[INFO] cloning repository https://github.com/kpfromer/memory-allocator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kpfromer/memory-allocator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpfromer%2Fmemory-allocator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpfromer%2Fmemory-allocator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f679b8c235ae4a65661524eceb84bec71ade7d39
[INFO] checking kpfromer/memory-allocator against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkpfromer%2Fmemory-allocator" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kpfromer/memory-allocator
[INFO] finished tweaking git repo https://github.com/kpfromer/memory-allocator
[INFO] tweaked toml for git repo https://github.com/kpfromer/memory-allocator written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kpfromer/memory-allocator on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kpfromer/memory-allocator 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0823f610952c5d92ccaa90a963476e49541634ca60fbc445c5a7070c357c1662
[INFO] running `Command { std: "docker" "start" "-a" "0823f610952c5d92ccaa90a963476e49541634ca60fbc445c5a7070c357c1662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0823f610952c5d92ccaa90a963476e49541634ca60fbc445c5a7070c357c1662", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0823f610952c5d92ccaa90a963476e49541634ca60fbc445c5a7070c357c1662", kill_on_drop: false }`
[INFO] [stdout] 0823f610952c5d92ccaa90a963476e49541634ca60fbc445c5a7070c357c1662
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c53f9652211139b8fbe2b7c2697bd6270123168660ed15bcf4152d5d3565113b
[INFO] running `Command { std: "docker" "start" "-a" "c53f9652211139b8fbe2b7c2697bd6270123168660ed15bcf4152d5d3565113b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking terminal_size v0.1.16
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]     Checking treeline v0.1.0
[INFO] [stderr]     Checking predicates-tree v1.0.2
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking similar v1.3.0
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking predicates v1.0.7
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking serde_yaml v0.8.17
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking insta v1.7.1
[INFO] [stderr]     Checking assert_cmd v0.10.2
[INFO] [stderr]     Checking memory-allocator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `anyhow` and `bail`
[INFO] [stdout]  --> src/memory_replacement.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | use anyhow::{anyhow, bail, Result};
[INFO] [stdout]   |              ^^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MemoryReplacement` is never used
[INFO] [stdout]  --> src/memory_replacement.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait MemoryReplacement {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | /     #[structopt()]
[INFO] [stdout] 42 | |     reference_string: Vec<String>,
[INFO] [stdout]    | |_________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memory-allocator` (bin "memory-allocator") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c53f9652211139b8fbe2b7c2697bd6270123168660ed15bcf4152d5d3565113b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c53f9652211139b8fbe2b7c2697bd6270123168660ed15bcf4152d5d3565113b", kill_on_drop: false }`
[INFO] [stdout] c53f9652211139b8fbe2b7c2697bd6270123168660ed15bcf4152d5d3565113b