[INFO] cloning repository https://github.com/danvk/rusty-boggle
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danvk/rusty-boggle" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanvk%2Frusty-boggle", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanvk%2Frusty-boggle'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47f91bf1d06ff9abf743daac1a7dcebd4bdd226e
[INFO] building danvk/rusty-boggle against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanvk%2Frusty-boggle" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/danvk/rusty-boggle on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/danvk/rusty-boggle
[INFO] finished tweaking git repo https://github.com/danvk/rusty-boggle
[INFO] tweaked toml for git repo https://github.com/danvk/rusty-boggle written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/danvk/rusty-boggle 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8202e1b0af6a0c02276fa6b823a36bc8e38492e1907968dfb37846aa2f67ec0e
[INFO] running `Command { std: "docker" "start" "-a" "8202e1b0af6a0c02276fa6b823a36bc8e38492e1907968dfb37846aa2f67ec0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8202e1b0af6a0c02276fa6b823a36bc8e38492e1907968dfb37846aa2f67ec0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8202e1b0af6a0c02276fa6b823a36bc8e38492e1907968dfb37846aa2f67ec0e", kill_on_drop: false }`
[INFO] [stdout] 8202e1b0af6a0c02276fa6b823a36bc8e38492e1907968dfb37846aa2f67ec0e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a837dcfaaebae40cb1d4bb1073578e1f6e8140f65060a680ae643e6edd8af87
[INFO] running `Command { std: "docker" "start" "-a" "4a837dcfaaebae40cb1d4bb1073578e1f6e8140f65060a680ae643e6edd8af87", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-boggle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/trie.rs:73:45
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("Invalid letter: {i}"),
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("Invalid letter: {i}", ...),
[INFO] [stdout]    |                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("{}", "Invalid letter: {i}"),
[INFO] [stdout]    |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/trie.rs:85:45
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("Invalid letter: {i}"),
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("Invalid letter: {i}", ...),
[INFO] [stdout]    |                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("{}", "Invalid letter: {i}"),
[INFO] [stdout]    |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "4a837dcfaaebae40cb1d4bb1073578e1f6e8140f65060a680ae643e6edd8af87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a837dcfaaebae40cb1d4bb1073578e1f6e8140f65060a680ae643e6edd8af87", kill_on_drop: false }`
[INFO] [stdout] 4a837dcfaaebae40cb1d4bb1073578e1f6e8140f65060a680ae643e6edd8af87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4b9d24ea5125db68d3190fabfab5a78e804c6b900fdc1c11689a820607c8ceb
[INFO] running `Command { std: "docker" "start" "-a" "b4b9d24ea5125db68d3190fabfab5a78e804c6b900fdc1c11689a820607c8ceb", kill_on_drop: false }`
[INFO] [stderr]    Compiling rusty-boggle v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/trie.rs:73:45
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("Invalid letter: {i}"),
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("Invalid letter: {i}", ...),
[INFO] [stdout]    |                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("{}", "Invalid letter: {i}"),
[INFO] [stdout]    |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/trie.rs:85:45
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("Invalid letter: {i}"),
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("Invalid letter: {i}", ...),
[INFO] [stdout]    |                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("{}", "Invalid letter: {i}"),
[INFO] [stdout]    |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/trie.rs:73:45
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("Invalid letter: {i}"),
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("Invalid letter: {i}", ...),
[INFO] [stdout]    |                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 73 |             None => panic!("{}", "Invalid letter: {i}"),
[INFO] [stdout]    |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/trie.rs:85:45
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("Invalid letter: {i}"),
[INFO] [stdout]    |                                             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("Invalid letter: {i}", ...),
[INFO] [stdout]    |                                                 +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 85 |             None => panic!("{}", "Invalid letter: {i}"),
[INFO] [stdout]    |                            +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "b4b9d24ea5125db68d3190fabfab5a78e804c6b900fdc1c11689a820607c8ceb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4b9d24ea5125db68d3190fabfab5a78e804c6b900fdc1c11689a820607c8ceb", kill_on_drop: false }`
[INFO] [stdout] b4b9d24ea5125db68d3190fabfab5a78e804c6b900fdc1c11689a820607c8ceb