[INFO] fetching crate pretty-print 0.1.9...
[INFO] checking pretty-print-0.1.9 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate pretty-print 0.1.9 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate pretty-print 0.1.9 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pretty-print 0.1.9
[INFO] finished tweaking crates.io crate pretty-print 0.1.9
[INFO] tweaked toml for crates.io crate pretty-print 0.1.9 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ae556bc07e9ed7c5c50562bf62ea6ca79daf7a0b0561118d4fa9f723b7f4623
[INFO] running `Command { std: "docker" "start" "-a" "5ae556bc07e9ed7c5c50562bf62ea6ca79daf7a0b0561118d4fa9f723b7f4623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ae556bc07e9ed7c5c50562bf62ea6ca79daf7a0b0561118d4fa9f723b7f4623", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ae556bc07e9ed7c5c50562bf62ea6ca79daf7a0b0561118d4fa9f723b7f4623", kill_on_drop: false }`
[INFO] [stdout] 5ae556bc07e9ed7c5c50562bf62ea6ca79daf7a0b0561118d4fa9f723b7f4623
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b564aaadcb7e83c1ffb4e78a01f91790bbd6306319c7f097e163ef29a5eae4a1
[INFO] running `Command { std: "docker" "start" "-a" "b564aaadcb7e83c1ffb4e78a01f91790bbd6306319c7f097e163ef29a5eae4a1", kill_on_drop: false }`
[INFO] [stderr]     Checking color-ansi v0.1.0
[INFO] [stderr]     Checking unicode-segmentation v1.12.0
[INFO] [stderr]     Checking pretty-print v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `SExp` is never used
[INFO] [stdout]  --> tests/readme.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum SExp {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `to_doc` and `to_pretty` are never used
[INFO] [stdout]   --> tests/readme.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl SExp {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 9  |     /// Return a pretty printed format of self.
[INFO] [stdout] 10 |     pub fn to_doc(&self) -> PrettyTree {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     pub fn to_pretty(&self, width: usize) -> String {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> tests/readme.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn main() {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "b564aaadcb7e83c1ffb4e78a01f91790bbd6306319c7f097e163ef29a5eae4a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b564aaadcb7e83c1ffb4e78a01f91790bbd6306319c7f097e163ef29a5eae4a1", kill_on_drop: false }`
[INFO] [stdout] b564aaadcb7e83c1ffb4e78a01f91790bbd6306319c7f097e163ef29a5eae4a1