[INFO] updating cached repository https://github.com/abhijeetbhagat/krum
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cd9af066de29ee92e754a061ce000021e720c657
[INFO] checking abhijeetbhagat/krum against try#00e4530a79c42b21a6ca2ac1edb597c90d21f89f for pr-64672
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabhijeetbhagat%2Fkrum" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/abhijeetbhagat/krum on toolchain 00e4530a79c42b21a6ca2ac1edb597c90d21f89f
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/abhijeetbhagat/krum
[INFO] finished tweaking git repo https://github.com/abhijeetbhagat/krum
[INFO] tweaked toml for git repo https://github.com/abhijeetbhagat/krum written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/abhijeetbhagat/krum already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+00e4530a79c42b21a6ca2ac1edb597c90d21f89f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] d6dd973a993f1bfee8139e8f29afae29d769a79d30f468597dd644a595ef51aa
[INFO] running `"docker" "start" "-a" "d6dd973a993f1bfee8139e8f29afae29d769a79d30f468597dd644a595ef51aa"`
[INFO] [stderr]     Checking krum v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/parser.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |           let mut exp = match self.get_cur_tok() {
[INFO] [stderr]    |  _______________________-
[INFO] [stderr] 30 | |             Token::LeftParen => {
[INFO] [stderr] 31 | |                 return Expression::Dummy
[INFO] [stderr] 32 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 42 | |             _ => return Expression::Dummy
[INFO] [stderr] 43 | |         };
[INFO] [stderr]    | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr] 44 |           return exp
[INFO] [stderr]    |           ^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `exp`
[INFO] [stderr]   --> src/parser.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut exp = match self.get_cur_tok() {
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_exp`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cur_tok_line`
[INFO] [stderr]  --> src/lexer.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     cur_tok_line : usize,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cur_tok_col`
[INFO] [stderr]  --> src/lexer.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     cur_tok_col : usize,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `src_len`
[INFO] [stderr]  --> src/lexer.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     src_len : usize,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `expression`
[INFO] [stderr]   --> src/ast.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     expression : Expression
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cur_tok`
[INFO] [stderr]  --> src/parser.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     cur_tok : Token,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_program`
[INFO] [stderr]   --> src/parser.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn parse_program(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `match_default_bindings` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(match_default_bindings)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/parser.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |           let mut exp = match self.get_cur_tok() {
[INFO] [stderr]    |  _______________________-
[INFO] [stderr] 30 | |             Token::LeftParen => {
[INFO] [stderr] 31 | |                 return Expression::Dummy
[INFO] [stderr] 32 | |             }
[INFO] [stderr] ...  |
[INFO] [stderr] 42 | |             _ => return Expression::Dummy
[INFO] [stderr] 43 | |         };
[INFO] [stderr]    | |_________- any code following this `match` expression is unreachable, as all arms diverge
[INFO] [stderr] 44 |           return exp
[INFO] [stderr]    |           ^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `exp`
[INFO] [stderr]   --> src/parser.rs:29:17
[INFO] [stderr]    |
[INFO] [stderr] 29 |         let mut exp = match self.get_cur_tok() {
[INFO] [stderr]    |                 ^^^ help: consider prefixing with an underscore: `_exp`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cur_tok_line`
[INFO] [stderr]  --> src/lexer.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     cur_tok_line : usize,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cur_tok_col`
[INFO] [stderr]  --> src/lexer.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     cur_tok_col : usize,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `src_len`
[INFO] [stderr]  --> src/lexer.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     src_len : usize,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `expression`
[INFO] [stderr]   --> src/ast.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     expression : Expression
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cur_tok`
[INFO] [stderr]  --> src/parser.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     cur_tok : Token,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `parse_program`
[INFO] [stderr]   --> src/parser.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     fn parse_program(&mut self) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `match_default_bindings` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(match_default_bindings)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.95s
[INFO] running `"docker" "inspect" "d6dd973a993f1bfee8139e8f29afae29d769a79d30f468597dd644a595ef51aa"`
[INFO] running `"docker" "rm" "-f" "d6dd973a993f1bfee8139e8f29afae29d769a79d30f468597dd644a595ef51aa"`
[INFO] [stdout] d6dd973a993f1bfee8139e8f29afae29d769a79d30f468597dd644a595ef51aa