[INFO] cloning repository https://github.com/Weltraumschaf/minivm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Weltraumschaf/minivm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeltraumschaf%2Fminivm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeltraumschaf%2Fminivm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f6257253bbca9cc6ea5f83a3c6dca902dcd1d1f6
[INFO] testing Weltraumschaf/minivm against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FWeltraumschaf%2Fminivm" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Weltraumschaf/minivm on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Weltraumschaf/minivm
[INFO] finished tweaking git repo https://github.com/Weltraumschaf/minivm
[INFO] tweaked toml for git repo https://github.com/Weltraumschaf/minivm written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Weltraumschaf/minivm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded humantime v1.1.0
[INFO] [stderr]   Downloaded env_logger v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", 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] cb2d7bd1ded0e89e334400a81f575fdef55f4eb16a4dc5ccfcf7232ac076c7e9
[INFO] running `Command { std: "docker" "start" "-a" "cb2d7bd1ded0e89e334400a81f575fdef55f4eb16a4dc5ccfcf7232ac076c7e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb2d7bd1ded0e89e334400a81f575fdef55f4eb16a4dc5ccfcf7232ac076c7e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb2d7bd1ded0e89e334400a81f575fdef55f4eb16a4dc5ccfcf7232ac076c7e9", kill_on_drop: false }`
[INFO] [stdout] cb2d7bd1ded0e89e334400a81f575fdef55f4eb16a4dc5ccfcf7232ac076c7e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f548a1b19d4ec87f20fa871f2a94c1d02922a9d1ad7c0bb1fb4a9fa2163c1f96
[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" "f548a1b19d4ec87f20fa871f2a94c1d02922a9d1ad7c0bb1fb4a9fa2163c1f96", kill_on_drop: false }`
[INFO] [stderr]    Compiling quick-error v1.2.1
[INFO] [stderr]    Compiling termcolor v0.3.5
[INFO] [stderr]    Compiling clap v2.30.0
[INFO] [stderr]    Compiling humantime v1.1.0
[INFO] [stderr]    Compiling env_logger v0.5.4
[INFO] [stderr]    Compiling minivm v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/frontend/character_helper.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         (CharacterHelper::is_alphabetic(ch) || CharacterHelper::is_numeric(ch))
[INFO] [stdout]    |         ^                                                                     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 17 -         (CharacterHelper::is_alphabetic(ch) || CharacterHelper::is_numeric(ch))
[INFO] [stdout] 17 +         CharacterHelper::is_alphabetic(ch) || CharacterHelper::is_numeric(ch)
[INFO] [stdout]    | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> src/intermediate/visitor.rs:14:36
[INFO] [stdout]    |
[INFO] [stdout] 14 |     fn visit_identifier(&mut self, n: &Identifier) -> i64 { panic!() }
[INFO] [stdout]    |                                    ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `op`
[INFO] [stdout]   --> src/intermediate/visitor.rs:27:45
[INFO] [stdout]    |
[INFO] [stdout] 27 |             Expression::BinaryOperation(ref op, ref lhs, ref rhs) => {
[INFO] [stdout]    |                                             ^^ help: if this is intentional, prefix it with an underscore: `_op`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Assignment`
[INFO] [stdout]  --> src/intermediate/ast.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Assignment(Identifier, Expression),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Constant`
[INFO] [stdout]  --> src/intermediate/ast.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Constant((Identifier, Expression)),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Variable`
[INFO] [stdout]  --> src/intermediate/ast.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Variable((Identifier, Expression)),
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Expression`
[INFO] [stdout]   --> src/intermediate/ast.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     Expression(Expression),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/intermediate/ast.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nil`
[INFO] [stdout]   --> src/intermediate/ast.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     Nil,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Integer`
[INFO] [stdout]   --> src/intermediate/ast.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Integer(i64),
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Real`
[INFO] [stdout]   --> src/intermediate/ast.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     Real(f64),
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `String`
[INFO] [stdout]   --> src/intermediate/ast.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     String(String),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Boolean`
