[INFO] fetching crate indextreemap 0.1.23...
[INFO] checking indextreemap-0.1.23 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate indextreemap 0.1.23 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate indextreemap 0.1.23 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate indextreemap 0.1.23
[INFO] finished tweaking crates.io crate indextreemap 0.1.23
[INFO] tweaked toml for crates.io crate indextreemap 0.1.23 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d318ce819c14707b179632c976accb2daba6aa9f69a7dcac01f979edaee3bf8
[INFO] running `Command { std: "docker" "start" "-a" "5d318ce819c14707b179632c976accb2daba6aa9f69a7dcac01f979edaee3bf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d318ce819c14707b179632c976accb2daba6aa9f69a7dcac01f979edaee3bf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d318ce819c14707b179632c976accb2daba6aa9f69a7dcac01f979edaee3bf8", kill_on_drop: false }`
[INFO] [stdout] 5d318ce819c14707b179632c976accb2daba6aa9f69a7dcac01f979edaee3bf8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fafdf0f43782899d7b0350e6d25b5145253ea7adc94ddb7e751e16189d339b14
[INFO] running `Command { std: "docker" "start" "-a" "fafdf0f43782899d7b0350e6d25b5145253ea7adc94ddb7e751e16189d339b14", kill_on_drop: false }`
[INFO] [stderr]    Compiling cpp_demangle v0.4.3
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[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/methods/split.rs:94:29
[INFO] [stdout]    |
[INFO] [stdout] 94 |                         let mut pointer = self.pointers[loc].as_mut().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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stdout] warning: the item `indextreemap` is imported redundantly
[INFO] [stdout]  --> benches/benches.rs:4:20
[INFO] [stdout]   |
[INFO] [stdout] 4 | use indextreemap::{self, IndexTreeMap};
[INFO] [stdout]   |                    ^^^^ the item `indextreemap` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/methods/split.rs:94:29
[INFO] [stdout]    |
[INFO] [stdout] 94 |                         let mut pointer = self.pointers[loc].as_mut().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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.13s
[INFO] running `Command { std: "docker" "inspect" "fafdf0f43782899d7b0350e6d25b5145253ea7adc94ddb7e751e16189d339b14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fafdf0f43782899d7b0350e6d25b5145253ea7adc94ddb7e751e16189d339b14", kill_on_drop: false }`
[INFO] [stdout] fafdf0f43782899d7b0350e6d25b5145253ea7adc94ddb7e751e16189d339b14