[INFO] cloning repository https://github.com/scole66/rust-e262
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/scole66/rust-e262" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscole66%2Frust-e262", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscole66%2Frust-e262'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d930de49bb90b8b5f98ba3cd08dc128cb05528e
[INFO] testing scole66/rust-e262 against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fscole66%2Frust-e262" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/scole66/rust-e262 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/scole66/rust-e262
[INFO] finished tweaking git repo https://github.com/scole66/rust-e262
[INFO] tweaked toml for git repo https://github.com/scole66/rust-e262 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/scole66/rust-e262 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 15327fa3936c75be139f04f5cd9ab9901e3277ebde16247119e36e3f7a212a26
[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" "15327fa3936c75be139f04f5cd9ab9901e3277ebde16247119e36e3f7a212a26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "15327fa3936c75be139f04f5cd9ab9901e3277ebde16247119e36e3f7a212a26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "15327fa3936c75be139f04f5cd9ab9901e3277ebde16247119e36e3f7a212a26", kill_on_drop: false }`
[INFO] [stdout] 15327fa3936c75be139f04f5cd9ab9901e3277ebde16247119e36e3f7a212a26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7887b857db1d5a40440a5e72ec10f6ae86b7aba93c101fb2a133022b73756f86
[INFO] running `Command { std: "docker" "start" "-a" "7887b857db1d5a40440a5e72ec10f6ae86b7aba93c101fb2a133022b73756f86", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]    Compiling cc v1.0.60
[INFO] [stderr]    Compiling rayon-core v1.8.1
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling podio v0.1.7
[INFO] [stderr]    Compiling fomat-macros v0.3.1
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling rayon v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling bstr v0.2.13
[INFO] [stderr]    Compiling quick-xml v0.18.1
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling msdos_time v0.1.6
[INFO] [stderr]    Compiling crossbeam-channel v0.4.4
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling uuid v0.8.1
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling term v0.6.1
[INFO] [stderr]    Compiling globset v0.4.5
[INFO] [stderr]    Compiling crossbeam-deque v0.7.3
[INFO] [stderr]    Compiling crossbeam v0.7.3
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-complex v0.3.0
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling chrono v0.4.15
[INFO] [stderr]    Compiling num-bigint v0.3.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling flate2 v1.0.17
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling md-5 v0.8.0
[INFO] [stderr]    Compiling zip v0.4.2
[INFO] [stderr]    Compiling simplelog v0.7.6
[INFO] [stderr]    Compiling num-rational v0.3.0
[INFO] [stderr]    Compiling num v0.3.0
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling grcov v0.5.15
[INFO] [stderr]    Compiling res v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `scanner`
[INFO] [stdout]    --> src/main.rs:317:15
[INFO] [stdout]     |
[INFO] [stdout] 317 | fn script<'a>(scanner: &'a mut Scanner) -> Result<Box<Script>, String> {
[INFO] [stdout]     |               ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scanner`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `vm`
[INFO] [stdout]    --> src/main.rs:337:14
[INFO] [stdout]     |
[INFO] [stdout] 337 | fn interpret(vm: &mut VM, source: &str) -> Result<i32, String> {
[INFO] [stdout]     |              ^^ help: if this is intentional, prefix it with an underscore: `_vm`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]    --> src/main.rs:327:17
[INFO] [stdout]     |
[INFO] [stdout] 327 |     fn generate(source: &str) -> Result<Box<AST>, String> {
[INFO] [stdout]     |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scanner`
[INFO] [stdout]     --> src/scanner/mod.rs:1433:20
[INFO] [stdout]      |
[INFO] [stdout] 1433 | fn escape_sequence(scanner: &Scanner, source: &str) -> Option<Scanner> {
[INFO] [stdout]      |                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scanner`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]     --> src/scanner/mod.rs:1433:39
