[INFO] cloning repository https://github.com/j16r/virtual68
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/j16r/virtual68" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj16r%2Fvirtual68", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj16r%2Fvirtual68'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d6049874ca9e2565cb666b61d6c9f5cf01f8994e
[INFO] checking j16r/virtual68 against try#169954edd744527414c631e9af1bbdc537b0cdf2 for pr-75192
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fj16r%2Fvirtual68" "/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/j16r/virtual68 on toolchain 169954edd744527414c631e9af1bbdc537b0cdf2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/j16r/virtual68
[INFO] finished tweaking git repo https://github.com/j16r/virtual68
[INFO] tweaked toml for git repo https://github.com/j16r/virtual68 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/j16r/virtual68 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded combine v1.3.0
[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" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "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] 14b2a70cc67aadabfe826b2e9f2f020eaeba2e61ba57a1c66096378ad63d3dcc
[INFO] running `Command { std: "docker" "start" "-a" "14b2a70cc67aadabfe826b2e9f2f020eaeba2e61ba57a1c66096378ad63d3dcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "14b2a70cc67aadabfe826b2e9f2f020eaeba2e61ba57a1c66096378ad63d3dcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14b2a70cc67aadabfe826b2e9f2f020eaeba2e61ba57a1c66096378ad63d3dcc", kill_on_drop: false }`
[INFO] [stdout] 14b2a70cc67aadabfe826b2e9f2f020eaeba2e61ba57a1c66096378ad63d3dcc
[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=forbid" "-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:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+169954edd744527414c631e9af1bbdc537b0cdf2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 521f29b3247ff812fcbb3521620a929189de677f1625a00bc111fecf6e1d59fd
[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" "521f29b3247ff812fcbb3521620a929189de677f1625a00bc111fecf6e1d59fd", kill_on_drop: false }`
[INFO] [stderr]     Checking combine v1.3.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking virtual68 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/linker.rs:95:21
[INFO] [stdout]    |
[INFO] [stdout] 95 |                 let mut opcode = opcode(command);
[INFO] [stdout]    |                     ----^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/linker.rs:116:21
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 let mut opcode = opcode(command);
[INFO] [stdout]     |                     ----^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/linker.rs:95:21
[INFO] [stdout]    |
[INFO] [stdout] 95 |                 let mut opcode = opcode(command);
[INFO] [stdout]    |                     ----^^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/linker.rs:116:21
[INFO] [stdout]     |
[INFO] [stdout] 116 |                 let mut opcode = opcode(command);
[INFO] [stdout]     |                     ----^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/linker.rs:158:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |         let mut program = Program::new();
[INFO] [stdout]     |             ----^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_decimal`
[INFO] [stdout]  --> src/grammar.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn is_decimal(input: &str) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_decimal`
[INFO] [stdout]  --> src/grammar.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn is_decimal(input: &str) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.70s
[INFO] running `Command { std: "docker" "inspect" "521f29b3247ff812fcbb3521620a929189de677f1625a00bc111fecf6e1d59fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "521f29b3247ff812fcbb3521620a929189de677f1625a00bc111fecf6e1d59fd", kill_on_drop: false }`
[INFO] [stdout] 521f29b3247ff812fcbb3521620a929189de677f1625a00bc111fecf6e1d59fd