[INFO] [stdout]   --> src/intermediate/ast.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Boolean(bool),
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BinaryOperation`
[INFO] [stdout]   --> src/intermediate/ast.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     BinaryOperation(BinaryOperator, Box<Expression>, Box<Expression>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `UnaryOperation`
[INFO] [stdout]   --> src/intermediate/ast.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     UnaryOperation(UnaryOperator, Box<Expression>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Assign`
[INFO] [stdout]   --> src/intermediate/ast.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     Assign,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Add`
[INFO] [stdout]   --> src/intermediate/ast.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 |     Add,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Subtract`
[INFO] [stdout]   --> src/intermediate/ast.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Subtract,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Multiply`
[INFO] [stdout]   --> src/intermediate/ast.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Multiply,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Divide`
[INFO] [stdout]   --> src/intermediate/ast.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     Divide,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Modulo`
[INFO] [stdout]   --> src/intermediate/ast.rs:51:5
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Modulo,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Equal`
[INFO] [stdout]   --> src/intermediate/ast.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     Equal,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `NotEqual`
[INFO] [stdout]   --> src/intermediate/ast.rs:56:5
[INFO] [stdout]    |
[INFO] [stdout] 56 |     NotEqual,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LessThan`
[INFO] [stdout]   --> src/intermediate/ast.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     LessThan,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `LessThanEqual`
[INFO] [stdout]   --> src/intermediate/ast.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     LessThanEqual,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `GreaterThan`
[INFO] [stdout]   --> src/intermediate/ast.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     GreaterThan,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `GreaterThanEqual`
[INFO] [stdout]   --> src/intermediate/ast.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     GreaterThanEqual,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `And`
[INFO] [stdout]   --> src/intermediate/ast.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 |     And,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Or`
[INFO] [stdout]   --> src/intermediate/ast.rs:69:5
[INFO] [stdout]    |
[INFO] [stdout] 69 |     Or,
[INFO] [stdout]    |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Not`
[INFO] [stdout]   --> src/intermediate/ast.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     Not,
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/backend/assembler.rs:124:29
[INFO] [stdout]     |
[INFO] [stdout] 124 |                 _ => panic!(format!("Unrecognized mnemonic '{}'!", mnemonic)),
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 124 -                 _ => panic!(format!("Unrecognized mnemonic '{}'!", mnemonic)),
[INFO] [stdout] 124 +                 _ => panic!("Unrecognized mnemonic '{}'!", mnemonic),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/frontend/lexer/number_lexer.rs:110:42
[INFO] [stdout]     |
[INFO] [stdout] 110 |                     Err(error) => panic!(format!("ERROR: {}: \"{}\"", error, literal))
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 110 -                     Err(error) => panic!(format!("ERROR: {}: \"{}\"", error, literal))
[INFO] [stdout] 110 +                     Err(error) => panic!("ERROR: {}: \"{}\"", error, literal)
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/frontend/lexer/number_lexer.rs:117:42
[INFO] [stdout]     |
[INFO] [stdout] 117 |                     Err(error) => panic!(format!("ERROR: {}: \"{}\"", error, literal))
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 117 -                     Err(error) => panic!(format!("ERROR: {}: \"{}\"", error, literal))
[INFO] [stdout] 117 +                     Err(error) => panic!("ERROR: {}: \"{}\"", error, literal)
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 34 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `minivm` due to 2 previous errors; 34 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f548a1b19d4ec87f20fa871f2a94c1d02922a9d1ad7c0bb1fb4a9fa2163c1f96", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f548a1b19d4ec87f20fa871f2a94c1d02922a9d1ad7c0bb1fb4a9fa2163c1f96", kill_on_drop: false }`
[INFO] [stdout] f548a1b19d4ec87f20fa871f2a94c1d02922a9d1ad7c0bb1fb4a9fa2163c1f96