[INFO] cloning repository https://github.com/ThePerkinrex/TestLang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ThePerkinrex/TestLang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThePerkinrex%2FTestLang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThePerkinrex%2FTestLang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 738e07cfec8e821ce0546e0ad68b0c1a1e1ba4b7
[INFO] testing ThePerkinrex/TestLang against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThePerkinrex%2FTestLang" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ThePerkinrex/TestLang on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ThePerkinrex/TestLang
[INFO] finished tweaking git repo https://github.com/ThePerkinrex/TestLang
[INFO] tweaked toml for git repo https://github.com/ThePerkinrex/TestLang written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ThePerkinrex/TestLang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-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" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dec35626eb2c2127f30ad7cc2f2ac4f1ec8c112be57192e1be2ae2451e068add
[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" "dec35626eb2c2127f30ad7cc2f2ac4f1ec8c112be57192e1be2ae2451e068add", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dec35626eb2c2127f30ad7cc2f2ac4f1ec8c112be57192e1be2ae2451e068add", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dec35626eb2c2127f30ad7cc2f2ac4f1ec8c112be57192e1be2ae2451e068add", kill_on_drop: false }`
[INFO] [stdout] dec35626eb2c2127f30ad7cc2f2ac4f1ec8c112be57192e1be2ae2451e068add
[INFO] running `Command { std: "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" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2dcf52f6974b3fea935cc263487777bc8b63fc81a1f96d6dd1f82388b702c4b
[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" "f2dcf52f6974b3fea935cc263487777bc8b63fc81a1f96d6dd1f82388b702c4b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling structopt v0.3.21
[INFO] [stderr]    Compiling lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/backend/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/backend/js.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]  --> src/backend/js.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `type_db`
[INFO] [stdout]  --> src/backend/js.rs:8:46
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_type_db`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `options`
[INFO] [stdout]  --> src/backend/js.rs:8:68
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                                                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_options`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Define`
[INFO] [stdout]   --> src/ast/expr.rs:31:2
[INFO] [stdout]    |
[INFO] [stdout] 31 |     Define(Ident, Box<Span<Expr>>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `DefineMut`
[INFO] [stdout]   --> src/ast/expr.rs:32:2
[INFO] [stdout]    |
[INFO] [stdout] 32 |     DefineMut(Ident, Box<Span<Expr>>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `map`
[INFO] [stdout]    --> src/scope.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn map<U: Clone, F: Fn(T) -> U>(mut self, f: &F) -> Scope<U> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.43s
[INFO] running `Command { std: "docker" "inspect" "f2dcf52f6974b3fea935cc263487777bc8b63fc81a1f96d6dd1f82388b702c4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2dcf52f6974b3fea935cc263487777bc8b63fc81a1f96d6dd1f82388b702c4b", kill_on_drop: false }`
[INFO] [stdout] f2dcf52f6974b3fea935cc263487777bc8b63fc81a1f96d6dd1f82388b702c4b
[INFO] running `Command { std: "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" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e42b06e357581753bcf852b36d31a74d6f599624670874d31b6100b128171c6
[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" "1e42b06e357581753bcf852b36d31a74d6f599624670874d31b6100b128171c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/backend/mod.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::PathBuf`
[INFO] [stdout]  --> src/backend/js.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::path::PathBuf;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `items`
[INFO] [stdout]  --> src/backend/js.rs:8:24
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `type_db`
[INFO] [stdout]  --> src/backend/js.rs:8:46
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_type_db`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `options`
[INFO] [stdout]  --> src/backend/js.rs:8:68
[INFO] [stdout]   |
[INFO] [stdout] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stdout]   |                                                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_options`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Define`
[INFO] [stdout]   --> src/ast/expr.rs:31:2
[INFO] [stdout]    |
[INFO] [stdout] 31 |     Define(Ident, Box<Span<Expr>>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `DefineMut`
[INFO] [stdout]   --> src/ast/expr.rs:32:2
[INFO] [stdout]    |
[INFO] [stdout] 32 |     DefineMut(Ident, Box<Span<Expr>>),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `map`
[INFO] [stdout]    --> src/scope.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |     pub fn map<U: Clone, F: Fn(T) -> U>(mut self, f: &F) -> Scope<U> {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `Command { std: "docker" "inspect" "1e42b06e357581753bcf852b36d31a74d6f599624670874d31b6100b128171c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e42b06e357581753bcf852b36d31a74d6f599624670874d31b6100b128171c6", kill_on_drop: false }`
[INFO] [stdout] 1e42b06e357581753bcf852b36d31a74d6f599624670874d31b6100b128171c6
[INFO] running `Command { std: "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" "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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", 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] c672bfe5c89012cef36289fa8993c0f32277c73de4f74d08d29514ae54d3a6c2
[INFO] running `Command { std: "docker" "start" "-a" "c672bfe5c89012cef36289fa8993c0f32277c73de4f74d08d29514ae54d3a6c2", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::path::PathBuf`
[INFO] [stderr]  --> src/backend/mod.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::path::PathBuf;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::path::PathBuf`
[INFO] [stderr]  --> src/backend/js.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::path::PathBuf;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `items`
[INFO] [stderr]  --> src/backend/js.rs:8:24
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stderr]   |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_items`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `type_db`
[INFO] [stderr]  --> src/backend/js.rs:8:46
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stderr]   |                                              ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_type_db`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `options`
[INFO] [stderr]  --> src/backend/js.rs:8:68
[INFO] [stderr]   |
[INFO] [stderr] 8 |     fn gen_code(&self, items: &[Span<Item>], type_db: &mut TypeDB, options: CodegenOptions) {
[INFO] [stderr]   |                                                                    ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_options`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Define`
[INFO] [stderr]   --> src/ast/expr.rs:31:2
[INFO] [stderr]    |
[INFO] [stderr] 31 |     Define(Ident, Box<Span<Expr>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `DefineMut`
[INFO] [stderr]   --> src/ast/expr.rs:32:2
[INFO] [stderr]    |
[INFO] [stderr] 32 |     DefineMut(Ident, Box<Span<Expr>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `map`
[INFO] [stderr]    --> src/scope.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |     pub fn map<U: Clone, F: Fn(T) -> U>(mut self, f: &F) -> Scope<U> {
[INFO] [stderr]     |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lang-5e8513817ae94f60
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c672bfe5c89012cef36289fa8993c0f32277c73de4f74d08d29514ae54d3a6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c672bfe5c89012cef36289fa8993c0f32277c73de4f74d08d29514ae54d3a6c2", kill_on_drop: false }`
[INFO] [stdout] c672bfe5c89012cef36289fa8993c0f32277c73de4f74d08d29514ae54d3a6c2