[INFO] fetching crate mun_vfs 0.1.0...
[INFO] checking mun_vfs-0.1.0 against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] extracting crate mun_vfs 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mun_vfs 0.1.0 on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mun_vfs 0.1.0
[INFO] finished tweaking crates.io crate mun_vfs 0.1.0
[INFO] tweaked toml for crates.io crate mun_vfs 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mio v0.7.13
[INFO] [stderr]   Downloaded inotify-sys v0.1.5
[INFO] [stderr]   Downloaded filetime v0.2.14
[INFO] [stderr]   Downloaded ntapi v0.3.6
[INFO] [stderr]   Downloaded notify v5.0.0-pre.10
[INFO] [stderr]   Downloaded miow v0.3.7
[INFO] [stderr]   Downloaded relative-path v1.4.0
[INFO] [stderr]   Downloaded inotify v0.9.3
[INFO] [stderr]   Downloaded mun_paths v0.1.0
[INFO] [stderr]   Downloaded fsevent-sys v4.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3ec07f3a2dcaec08b94e3d238babd69f5410f30c5135eead4e284d9efe87291
[INFO] running `Command { std: "docker" "start" "-a" "d3ec07f3a2dcaec08b94e3d238babd69f5410f30c5135eead4e284d9efe87291", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3ec07f3a2dcaec08b94e3d238babd69f5410f30c5135eead4e284d9efe87291", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3ec07f3a2dcaec08b94e3d238babd69f5410f30c5135eead4e284d9efe87291", kill_on_drop: false }`
[INFO] [stdout] d3ec07f3a2dcaec08b94e3d238babd69f5410f30c5135eead4e284d9efe87291
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2b76040ea59978f4ea57b831bf3ce33c0b6c6fda332844658cfcd8c0cae6135f
[INFO] running `Command { std: "docker" "start" "-a" "2b76040ea59978f4ea57b831bf3ce33c0b6c6fda332844658cfcd8c0cae6135f", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking relative-path v1.4.0
[INFO] [stderr]     Checking inotify-sys v0.1.5
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]     Checking filetime v0.2.14
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking mun_paths v0.1.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking inotify v0.9.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking notify v5.0.0-pre.10
[INFO] [stderr]     Checking mun_vfs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:158:66
[INFO] [stdout]     |
[INFO] [stdout] 158 |         assert!(vfs.set_file_contents(&test_path, Some(vec![])), true);
[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] help: add a "{}" format string to Display the message
[INFO] [stdout]     |
[INFO] [stdout] 158 |         assert!(vfs.set_file_contents(&test_path, Some(vec![])), "{}", true);
[INFO] [stdout]     |                                                                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:176:67
[INFO] [stdout]     |
[INFO] [stdout] 176 |         assert!(vfs.set_file_contents(&test_path, Some(vec![0])), true);
[INFO] [stdout]     |                                                                   ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]     |
[INFO] [stdout] 176 |         assert!(vfs.set_file_contents(&test_path, Some(vec![0])), "{}", true);
[INFO] [stdout]     |                                                                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/lib.rs:179:58
[INFO] [stdout]     |
[INFO] [stdout] 179 |         assert!(vfs.set_file_contents(&test_path, None), true);
[INFO] [stdout]     |                                                          ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this is no longer accepted in Rust 2021
[INFO] [stdout] help: add a "{}" format string to Display the message
[INFO] [stdout]     |
[INFO] [stdout] 179 |         assert!(vfs.set_file_contents(&test_path, None), "{}", true);
[INFO] [stdout]     |                                                          ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.81s
[INFO] running `Command { std: "docker" "inspect" "2b76040ea59978f4ea57b831bf3ce33c0b6c6fda332844658cfcd8c0cae6135f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b76040ea59978f4ea57b831bf3ce33c0b6c6fda332844658cfcd8c0cae6135f", kill_on_drop: false }`
[INFO] [stdout] 2b76040ea59978f4ea57b831bf3ce33c0b6c6fda332844658cfcd8c0cae6135f