[INFO] cloning repository https://github.com/BenWiederhake/practical-floop
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BenWiederhake/practical-floop" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBenWiederhake%2Fpractical-floop", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBenWiederhake%2Fpractical-floop'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 953ecdbf4406fc4355e4d0c8ce4646053a0a4702
[INFO] checking BenWiederhake/practical-floop against master#a26e97be8826d408309fffbd8168362365719f50 for pr-136776
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBenWiederhake%2Fpractical-floop" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BenWiederhake/practical-floop on toolchain a26e97be8826d408309fffbd8168362365719f50
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BenWiederhake/practical-floop
[INFO] finished tweaking git repo https://github.com/BenWiederhake/practical-floop
[INFO] tweaked toml for git repo https://github.com/BenWiederhake/practical-floop written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/BenWiederhake/practical-floop 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" "+a26e97be8826d408309fffbd8168362365719f50" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 554bf22107eecb6f0e5dac19e3a7d073cd3ec51cbdb468c8df30143e0c5ee98e
[INFO] running `Command { std: "docker" "start" "-a" "554bf22107eecb6f0e5dac19e3a7d073cd3ec51cbdb468c8df30143e0c5ee98e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "554bf22107eecb6f0e5dac19e3a7d073cd3ec51cbdb468c8df30143e0c5ee98e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "554bf22107eecb6f0e5dac19e3a7d073cd3ec51cbdb468c8df30143e0c5ee98e", kill_on_drop: false }`
[INFO] [stdout] 554bf22107eecb6f0e5dac19e3a7d073cd3ec51cbdb468c8df30143e0c5ee98e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:3959728d45483eb673ba100a951a6b9f5012970368db2a9e08e0ac9b67c8a5ad" "/opt/rustwide/cargo-home/bin/cargo" "+a26e97be8826d408309fffbd8168362365719f50" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd046b6dbfeced74b5ec310854b77580f6daa023242266aa8c5bba09a738df3d
[INFO] running `Command { std: "docker" "start" "-a" "fd046b6dbfeced74b5ec310854b77580f6daa023242266aa8c5bba09a738df3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking practical-floop v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]    --> src/parse.rs:711:23
[INFO] [stdout]     |
[INFO] [stdout] 711 |                 Some(&(Token::End /*| Token::Else*/)) => {
[INFO] [stdout]     |                       ^          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 711 -                 Some(&(Token::End /*| Token::Else*/)) => {
[INFO] [stdout] 711 +                 Some(&Token::End) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around pattern
[INFO] [stdout]    --> src/parse.rs:711:23
[INFO] [stdout]     |
[INFO] [stdout] 711 |                 Some(&(Token::End /*| Token::Else*/)) => {
[INFO] [stdout]     |                       ^          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 711 -                 Some(&(Token::End /*| Token::Else*/)) => {
[INFO] [stdout] 711 +                 Some(&Token::End) => {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `or_patterns` has been stable since 1.53.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:32
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(int_error_matching, or_patterns)]
[INFO] [stdout]   |                                ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `int_error_matching` has been stable since 1.55.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(int_error_matching, or_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `or_patterns` has been stable since 1.53.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:32
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(int_error_matching, or_patterns)]
[INFO] [stdout]   |                                ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `int_error_matching` has been stable since 1.55.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(int_error_matching, or_patterns)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parse.rs:325:21
[INFO] [stdout]     |
[INFO] [stdout] 325 |               Join => vec![
[INFO] [stdout]     |  _____________________^
[INFO] [stdout] 326 | |                 unimplemented!(),
[INFO] [stdout]     | |                 ---------------- any code following this expression is unreachable
[INFO] [stdout] 327 | |             ],
[INFO] [stdout]     | |_____________^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/parse.rs:325:21
[INFO] [stdout]     |
[INFO] [stdout] 325 |               Join => vec![
[INFO] [stdout]     |  _____________________^
[INFO] [stdout] 326 | |                 unimplemented!(),
[INFO] [stdout]     | |                 ---------------- any code following this expression is unreachable
[INFO] [stdout] 327 | |             ],
[INFO] [stdout]     | |_____________^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `vec` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/token.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout]    |         ^^^^^^^^^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/token.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         Empty => "empty specifier".into(),
[INFO] [stdout]    |         ----- matches some of the same values
[INFO] [stdout] 13 |         InvalidDigit => format!("not a digit ({})", e),
[INFO] [stdout]    |         ------------ matches some of the same values
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         -------- matches some of the same values
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout]    |         ^^^^^^^^^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/token.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         -------- matches any value
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout] 16 |         Zero => unreachable!(),
[INFO] [stdout]    |         ^^^^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/token.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         _ => format!("unknown (BUG) ({})", e), // unfixable
[INFO] [stdout]    |         ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/token.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         Empty => "empty specifier".into(),
[INFO] [stdout]    |         ----- matches some of the same values
[INFO] [stdout] 13 |         InvalidDigit => format!("not a digit ({})", e),
[INFO] [stdout]    |         ------------ matches some of the same values
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         -------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 17 |         _ => format!("unknown (BUG) ({})", e), // unfixable
[INFO] [stdout]    |         ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Overflow`
[INFO] [stdout]   --> src/token.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Overflow`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Underflow`
[INFO] [stdout]   --> src/token.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Underflow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Overflow` should have a snake case name
[INFO] [stdout]   --> src/token.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         ^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `overflow`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Underflow` should have a snake case name
[INFO] [stdout]   --> src/token.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `underflow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/token.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout]    |         ^^^^^^^^^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/token.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         Empty => "empty specifier".into(),
[INFO] [stdout]    |         ----- matches some of the same values
[INFO] [stdout] 13 |         InvalidDigit => format!("not a digit ({})", e),
[INFO] [stdout]    |         ------------ matches some of the same values
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         -------- matches some of the same values
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout]    |         ^^^^^^^^^ collectively making this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/token.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         -------- matches any value
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout] 16 |         Zero => unreachable!(),
[INFO] [stdout]    |         ^^^^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/token.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |         _ => format!("unknown (BUG) ({})", e), // unfixable
[INFO] [stdout]    |         ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/token.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         Empty => "empty specifier".into(),
[INFO] [stdout]    |         ----- matches some of the same values
[INFO] [stdout] 13 |         InvalidDigit => format!("not a digit ({})", e),
[INFO] [stdout]    |         ------------ matches some of the same values
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         -------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 17 |         _ => format!("unknown (BUG) ({})", e), // unfixable
[INFO] [stdout]    |         ^ collectively making this unreachable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Overflow`
[INFO] [stdout]   --> src/token.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Overflow`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `Underflow`
[INFO] [stdout]   --> src/token.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_Underflow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Overflow` should have a snake case name
[INFO] [stdout]   --> src/token.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         Overflow => format!("cannot handle large naturals yet (BUG) ({})", e),
[INFO] [stdout]    |         ^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `overflow`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `Underflow` should have a snake case name
[INFO] [stdout]   --> src/token.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |         Underflow => format!("must be non-negative ({})", e),
[INFO] [stdout]    |         ^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `underflow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.07s
[INFO] running `Command { std: "docker" "inspect" "fd046b6dbfeced74b5ec310854b77580f6daa023242266aa8c5bba09a738df3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd046b6dbfeced74b5ec310854b77580f6daa023242266aa8c5bba09a738df3d", kill_on_drop: false }`
[INFO] [stdout] fd046b6dbfeced74b5ec310854b77580f6daa023242266aa8c5bba09a738df3d
