[INFO] cloning repository https://github.com/Dustella/os-mini-lab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Dustella/os-mini-lab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDustella%2Fos-mini-lab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDustella%2Fos-mini-lab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bec469c364605d3381af98bf2d5854d175432bcf
[INFO] checking Dustella/os-mini-lab against try#a3dffdb3a32d0dedc198f9de7d43173f3eb6727b for pr-136303
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FDustella%2Fos-mini-lab" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Dustella/os-mini-lab on toolchain a3dffdb3a32d0dedc198f9de7d43173f3eb6727b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3dffdb3a32d0dedc198f9de7d43173f3eb6727b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Dustella/os-mini-lab
[INFO] finished tweaking git repo https://github.com/Dustella/os-mini-lab
[INFO] tweaked toml for git repo https://github.com/Dustella/os-mini-lab written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Dustella/os-mini-lab already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3dffdb3a32d0dedc198f9de7d43173f3eb6727b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+a3dffdb3a32d0dedc198f9de7d43173f3eb6727b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1935860b8f2b1bfb2161fabc36f7bbb021a347bc551c95d2e46e1a5f35dcc709
[INFO] running `Command { std: "docker" "start" "-a" "1935860b8f2b1bfb2161fabc36f7bbb021a347bc551c95d2e46e1a5f35dcc709", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1935860b8f2b1bfb2161fabc36f7bbb021a347bc551c95d2e46e1a5f35dcc709", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1935860b8f2b1bfb2161fabc36f7bbb021a347bc551c95d2e46e1a5f35dcc709", kill_on_drop: false }`
[INFO] [stdout] 1935860b8f2b1bfb2161fabc36f7bbb021a347bc551c95d2e46e1a5f35dcc709
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+a3dffdb3a32d0dedc198f9de7d43173f3eb6727b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09c6f22b11e565559f98cf261ff92db94db7336aa7d3112653e2e62e65d4945a
[INFO] running `Command { std: "docker" "start" "-a" "09c6f22b11e565559f98cf261ff92db94db7336aa7d3112653e2e62e65d4945a", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.103
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]    Compiling parking_lot_core v0.9.4
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stderr]     Checking futures-io v0.3.25
[INFO] [stderr]    Compiling tokio v1.21.2
[INFO] [stderr]     Checking bytes v1.2.1
[INFO] [stderr]     Checking bank v0.1.0 (/opt/rustwide/workdir/bank)
[INFO] [stdout] warning: unused variable: `init_res`
[INFO] [stdout]  --> bank/src/main.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut init_res = Resource(1, 6, 2, 2);
[INFO] [stdout]   |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_init_res`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `task_list`
[INFO] [stdout]  --> bank/src/main.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut task_list = vec![
[INFO] [stdout]   |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_task_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> bank/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut init_res = Resource(1, 6, 2, 2);
[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]  --> bank/src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut task_list = vec![
[INFO] [stdout]   |         ----^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iter` is never used
[INFO] [stdout]   --> bank/src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn iter(ls: &mut Vec<Resource>, init: &mut Resource) -> Result<(), ()> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Res` is never used
[INFO] [stdout]  --> bank/src/res.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | type Res = (usize, usize, usize, usize);
[INFO] [stdout]   |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add`, `is_safe`, and `take` are never used
[INFO] [stdout]   --> bank/src/res.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl Resource {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] 6  |     pub fn add(mut self, to_add: Resource) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 9  |     pub fn is_safe(self, res: Resource) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn take(mut self, taken: Resource) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `allocated`, and `max` are never read
[INFO] [stdout]  --> bank/src/tasks.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Task {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 4 |     pub name: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 5 |     pub allocated: Resource,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 6 |     pub max: Resource,
[INFO] [stdout]   |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_need` and `consume` are never used
[INFO] [stdout]   --> bank/src/tasks.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Task {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 10 |     fn get_need(self) -> Resource {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn consume(self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `init_res`
[INFO] [stdout]  --> bank/src/main.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut init_res = Resource(1, 6, 2, 2);
[INFO] [stdout]   |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_init_res`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `task_list`
[INFO] [stdout]  --> bank/src/main.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut task_list = vec![
[INFO] [stdout]   |             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_task_list`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> bank/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let mut init_res = Resource(1, 6, 2, 2);
[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]  --> bank/src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut task_list = vec![
[INFO] [stdout]   |         ----^^^^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `iter` is never used
[INFO] [stdout]   --> bank/src/main.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn iter(ls: &mut Vec<Resource>, init: &mut Resource) -> Result<(), ()> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Res` is never used
[INFO] [stdout]  --> bank/src/res.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | type Res = (usize, usize, usize, usize);
[INFO] [stdout]   |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add`, `is_safe`, and `take` are never used
[INFO] [stdout]   --> bank/src/res.rs:6:12
[INFO] [stdout]    |
[INFO] [stdout] 5  | impl Resource {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] 6  |     pub fn add(mut self, to_add: Resource) {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 9  |     pub fn is_safe(self, res: Resource) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn take(mut self, taken: Resource) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name`, `allocated`, and `max` are never read
[INFO] [stdout]  --> bank/src/tasks.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Task {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 4 |     pub name: String,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 5 |     pub allocated: Resource,
[INFO] [stdout]   |         ^^^^^^^^^
[INFO] [stdout] 6 |     pub max: Resource,
[INFO] [stdout]   |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_need` and `consume` are never used
[INFO] [stdout]   --> bank/src/tasks.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl Task {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 10 |     fn get_need(self) -> Resource {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn consume(self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "09c6f22b11e565559f98cf261ff92db94db7336aa7d3112653e2e62e65d4945a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09c6f22b11e565559f98cf261ff92db94db7336aa7d3112653e2e62e65d4945a", kill_on_drop: false }`
[INFO] [stdout] 09c6f22b11e565559f98cf261ff92db94db7336aa7d3112653e2e62e65d4945a
