[INFO] fetching crate ttclient 0.2.35...
[INFO] checking ttclient-0.2.35 against try#b2f80f6008cdafc35b4472bd46afa16cc6b0cd63 for pr-79470
[INFO] extracting crate ttclient 0.2.35 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ttclient 0.2.35 on toolchain b2f80f6008cdafc35b4472bd46afa16cc6b0cd63
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ttclient 0.2.35
[INFO] finished tweaking crates.io crate ttclient 0.2.35
[INFO] tweaked toml for crates.io crate ttclient 0.2.35 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate ttclient 0.2.35 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ttrexec v0.2.34
[INFO] [stderr]   Downloaded ttcore_def v0.2.34
[INFO] [stderr]   Downloaded myutil v0.2.620
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d511c9a7f842b72d66234eaf4bef996bace37e3fba0b900ea965722335b25ba
[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" "0d511c9a7f842b72d66234eaf4bef996bace37e3fba0b900ea965722335b25ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d511c9a7f842b72d66234eaf4bef996bace37e3fba0b900ea965722335b25ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d511c9a7f842b72d66234eaf4bef996bace37e3fba0b900ea965722335b25ba", kill_on_drop: false }`
[INFO] [stdout] 0d511c9a7f842b72d66234eaf4bef996bace37e3fba0b900ea965722335b25ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b2f80f6008cdafc35b4472bd46afa16cc6b0cd63" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f76f05fbfb825562e21d593ad84a3dbad55aa86f50630b9a12def4d5a3c5b5d7
[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" "f76f05fbfb825562e21d593ad84a3dbad55aa86f50630b9a12def4d5a3c5b5d7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling const_fn v0.4.2
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling nix v0.18.0
[INFO] [stderr]    Compiling standback v0.2.11
[INFO] [stderr]    Compiling time v0.2.22
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking flate2 v1.0.18
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling time-macros-impl v0.1.1
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking myutil v0.2.620
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking ttcore_def v0.2.34
[INFO] [stderr]     Checking ttserver_def v0.2.34
[INFO] [stderr]     Checking ttrexec v0.2.34
[INFO] [stderr]     Checking ttclient v0.2.35 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/ops/env/run/ssh.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 83 | /     pnk!(
[INFO] [stdout] 84 | |         gen_interactive_cmds(&vm_conn_info)
[INFO] [stdout] 85 | |             .c(d!())
[INFO] [stdout] 86 | |             .and_then(|cmds| execv(
[INFO] [stdout] ...  |
[INFO] [stdout] 94 | |             .c(d!()))
[INFO] [stdout] 95 | |     );
[INFO] [stdout]    | |______- any code following this expression is unreachable
[INFO] [stdout] 96 | 
[INFO] [stdout] 97 |       panic!()
[INFO] [stdout]    |       ^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` 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: unreachable expression
[INFO] [stdout]   --> src/ops/env/run/ssh.rs:97:5
[INFO] [stdout]    |
[INFO] [stdout] 83 | /     pnk!(
[INFO] [stdout] 84 | |         gen_interactive_cmds(&vm_conn_info)
[INFO] [stdout] 85 | |             .c(d!())
[INFO] [stdout] 86 | |             .and_then(|cmds| execv(
[INFO] [stdout] ...  |
[INFO] [stdout] 94 | |             .c(d!()))
[INFO] [stdout] 95 | |     );
[INFO] [stdout]    | |______- any code following this expression is unreachable
[INFO] [stdout] 96 | 
[INFO] [stdout] 97 |       panic!()
[INFO] [stdout]    |       ^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` 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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 00s
[INFO] running `Command { std: "docker" "inspect" "f76f05fbfb825562e21d593ad84a3dbad55aa86f50630b9a12def4d5a3c5b5d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f76f05fbfb825562e21d593ad84a3dbad55aa86f50630b9a12def4d5a3c5b5d7", kill_on_drop: false }`
[INFO] [stdout] f76f05fbfb825562e21d593ad84a3dbad55aa86f50630b9a12def4d5a3c5b5d7