[INFO] updating cached repository https://github.com/chris-oo/crafting-interpreters-rust
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0358390d2d6489a9203e2bc16403bcb602c7a5cb
[INFO] testing chris-oo/crafting-interpreters-rust against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchris-oo%2Fcrafting-interpreters-rust" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chris-oo/crafting-interpreters-rust on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chris-oo/crafting-interpreters-rust
[INFO] finished tweaking git repo https://github.com/chris-oo/crafting-interpreters-rust
[INFO] tweaked toml for git repo https://github.com/chris-oo/crafting-interpreters-rust written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/chris-oo/crafting-interpreters-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4a7f8a65b8b147f869c6e3a89294d81e5854fdd9553643441c176f0c9a653c5
[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" "b4a7f8a65b8b147f869c6e3a89294d81e5854fdd9553643441c176f0c9a653c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4a7f8a65b8b147f869c6e3a89294d81e5854fdd9553643441c176f0c9a653c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4a7f8a65b8b147f869c6e3a89294d81e5854fdd9553643441c176f0c9a653c5", kill_on_drop: false }`
[INFO] [stdout] b4a7f8a65b8b147f869c6e3a89294d81e5854fdd9553643441c176f0c9a653c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f33dce9a14b26037052da9018551ca54a99874f50a54905ca6cf167a9bfd5b81
[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" "f33dce9a14b26037052da9018551ca54a99874f50a54905ca6cf167a9bfd5b81", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling totems v0.2.7
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling num-derive v0.3.0
[INFO] [stderr]    Compiling rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:265:26
[INFO] [stdout]     |
[INFO] [stdout] 265 |     fn number(&mut self, can_assign: bool) {
[INFO] [stdout]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:272:26
[INFO] [stdout]     |
[INFO] [stdout] 272 |     fn string(&mut self, can_assign: bool) {
[INFO] [stdout]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:315:28
[INFO] [stdout]     |
[INFO] [stdout] 315 |     fn grouping(&mut self, can_assign: bool) {
[INFO] [stdout]     |                            ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:320:25
[INFO] [stdout]     |
[INFO] [stdout] 320 |     fn unary(&mut self, can_assign: bool) {
[INFO] [stdout]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:376:26
[INFO] [stdout]     |
[INFO] [stdout] 376 |     fn binary(&mut self, can_assign: bool) {
[INFO] [stdout]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:400:27
[INFO] [stdout]     |
[INFO] [stdout] 400 |     fn literal(&mut self, can_assign: bool) {
[INFO] [stdout]     |                           ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset`
[INFO] [stdout]   --> src/chunk.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn reset(&mut 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: `remove_string`
[INFO] [stdout]    --> src/lox_string_table.rs:288:12
[INFO] [stdout]     |
[INFO] [stdout] 288 |     pub fn remove_string(&mut self, string: &LoxString) {
[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 21.56s
[INFO] running `Command { std: "docker" "inspect" "f33dce9a14b26037052da9018551ca54a99874f50a54905ca6cf167a9bfd5b81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f33dce9a14b26037052da9018551ca54a99874f50a54905ca6cf167a9bfd5b81", kill_on_drop: false }`
[INFO] [stdout] f33dce9a14b26037052da9018551ca54a99874f50a54905ca6cf167a9bfd5b81
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a91eb157cf29c6a49b9183c2defc73f04fec621d9e094c3d460ec2a395f933ca
[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" "a91eb157cf29c6a49b9183c2defc73f04fec621d9e094c3d460ec2a395f933ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling rlox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:265:26
[INFO] [stdout]     |
[INFO] [stdout] 265 |     fn number(&mut self, can_assign: bool) {
[INFO] [stdout]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:272:26
[INFO] [stdout]     |
[INFO] [stdout] 272 |     fn string(&mut self, can_assign: bool) {
[INFO] [stdout]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:315:28
[INFO] [stdout]     |
[INFO] [stdout] 315 |     fn grouping(&mut self, can_assign: bool) {
[INFO] [stdout]     |                            ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:320:25
