[INFO] updating cached repository https://github.com/NicholasLYang/saber
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a21ac8b8c5cea0cc6b11a82e10171cf95b836220
[INFO] checking NicholasLYang/saber against master#30ca215b4e38b32aa7abdd635c5e2d56f5724494 for pr-66037
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicholasLYang%2Fsaber" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NicholasLYang/saber on toolchain 30ca215b4e38b32aa7abdd635c5e2d56f5724494
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/NicholasLYang/saber
[INFO] finished tweaking git repo https://github.com/NicholasLYang/saber
[INFO] tweaked toml for git repo https://github.com/NicholasLYang/saber written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/NicholasLYang/saber already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1f45a8e32b53c1e8075b93682bd282e62c723caa40a502afcb869c6ba8a31c5a
[INFO] running `"docker" "start" "-a" "1f45a8e32b53c1e8075b93682bd282e62c723caa40a502afcb869c6ba8a31c5a"`
[INFO] [stderr]    Compiling cc v1.0.22
[INFO] [stderr]     Checking strum v0.13.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.13
[INFO] [stderr]    Compiling im v13.0.0
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling syn v0.15.15
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling strum_macros v0.13.0
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking saber v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `return_type`
[INFO] [stderr]    --> src/typechecker.rs:329:47
[INFO] [stderr]     |
[INFO] [stderr] 329 |                 if let Type::Arrow(args_type, return_type) = &(*callee_type) {
[INFO] [stderr]     |                                               ^^^^^^^^^^^ help: consider prefixing with an underscore: `_return_type`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `return_type`
[INFO] [stderr]    --> src/typechecker.rs:329:47
[INFO] [stderr]     |
[INFO] [stderr] 329 |                 if let Type::Arrow(args_type, return_type) = &(*callee_type) {
[INFO] [stderr]     |                                               ^^^^^^^^^^^ help: consider prefixing with an underscore: `_return_type`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `If`
[INFO] [stderr]   --> src/ast.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     If(Expr, Box<Stmt>, Option<Box<Stmt>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Comma`
[INFO] [stderr]    --> src/ast.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 |     Comma,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidFunctionType`
[INFO] [stderr]   --> src/emitter.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     InvalidFunctionType { type_: Type },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `NotImplemented`
[INFO] [stderr]   --> src/emitter.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     NotImplemented,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Illegal`
[INFO] [stderr]  --> src/lexer.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Illegal,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `EndOfFile`
[INFO] [stderr]  --> src/lexer.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     EndOfFile,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `NotImplemented`
[INFO] [stderr]   --> src/parser.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     NotImplemented,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek`
[INFO] [stderr]    --> src/parser.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 |     fn peek(&mut self) -> Result<(), ParseError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ArityMismatch`
[INFO] [stderr]   --> src/typechecker.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     ArityMismatch { arity1: usize, arity2: usize },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Function`
[INFO] [stderr]   --> src/wasm.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     Function { type_: u32 },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Table`
[INFO] [stderr]   --> src/wasm.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     Table { type_: TableType },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Memory`
[INFO] [stderr]   --> src/wasm.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     Memory { type_: MemoryType },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Global`
[INFO] [stderr]   --> src/wasm.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     Global { type_: GlobalType },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `If`
[INFO] [stderr]   --> src/ast.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     If(Expr, Box<Stmt>, Option<Box<Stmt>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Comma`
[INFO] [stderr]    --> src/ast.rs:119:5
[INFO] [stderr]     |
[INFO] [stderr] 119 |     Comma,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `InvalidFunctionType`
[INFO] [stderr]   --> src/emitter.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     InvalidFunctionType { type_: Type },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `NotImplemented`
[INFO] [stderr]   --> src/emitter.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     NotImplemented,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Illegal`
[INFO] [stderr]  --> src/lexer.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Illegal,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `EndOfFile`
[INFO] [stderr]  --> src/lexer.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     EndOfFile,
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `NotImplemented`
[INFO] [stderr]   --> src/parser.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     NotImplemented,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `peek`
[INFO] [stderr]    --> src/parser.rs:123:5
[INFO] [stderr]     |
[INFO] [stderr] 123 |     fn peek(&mut self) -> Result<(), ParseError> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ArityMismatch`
[INFO] [stderr]   --> src/typechecker.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     ArityMismatch { arity1: usize, arity2: usize },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Function`
[INFO] [stderr]   --> src/wasm.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     Function { type_: u32 },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Table`
[INFO] [stderr]   --> src/wasm.rs:90:5
[INFO] [stderr]    |
[INFO] [stderr] 90 |     Table { type_: TableType },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Memory`
[INFO] [stderr]   --> src/wasm.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     Memory { type_: MemoryType },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Global`
[INFO] [stderr]   --> src/wasm.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     Global { type_: GlobalType },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.08s
[INFO] running `"docker" "inspect" "1f45a8e32b53c1e8075b93682bd282e62c723caa40a502afcb869c6ba8a31c5a"`
[INFO] running `"docker" "rm" "-f" "1f45a8e32b53c1e8075b93682bd282e62c723caa40a502afcb869c6ba8a31c5a"`
[INFO] [stdout] 1f45a8e32b53c1e8075b93682bd282e62c723caa40a502afcb869c6ba8a31c5a