[INFO] fetching crate rexpect 0.4.0...
[INFO] checking rexpect-0.4.0 against master#3e826bb11228508fbe749e594038d6727208aa94 for pr-82322
[INFO] extracting crate rexpect 0.4.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate rexpect 0.4.0 on toolchain 3e826bb11228508fbe749e594038d6727208aa94
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e826bb11228508fbe749e594038d6727208aa94" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rexpect 0.4.0
[INFO] finished tweaking crates.io crate rexpect 0.4.0
[INFO] tweaked toml for crates.io crate rexpect 0.4.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate crates.io crate rexpect 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e826bb11228508fbe749e594038d6727208aa94" "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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+3e826bb11228508fbe749e594038d6727208aa94" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1343e678855d11b4fe8fe100ea1d358abf6e6990252962a35331daa18bf99e73
[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" "1343e678855d11b4fe8fe100ea1d358abf6e6990252962a35331daa18bf99e73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1343e678855d11b4fe8fe100ea1d358abf6e6990252962a35331daa18bf99e73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1343e678855d11b4fe8fe100ea1d358abf6e6990252962a35331daa18bf99e73", kill_on_drop: false }`
[INFO] [stdout] 1343e678855d11b4fe8fe100ea1d358abf6e6990252962a35331daa18bf99e73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+3e826bb11228508fbe749e594038d6727208aa94" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 94047b7537becb0b59c5f07cf6b712de7532a48b4cc35c9e0efb8dc70397d850
[INFO] running `Command { std: "docker" "start" "-a" "94047b7537becb0b59c5f07cf6b712de7532a48b4cc35c9e0efb8dc70397d850", kill_on_drop: false }`
[INFO] [stderr]     Checking spin v0.5.0
[INFO] [stderr]    Compiling cc v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]     Checking ucd-util v0.1.3
[INFO] [stderr]    Compiling regex v1.1.9
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]     Checking utf8-ranges v1.0.3
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking regex-syntax v0.6.8
[INFO] [stderr]     Checking getrandom v0.1.6
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]    Compiling error-chain v0.12.1
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.14
[INFO] [stderr]     Checking aho-corasick v0.7.4
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking backtrace v0.3.3
[INFO] [stderr]     Checking rexpect v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/session.rs:519:42
[INFO] [stdout]     |
[INFO] [stdout] 519 |                 Err(e) => assert!(false, format!("got error: {}", e)),
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.33s
[INFO] running `Command { std: "docker" "inspect" "94047b7537becb0b59c5f07cf6b712de7532a48b4cc35c9e0efb8dc70397d850", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94047b7537becb0b59c5f07cf6b712de7532a48b4cc35c9e0efb8dc70397d850", kill_on_drop: false }`
[INFO] [stdout] 94047b7537becb0b59c5f07cf6b712de7532a48b4cc35c9e0efb8dc70397d850