[INFO] [stdout]      |
[INFO] [stdout] 1433 | fn escape_sequence(scanner: &Scanner, source: &str) -> Option<Scanner> {
[INFO] [stdout]      |                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scanner`
[INFO] [stdout]     --> src/scanner/mod.rs:1500:13
[INFO] [stdout]      |
[INFO] [stdout] 1500 | fn template(scanner: &Scanner, source: &str) -> Result<Option<(Token, Scanner)>, String> {
[INFO] [stdout]      |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scanner`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]     --> src/scanner/mod.rs:1500:32
[INFO] [stdout]      |
[INFO] [stdout] 1500 | fn template(scanner: &Scanner, source: &str) -> Result<Option<(Token, Scanner)>, String> {
[INFO] [stdout]      |                                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scanner`
[INFO] [stdout]     --> src/scanner/mod.rs:1575:5
[INFO] [stdout]      |
[INFO] [stdout] 1575 |     scanner: &Scanner,
[INFO] [stdout]      |     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scanner`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]     --> src/scanner/mod.rs:1576:5
[INFO] [stdout]      |
[INFO] [stdout] 1576 |     source: &str,
[INFO] [stdout]      |     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `goal`
[INFO] [stdout]     --> src/scanner/mod.rs:1577:5
[INFO] [stdout]      |
[INFO] [stdout] 1577 |     goal: ScanGoal,
[INFO] [stdout]      |     ^^^^ help: if this is intentional, prefix it with an underscore: `_goal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scanner`
[INFO] [stdout]     --> src/scanner/mod.rs:1582:5
[INFO] [stdout]      |
[INFO] [stdout] 1582 |     scanner: &Scanner,
[INFO] [stdout]      |     ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scanner`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `source`
[INFO] [stdout]     --> src/scanner/mod.rs:1583:5
[INFO] [stdout]      |
[INFO] [stdout] 1583 |     source: &str,
[INFO] [stdout]      |     ^^^^^^ help: if this is intentional, prefix it with an underscore: `_source`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `goal`
[INFO] [stdout]     --> src/scanner/mod.rs:1584:5
[INFO] [stdout]      |
[INFO] [stdout] 1584 |     goal: ScanGoal,
[INFO] [stdout]      |     ^^^^ help: if this is intentional, prefix it with an underscore: `_goal`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> src/main.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 | /         match self {
[INFO] [stdout] 170 | |             IdentifierReference::Identifier(id) => id.string_value(),
[INFO] [stdout] 171 | |             IdentifierReference::Yield => &scanner::JSString::from_str("yield"),
[INFO] [stdout] 172 | |             IdentifierReference::Await => &scanner::JSString::from_str("await"),
[INFO] [stdout]     | |                                            ------------------------------------ temporary value created here
[INFO] [stdout] 173 | |         }
[INFO] [stdout]     | |_________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0515]: cannot return value referencing temporary value
[INFO] [stdout]    --> src/main.rs:169:9
[INFO] [stdout]     |
[INFO] [stdout] 169 | /         match self {
[INFO] [stdout] 170 | |             IdentifierReference::Identifier(id) => id.string_value(),
[INFO] [stdout] 171 | |             IdentifierReference::Yield => &scanner::JSString::from_str("yield"),
[INFO] [stdout]     | |                                            ------------------------------------ temporary value created here
[INFO] [stdout] 172 | |             IdentifierReference::Await => &scanner::JSString::from_str("await"),
[INFO] [stdout] 173 | |         }
[INFO] [stdout]     | |_________^ returns a value referencing data owned by the current function
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0515`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `res`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "7887b857db1d5a40440a5e72ec10f6ae86b7aba93c101fb2a133022b73756f86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7887b857db1d5a40440a5e72ec10f6ae86b7aba93c101fb2a133022b73756f86", kill_on_drop: false }`
[INFO] [stdout] 7887b857db1d5a40440a5e72ec10f6ae86b7aba93c101fb2a133022b73756f86
