[INFO] cloning repository https://github.com/playXE/runtime
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/playXE/runtime" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FplayXE%2Fruntime", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FplayXE%2Fruntime'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4df148d809d63416d585d37d41a4ec3b09079e29
[INFO] checking playXE/runtime against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FplayXE%2Fruntime" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/playXE/runtime on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/playXE/runtime
[INFO] finished tweaking git repo https://github.com/playXE/runtime
[INFO] tweaked toml for git repo https://github.com/playXE/runtime written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/playXE/runtime already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d52f730fc5664bead3fd9ad58bf79ef32fca3080b1ff32b0c3219816316494ba
[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" "d52f730fc5664bead3fd9ad58bf79ef32fca3080b1ff32b0c3219816316494ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d52f730fc5664bead3fd9ad58bf79ef32fca3080b1ff32b0c3219816316494ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d52f730fc5664bead3fd9ad58bf79ef32fca3080b1ff32b0c3219816316494ba", kill_on_drop: false }`
[INFO] [stdout] d52f730fc5664bead3fd9ad58bf79ef32fca3080b1ff32b0c3219816316494ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03b84e46b6129d1a3900324ecc2d12183d066a609f1c7c411d68304ab12aa55f
[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" "03b84e46b6129d1a3900324ecc2d12183d066a609f1c7c411d68304ab12aa55f", kill_on_drop: false }`
[INFO] [stderr]     Checking runtime v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::cycleanalysis::*`
[INFO] [stdout]  --> src/analysis/hammockgraph.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::cycleanalysis::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::cfg::*`
[INFO] [stdout]  --> src/analysis/saferegion.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::cfg::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::cycleanalysis::*`
[INFO] [stdout]  --> src/analysis/hammockgraph.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use super::cycleanalysis::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::cfg::*`
[INFO] [stdout]  --> src/analysis/saferegion.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::cfg::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/analysis/hammockgraph.rs:146:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |         let mut new_hammock = unvisited.get(&entry).cloned().unwrap();
[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/analysis/hammockgraph.rs:155:17
[INFO] [stdout]     |
[INFO] [stdout] 155 |             let mut v: Rc<RefCell<Hammock>> = v.clone();
[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/analysis/hammockgraph.rs:146:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |         let mut new_hammock = unvisited.get(&entry).cloned().unwrap();
[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/analysis/hammockgraph.rs:155:17
[INFO] [stdout]     |
[INFO] [stdout] 155 |             let mut v: Rc<RefCell<Hammock>> = v.clone();
[INFO] [stdout]     |                 ----^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cfg`
[INFO] [stdout]  --> src/analysis/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     cfg: &'a crate::cfg::ControlFlowGraph,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dom`
[INFO] [stdout]  --> src/analysis/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     dom: Option<dom::DominatorTree>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `post_dom`
[INFO] [stdout]   --> src/analysis/mod.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     post_dom: Option<postdom::PostDominatorTree>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cycle`
[INFO] [stdout]   --> src/analysis/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     cycle: Option<cycleanalysis::CycleAnalysis>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hammockgraph`
[INFO] [stdout]   --> src/analysis/mod.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     hammockgraph: Option<hammockgraph::HammockAnalysis>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `saferegion`
[INFO] [stdout]   --> src/analysis/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     saferegion: Option<saferegion::SafeRegionAnalysis>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cfg`
[INFO] [stdout]  --> src/analysis/mod.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     cfg: &'a crate::cfg::ControlFlowGraph,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dom`
[INFO] [stdout]  --> src/analysis/mod.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     dom: Option<dom::DominatorTree>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `post_dom`
[INFO] [stdout]   --> src/analysis/mod.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     post_dom: Option<postdom::PostDominatorTree>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cycle`
[INFO] [stdout]   --> src/analysis/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     cycle: Option<cycleanalysis::CycleAnalysis>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `hammockgraph`
[INFO] [stdout]   --> src/analysis/mod.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     hammockgraph: Option<hammockgraph::HammockAnalysis>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `saferegion`
[INFO] [stdout]   --> src/analysis/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     saferegion: Option<saferegion::SafeRegionAnalysis>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut b2 = cfg.insert_block(CodeBlockRef::new(block));
[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/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut b2 = cfg.insert_block(CodeBlockRef::new(block));
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "03b84e46b6129d1a3900324ecc2d12183d066a609f1c7c411d68304ab12aa55f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03b84e46b6129d1a3900324ecc2d12183d066a609f1c7c411d68304ab12aa55f", kill_on_drop: false }`
[INFO] [stdout] 03b84e46b6129d1a3900324ecc2d12183d066a609f1c7c411d68304ab12aa55f