[INFO] fetching crate minimad 0.6.7...
[INFO] checking minimad-0.6.7 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate minimad 0.6.7 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate minimad 0.6.7 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate minimad 0.6.7
[INFO] finished tweaking crates.io crate minimad 0.6.7
[INFO] tweaked toml for crates.io crate minimad 0.6.7 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate minimad 0.6.7 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--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-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dcd59d1ce534e3cde4d85571c3e1f19ee6cb644763e9833780b3092ff635fdf0
[INFO] running `Command { std: "docker" "start" "-a" "dcd59d1ce534e3cde4d85571c3e1f19ee6cb644763e9833780b3092ff635fdf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcd59d1ce534e3cde4d85571c3e1f19ee6cb644763e9833780b3092ff635fdf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcd59d1ce534e3cde4d85571c3e1f19ee6cb644763e9833780b3092ff635fdf0", kill_on_drop: false }`
[INFO] [stdout] dcd59d1ce534e3cde4d85571c3e1f19ee6cb644763e9833780b3092ff635fdf0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d019aaaadca0a8bf898972a13d23e1075c106d157c22ea2666a4a8cbf1b610ec
[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" "d019aaaadca0a8bf898972a13d23e1075c106d157c22ea2666a4a8cbf1b610ec", kill_on_drop: false }`
[INFO] [stderr]     Checking minimad v0.6.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `arg_idx` is never read
[INFO] [stdout]    --> src/inline_template.rs:109:13
[INFO] [stdout]     |
[INFO] [stdout] 109 |             arg_idx += 1;
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 190 |         let composite = mad_inline!("**$1:** `$0`", "π*r²", "area");
[INFO] [stdout]     |                         ------------------------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/inline_template.rs:106:13
[INFO] [stdout]     |
[INFO] [stdout] 106 |         let mut composite = TEMPLATE.raw_composite();
[INFO] [stdout]     |             ----^^^^^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] ...
[INFO] [stdout] 178 |         let composite = mad_inline!("some `code`");
[INFO] [stdout]     |                         -------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `args`
[INFO] [stdout]   --> examples/late-composite/main.rs:38:10
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let (args, c) = lc.explode();
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_args`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/late-composite/main.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 26 |         let mut composite = self.template.raw_composite();
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `Command { std: "docker" "inspect" "d019aaaadca0a8bf898972a13d23e1075c106d157c22ea2666a4a8cbf1b610ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d019aaaadca0a8bf898972a13d23e1075c106d157c22ea2666a4a8cbf1b610ec", kill_on_drop: false }`
[INFO] [stdout] d019aaaadca0a8bf898972a13d23e1075c106d157c22ea2666a4a8cbf1b610ec