[INFO] cloning repository https://github.com/Zhihang-Liu/pure_vm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Zhihang-Liu/pure_vm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZhihang-Liu%2Fpure_vm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZhihang-Liu%2Fpure_vm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3df592d57a08a1d18a1bdc297ff663d31d062b22
[INFO] checking Zhihang-Liu/pure_vm against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZhihang-Liu%2Fpure_vm" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Zhihang-Liu/pure_vm on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Zhihang-Liu/pure_vm
[INFO] finished tweaking git repo https://github.com/Zhihang-Liu/pure_vm
[INFO] tweaked toml for git repo https://github.com/Zhihang-Liu/pure_vm written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Zhihang-Liu/pure_vm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c67ca3409331df86bedd35dbb35a1685ec2efb88f54349a28989f0491c2e940
[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" "4c67ca3409331df86bedd35dbb35a1685ec2efb88f54349a28989f0491c2e940", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c67ca3409331df86bedd35dbb35a1685ec2efb88f54349a28989f0491c2e940", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c67ca3409331df86bedd35dbb35a1685ec2efb88f54349a28989f0491c2e940", kill_on_drop: false }`
[INFO] [stdout] 4c67ca3409331df86bedd35dbb35a1685ec2efb88f54349a28989f0491c2e940
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6ac7eb39d0351c59bd2cf02700fd15565a8a9dc9e587ac372172cd8e036e0d71
[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" "6ac7eb39d0351c59bd2cf02700fd15565a8a9dc9e587ac372172cd8e036e0d71", kill_on_drop: false }`
[INFO] [stderr]     Checking pure_vm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::util::*`
[INFO] [stdout]  --> src/objects.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::util::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `PvmBaseUnit`
[INFO] [stdout]  --> src/util/base_types.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub type PvmBaseUnit= u64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `PvmInt`
[INFO] [stdout]  --> src/util/base_types.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub type PvmInt     = u64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `PvmUint`
[INFO] [stdout]  --> src/util/base_types.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub type PvmUint    = i64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `PvmFloat`
[INFO] [stdout]  --> src/util/base_types.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type PvmFloat   = f64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `PvmChar`
[INFO] [stdout]  --> src/util/base_types.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type PvmChar    = u64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PVM_BASE_UNIT_LENGTH`
[INFO] [stdout]  --> src/util/mod.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub const PVM_BASE_UNIT_LENGTH: usize = 8;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `pvm_size_of`
[INFO] [stdout]  --> src/util/mod.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn pvm_size_of<T>() -> usize {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `NonTypeUnit`
[INFO] [stdout]  --> src/objects.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | type NonTypeUnit = u64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ObjectHead`
[INFO] [stdout]  --> src/objects.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct ObjectHead {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ObjectData`
[INFO] [stdout]   --> src/objects.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct ObjectData {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ArrayData`
[INFO] [stdout]   --> src/objects.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct ArrayData {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Object`
[INFO] [stdout]   --> src/objects.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Object (ObjectHead, ObjectData);
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Array`
[INFO] [stdout]   --> src/objects.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Array  (ObjectHead,  ArrayData);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ObjectReference`
[INFO] [stdout]   --> src/objects.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct ObjectReference (* const ObjectData);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ArrayReference`
[INFO] [stdout]   --> src/objects.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct ArrayReference  (* const  ArrayData);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `nop`
[INFO] [stdout]  --> src/bytecode.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const nop: u8 = 0;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `BitCode`
[INFO] [stdout]  --> src/bytecode.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct BitCode {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `nop` should have an upper case name
[INFO] [stdout]  --> src/bytecode.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const nop: u8 = 0;
[INFO] [stdout]   |       ^^^ help: convert the identifier to upper case: `NOP`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `PvmInt`
[INFO] [stdout]  --> src/util/base_types.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub type PvmInt     = u64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `PvmFloat`
[INFO] [stdout]  --> src/util/base_types.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub type PvmFloat   = f64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `PvmChar`
[INFO] [stdout]  --> src/util/base_types.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub type PvmChar    = u64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `NonTypeUnit`
[INFO] [stdout]  --> src/objects.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | type NonTypeUnit = u64;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `lock`
[INFO] [stdout]  --> src/objects.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     lock    : PvmUint, // r/w u8
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `gc_mark`
[INFO] [stdout]  --> src/objects.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     gc_mark : PvmUint,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `item`
[INFO] [stdout]   --> src/objects.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     item: [* const PvmBaseUnit; 1],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size`
[INFO] [stdout]   --> src/objects.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     size: u64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `item`
[INFO] [stdout]   --> src/objects.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 |     item: [* const PvmBaseUnit; 1],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ObjectReference`
[INFO] [stdout]   --> src/objects.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct ObjectReference (* const ObjectData);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `ArrayReference`
[INFO] [stdout]   --> src/objects.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct ArrayReference  (* const  ArrayData);
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `nop`
[INFO] [stdout]  --> src/bytecode.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | const nop: u8 = 0;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `BitCode`
[INFO] [stdout]  --> src/bytecode.rs:9:12
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub struct BitCode {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `nop` should have an upper case name
[INFO] [stdout]  --> src/bytecode.rs:5:7
[INFO] [stdout]   |
[INFO] [stdout] 5 | const nop: u8 = 0;
[INFO] [stdout]   |       ^^^ help: convert the identifier to upper case: `NOP`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `Command { std: "docker" "inspect" "6ac7eb39d0351c59bd2cf02700fd15565a8a9dc9e587ac372172cd8e036e0d71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ac7eb39d0351c59bd2cf02700fd15565a8a9dc9e587ac372172cd8e036e0d71", kill_on_drop: false }`
[INFO] [stdout] 6ac7eb39d0351c59bd2cf02700fd15565a8a9dc9e587ac372172cd8e036e0d71