[INFO] [stdout]     |
[INFO] [stdout] 320 |     fn unary(&mut self, can_assign: bool) {
[INFO] [stdout]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:376:26
[INFO] [stdout]     |
[INFO] [stdout] 376 |     fn binary(&mut self, can_assign: bool) {
[INFO] [stdout]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `can_assign`
[INFO] [stdout]    --> src/compiler.rs:400:27
[INFO] [stdout]     |
[INFO] [stdout] 400 |     fn literal(&mut self, can_assign: bool) {
[INFO] [stdout]     |                           ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `reset`
[INFO] [stdout]   --> src/chunk.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub fn reset(&mut self) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_check_keyword`
[INFO] [stdout]    --> src/scanner.rs:491:8
[INFO] [stdout]     |
[INFO] [stdout] 491 |     fn test_check_keyword() {}
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `keywords_test`
[INFO] [stdout]    --> src/scanner.rs:519:8
[INFO] [stdout]     |
[INFO] [stdout] 519 |     fn keywords_test() {}
[INFO] [stdout]     |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.41s
[INFO] running `Command { std: "docker" "inspect" "a91eb157cf29c6a49b9183c2defc73f04fec621d9e094c3d460ec2a395f933ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a91eb157cf29c6a49b9183c2defc73f04fec621d9e094c3d460ec2a395f933ca", kill_on_drop: false }`
[INFO] [stdout] a91eb157cf29c6a49b9183c2defc73f04fec621d9e094c3d460ec2a395f933ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1dae351dc94c8a0b6e6481b1a9f76d259cfa58c7c44bb54df8c4c6378ebdbc34
[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" "1dae351dc94c8a0b6e6481b1a9f76d259cfa58c7c44bb54df8c4c6378ebdbc34", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:265:26
[INFO] [stderr]     |
[INFO] [stderr] 265 |     fn number(&mut self, can_assign: bool) {
[INFO] [stderr]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:272:26
[INFO] [stderr]     |
[INFO] [stderr] 272 |     fn string(&mut self, can_assign: bool) {
[INFO] [stderr]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:315:28
[INFO] [stderr]     |
[INFO] [stderr] 315 |     fn grouping(&mut self, can_assign: bool) {
[INFO] [stderr]     |                            ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:320:25
[INFO] [stderr]     |
[INFO] [stderr] 320 |     fn unary(&mut self, can_assign: bool) {
[INFO] [stderr]     |                         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:376:26
[INFO] [stderr]     |
[INFO] [stderr] 376 |     fn binary(&mut self, can_assign: bool) {
[INFO] [stderr]     |                          ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `can_assign`
[INFO] [stderr]    --> src/compiler.rs:400:27
[INFO] [stderr]     |
[INFO] [stderr] 400 |     fn literal(&mut self, can_assign: bool) {
[INFO] [stderr]     |                           ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_can_assign`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `reset`
[INFO] [stderr]   --> src/chunk.rs:26:12
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn reset(&mut self) {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_check_keyword`
[INFO] [stderr]    --> src/scanner.rs:491:8
[INFO] [stderr]     |
[INFO] [stderr] 491 |     fn test_check_keyword() {}
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `keywords_test`
[INFO] [stderr]    --> src/scanner.rs:519:8
[INFO] [stderr]     |
[INFO] [stderr] 519 |     fn keywords_test() {}
[INFO] [stderr]     |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rlox-30c265d0cd2dd761
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test scanner::tests::peek_next_test ... ok
[INFO] [stdout] test lox_string_table::tests::box_allocate ... ok
[INFO] [stdout] test lox_string_table::tests::concatenate_test ... ok
[INFO] [stdout] test scanner::tests::simple_test ... ok
[INFO] [stdout] test lox_string_table::tests::basic_test ... ok
[INFO] [stdout] test scanner::tests::skip_whitespace_test ... ok
[INFO] [stdout] test lox_string_table::tests::test_remove ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1dae351dc94c8a0b6e6481b1a9f76d259cfa58c7c44bb54df8c4c6378ebdbc34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1dae351dc94c8a0b6e6481b1a9f76d259cfa58c7c44bb54df8c4c6378ebdbc34", kill_on_drop: false }`
[INFO] [stdout] 1dae351dc94c8a0b6e6481b1a9f76d259cfa58c7c44bb54df8c4c6378ebdbc34