[INFO] cloning repository https://github.com/Lukasz825700516/mcfrs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Lukasz825700516/mcfrs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLukasz825700516%2Fmcfrs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLukasz825700516%2Fmcfrs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 11bc09899c845cf3dd709ace32b2173b0255d0dc
[INFO] checking Lukasz825700516/mcfrs against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLukasz825700516%2Fmcfrs" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Lukasz825700516/mcfrs on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Lukasz825700516/mcfrs
[INFO] finished tweaking git repo https://github.com/Lukasz825700516/mcfrs
[INFO] tweaked toml for git repo https://github.com/Lukasz825700516/mcfrs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Lukasz825700516/mcfrs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f118e6d4993e331d40a280f6e4bc1b129bdb847f2ad667e1b9b4b3a054e69953
[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" "f118e6d4993e331d40a280f6e4bc1b129bdb847f2ad667e1b9b4b3a054e69953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f118e6d4993e331d40a280f6e4bc1b129bdb847f2ad667e1b9b4b3a054e69953", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f118e6d4993e331d40a280f6e4bc1b129bdb847f2ad667e1b9b4b3a054e69953", kill_on_drop: false }`
[INFO] [stdout] f118e6d4993e331d40a280f6e4bc1b129bdb847f2ad667e1b9b4b3a054e69953
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2d71b63521979538f16fcab7f30646ce23a6f1431ec17413832240f55a4d43d
[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" "f2d71b63521979538f16fcab7f30646ce23a6f1431ec17413832240f55a4d43d", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking data-encoding v2.3.2
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking sha2 v0.9.8
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking mcfrs1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/mcfrs/compiler/macro_compiler.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::{HashMap, HashSet}, iter::{Peekable, Rev, repeat}, ops::Range};
[INFO] [stdout]   |                                  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `HashSet`
[INFO] [stdout]  --> src/mcfrs/compiler/macro_compiler.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::{HashMap, HashSet}, iter::{Peekable, Rev, repeat}, ops::Range};
[INFO] [stdout]   |                                  ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sha2::digest::generic_array::sequence::Split`
[INFO] [stdout]  --> src/mcfrs/compiler/macro_compiler.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use sha2::digest::generic_array::sequence::Split;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `sha2::digest::generic_array::sequence::Split`
[INFO] [stdout]  --> src/mcfrs/compiler/macro_compiler.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use sha2::digest::generic_array::sequence::Split;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `namespace`
[INFO] [stdout]  --> src/mcfrs/compiler/macro_compiler.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     namespace: &'a Namespace<'a>,
[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: `set_reference_id`
[INFO] [stdout]   --> src/mcfrs/scope.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn set_reference_id(&mut self, id: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `namespace`
[INFO] [stdout]  --> src/mcfrs/compiler/macro_compiler.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     namespace: &'a Namespace<'a>,
[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: `set_reference_id`
[INFO] [stdout]   --> src/mcfrs/scope.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub fn set_reference_id(&mut self, id: usize) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.75s
[INFO] running `Command { std: "docker" "inspect" "f2d71b63521979538f16fcab7f30646ce23a6f1431ec17413832240f55a4d43d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2d71b63521979538f16fcab7f30646ce23a6f1431ec17413832240f55a4d43d", kill_on_drop: false }`
[INFO] [stdout] f2d71b63521979538f16fcab7f30646ce23a6f1431ec17413832240f55a4d43d