[INFO] cloning repository https://github.com/cronokirby/chika
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cronokirby/chika" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fchika", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fchika'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ffcedcc5e0831a2ea6fa31b92cf5218e3ee73f1b
[INFO] checking cronokirby/chika against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fchika" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cronokirby/chika on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cronokirby/chika
[INFO] finished tweaking git repo https://github.com/cronokirby/chika
[INFO] tweaked toml for git repo https://github.com/cronokirby/chika written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/cronokirby/chika already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77d14f857d91284f723144b947dcfabc8c40eb331a50682b691ee09a10598216
[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" "77d14f857d91284f723144b947dcfabc8c40eb331a50682b691ee09a10598216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77d14f857d91284f723144b947dcfabc8c40eb331a50682b691ee09a10598216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77d14f857d91284f723144b947dcfabc8c40eb331a50682b691ee09a10598216", kill_on_drop: false }`
[INFO] [stdout] 77d14f857d91284f723144b947dcfabc8c40eb331a50682b691ee09a10598216
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c76fcb46fe28c460f8471758de491adcfcc9fd1d4a1ee7e74571c82a262b8699
[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" "c76fcb46fe28c460f8471758de491adcfcc9fd1d4a1ee7e74571c82a262b8699", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking codespan-reporting v0.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking chika v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/analysis.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn new(name: StringID, return_type: BuiltinType, arg_types: Vec<BuiltinType>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/analysis.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_function`
[INFO] [stdout]   --> src/analysis.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn add_function(&mut self, function: Function) -> FunctionID {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/analysis.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn new(name: StringID, typ: BuiltinType) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/analysis.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_variable`
[INFO] [stdout]   --> src/analysis.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn add_variable(&mut self, variable: Variable) -> VariableID {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FunctionCall`
[INFO] [stdout]    --> src/analysis.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 |     FunctionCall(FunctionID, Vec<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BinExpr`
[INFO] [stdout]    --> src/analysis.rs:110:5
[INFO] [stdout]     |
[INFO] [stdout] 110 |     BinExpr(BinOp, Box<Expr>, Box<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnaryExpr`
[INFO] [stdout]    --> src/analysis.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 |     UnaryExpr(UnaryOp, Box<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `VarExpr`
[INFO] [stdout]    --> src/analysis.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 114 |     VarExpr(VariableID),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `IntExpr`
[INFO] [stdout]    --> src/analysis.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     IntExpr(u32),
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Block`
[INFO] [stdout]    --> src/analysis.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 123 |     Block(Vec<Statement>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Expr`
[INFO] [stdout]    --> src/analysis.rs:125:5
[INFO] [stdout]     |
[INFO] [stdout] 125 |     Expr(Expr),
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Return`
[INFO] [stdout]    --> src/analysis.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 127 |     Return(Expr),
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `If`
[INFO] [stdout]    --> src/analysis.rs:129:5
[INFO] [stdout]     |
[INFO] [stdout] 129 |     If(Expr, Box<Statement>, Option<Box<Statement>>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Var`
[INFO] [stdout]    --> src/analysis.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |     Var(VariableID, Expr),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/analysis.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn new(name: StringID, return_type: BuiltinType, arg_types: Vec<BuiltinType>) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/analysis.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_function`
[INFO] [stdout]   --> src/analysis.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn add_function(&mut self, function: Function) -> FunctionID {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/analysis.rs:69:8
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn new(name: StringID, typ: BuiltinType) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/analysis.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add_variable`
[INFO] [stdout]   --> src/analysis.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 |     fn add_variable(&mut self, variable: Variable) -> VariableID {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `FunctionCall`
[INFO] [stdout]    --> src/analysis.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 |     FunctionCall(FunctionID, Vec<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BinExpr`
[INFO] [stdout]    --> src/analysis.rs:110:5
[INFO] [stdout]     |
[INFO] [stdout] 110 |     BinExpr(BinOp, Box<Expr>, Box<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnaryExpr`
[INFO] [stdout]    --> src/analysis.rs:112:5
[INFO] [stdout]     |
[INFO] [stdout] 112 |     UnaryExpr(UnaryOp, Box<Expr>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `VarExpr`
[INFO] [stdout]    --> src/analysis.rs:114:5
[INFO] [stdout]     |
[INFO] [stdout] 114 |     VarExpr(VariableID),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `IntExpr`
[INFO] [stdout]    --> src/analysis.rs:116:5
[INFO] [stdout]     |
[INFO] [stdout] 116 |     IntExpr(u32),
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Block`
[INFO] [stdout]    --> src/analysis.rs:123:5
[INFO] [stdout]     |
[INFO] [stdout] 123 |     Block(Vec<Statement>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Expr`
[INFO] [stdout]    --> src/analysis.rs:125:5
[INFO] [stdout]     |
[INFO] [stdout] 125 |     Expr(Expr),
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Return`
[INFO] [stdout]    --> src/analysis.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 127 |     Return(Expr),
[INFO] [stdout]     |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `If`
[INFO] [stdout]    --> src/analysis.rs:129:5
[INFO] [stdout]     |
[INFO] [stdout] 129 |     If(Expr, Box<Statement>, Option<Box<Statement>>),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Var`
[INFO] [stdout]    --> src/analysis.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |     Var(VariableID, Expr),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.88s
[INFO] running `Command { std: "docker" "inspect" "c76fcb46fe28c460f8471758de491adcfcc9fd1d4a1ee7e74571c82a262b8699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c76fcb46fe28c460f8471758de491adcfcc9fd1d4a1ee7e74571c82a262b8699", kill_on_drop: false }`
[INFO] [stdout] c76fcb46fe28c460f8471758de491adcfcc9fd1d4a1ee7e74571c82a262b8699