[INFO] fetching crate structdoc-derive 0.1.4...
[INFO] checking structdoc-derive-0.1.4 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate structdoc-derive 0.1.4 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate structdoc-derive 0.1.4 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate structdoc-derive 0.1.4
[INFO] finished tweaking crates.io crate structdoc-derive 0.1.4
[INFO] tweaked toml for crates.io crate structdoc-derive 0.1.4 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63f2171ebc8dd46101a350f9f8e64a6f6fd933f6818a8a34c44bc4f528a5c7e6
[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" "63f2171ebc8dd46101a350f9f8e64a6f6fd933f6818a8a34c44bc4f528a5c7e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63f2171ebc8dd46101a350f9f8e64a6f6fd933f6818a8a34c44bc4f528a5c7e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63f2171ebc8dd46101a350f9f8e64a6f6fd933f6818a8a34c44bc4f528a5c7e6", kill_on_drop: false }`
[INFO] [stdout] 63f2171ebc8dd46101a350f9f8e64a6f6fd933f6818a8a34c44bc4f528a5c7e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:ce6408862c0f4858e6cd2b85b2cf085ff7d0d6323904d0a94b71664a228554ab" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48e32f50862e5f079f4646c26d43f7504e1649ab287177f31117ff6964e17dd7
[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" "48e32f50862e5f079f4646c26d43f7504e1649ab287177f31117ff6964e17dd7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]     Checking unicode-xid v0.2.1
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling pulldown-cmark v0.4.1
[INFO] [stderr]     Checking semver-parser v0.9.0
[INFO] [stderr]     Checking unindent v0.1.7
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking proc-macro2 v1.0.24
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling structdoc-derive v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking quote v1.0.8
[INFO] [stderr]     Checking syn v1.0.60
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]     Checking version-sync v0.8.1
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]  --> tests/version.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     assert_markdown_deps_updated!("README.md");
[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: panic message is not a string literal
[INFO] [stdout]   --> tests/version.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     assert_html_root_url_updated!("src/lib.rs");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.11s
[INFO] running `Command { std: "docker" "inspect" "48e32f50862e5f079f4646c26d43f7504e1649ab287177f31117ff6964e17dd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48e32f50862e5f079f4646c26d43f7504e1649ab287177f31117ff6964e17dd7", kill_on_drop: false }`
[INFO] [stdout] 48e32f50862e5f079f4646c26d43f7504e1649ab287177f31117ff6964e17dd7