[INFO] cloning repository https://github.com/KhanhML/khanhml.github.io
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KhanhML/khanhml.github.io" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKhanhML%2Fkhanhml.github.io", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKhanhML%2Fkhanhml.github.io'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 761cc8fd3e1942d56947b35dbc0d97190a885fff
[INFO] checking KhanhML/khanhml.github.io against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKhanhML%2Fkhanhml.github.io" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
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[INFO] validating manifest of git repo https://github.com/KhanhML/khanhml.github.io on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/KhanhML/khanhml.github.io
[INFO] finished tweaking git repo https://github.com/KhanhML/khanhml.github.io
[INFO] tweaked toml for git repo https://github.com/KhanhML/khanhml.github.io written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/KhanhML/khanhml.github.io already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded memchr v2.0.1
[INFO] [stderr]   Downloaded synstructure v0.6.1
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8200afa0687e2b51855653d22fa779d7d0c0ee35ca98ce91efcd9b6f00f97a72
[INFO] running `Command { std: "docker" "start" "-a" "8200afa0687e2b51855653d22fa779d7d0c0ee35ca98ce91efcd9b6f00f97a72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8200afa0687e2b51855653d22fa779d7d0c0ee35ca98ce91efcd9b6f00f97a72", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8200afa0687e2b51855653d22fa779d7d0c0ee35ca98ce91efcd9b6f00f97a72", kill_on_drop: false }`
[INFO] [stdout] 8200afa0687e2b51855653d22fa779d7d0c0ee35ca98ce91efcd9b6f00f97a72
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83fadcce87b75b50cef1c01431a801f76336f783234c9ac9405518b7ae8ea17c
[INFO] running `Command { std: "docker" "start" "-a" "83fadcce87b75b50cef1c01431a801f76336f783234c9ac9405518b7ae8ea17c", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling cc v1.0.15
[INFO] [stderr]     Checking cfg-if v0.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking rustc-demangle v0.1.8
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]     Checking ucd-util v0.1.1
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling derive_builder v0.5.1
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking encoding_rs v0.7.2
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling proc-macro2 v0.3.8
[INFO] [stderr]    Compiling syntex_fmt_macros v0.5.0
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking regex-syntax v0.6.0
[INFO] [stderr]     Checking typed-arena v1.3.0
[INFO] [stderr]     Checking entities v1.0.1
[INFO] [stderr]     Checking unicode_categories v0.1.1
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking atty v0.2.10
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]    Compiling quote v0.5.2
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking twoway v0.1.8
[INFO] [stderr]     Checking clap v2.31.2
[INFO] [stderr]    Compiling syn v0.13.10
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling synstructure v0.6.1
[INFO] [stderr]    Compiling derive_builder_core v0.2.0
[INFO] [stderr]    Compiling pest_derive v1.0.7
[INFO] [stderr]    Compiling failure_derive v0.1.1
[INFO] [stderr]     Checking comrak v0.2.12
[INFO] [stderr]    Compiling derive-error-chain v0.11.1
[INFO] [stderr]     Checking backtrace v0.3.7
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking dotenv v0.11.0
[INFO] [stderr]     Checking quick-xml v0.12.1
[INFO] [stderr]     Checking rss v1.5.0
[INFO] [stderr]     Checking generator-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]   --> src/main.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `BufRead` is already imported here
[INFO] [stdout] 12 | use std::io::{BufRead, BufReader};
[INFO] [stdout]    |               ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufRead` is imported redundantly
[INFO] [stdout]   --> src/main.rs:12:15
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `BufRead` is already imported here
[INFO] [stdout] 12 | use std::io::{BufRead, BufReader};
[INFO] [stdout]    |               ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `domain_name`
[INFO] [stdout]    --> src/main.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let domain_name = env::var("DOMAIN_NAME").unwrap();
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_domain_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `domain_name`
[INFO] [stdout]    --> src/main.rs:166:9
[INFO] [stdout]     |
[INFO] [stdout] 166 |     let domain_name = env::var("DOMAIN_NAME").unwrap();
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_domain_name`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:277:33
[INFO] [stdout]     |
[INFO] [stdout] 277 | ...                   let mut tag_posts = shared.tags.get_mut(&format!("{}", tag)).unwrap();
[INFO] [stdout]     |                           ----^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:277:33
[INFO] [stdout]     |
[INFO] [stdout] 277 | ...                   let mut tag_posts = shared.tags.get_mut(&format!("{}", tag)).unwrap();
[INFO] [stdout]     |                           ----^^^^^^^^^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:248:5
[INFO] [stdout]     |
[INFO] [stdout] 248 |     output_file.write_all(channel.to_string().as_bytes());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |     let _ = output_file.write_all(channel.to_string().as_bytes());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:248:5
[INFO] [stdout]     |
[INFO] [stdout] 248 |     output_file.write_all(channel.to_string().as_bytes());
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 248 |     let _ = output_file.write_all(channel.to_string().as_bytes());
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.04s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: quick-xml v0.12.1, syn v0.13.10
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "83fadcce87b75b50cef1c01431a801f76336f783234c9ac9405518b7ae8ea17c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83fadcce87b75b50cef1c01431a801f76336f783234c9ac9405518b7ae8ea17c", kill_on_drop: false }`
[INFO] [stdout] 83fadcce87b75b50cef1c01431a801f76336f783234c9ac9405518b7ae8ea17c