166403401c88e7d8f1857582ebeed32e49e822efcd531955ef73cab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "713c205ce166403401c88e7d8f1857582ebeed32e49e822efcd531955ef73cab", kill_on_drop: false }`
[INFO] [stdout] 713c205ce166403401c88e7d8f1857582ebeed32e49e822efcd531955ef73cab