[INFO] cloning repository https://github.com/violetdivine/supplement_p2_6
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/violetdivine/supplement_p2_6" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvioletdivine%2Fsupplement_p2_6", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvioletdivine%2Fsupplement_p2_6'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 947cbfade2673262a1d4d7f8c78202739c7f20a8
[INFO] testing violetdivine/supplement_p2_6 against 1.98.0-beta.8+cargoflags=--release for beta-release-1.99-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvioletdivine%2Fsupplement_p2_6" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/violetdivine/supplement_p2_6
[INFO] finished tweaking git repo https://github.com/violetdivine/supplement_p2_6
[INFO] tweaked toml for git repo https://github.com/violetdivine/supplement_p2_6 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/violetdivine/supplement_p2_6 on toolchain 1.98.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.98.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/violetdivine/supplement_p2_6 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" "+1.98.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235
[INFO] running `Command { std: "docker" "start" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling supplement_p2_6 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `is_palindrome`, `most_common_char`, and `reverse_string`
[INFO] [stdout]  --> src/test.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{is_palindrome, reverse_string, most_common_char};
[INFO] [stdout]   |             ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | mod test;
[INFO] [stdout]   | ^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/lib2.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling supplement_p2_6 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `is_palindrome`, `most_common_char`, and `reverse_string`
[INFO] [stdout]  --> src/test.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::{is_palindrome, reverse_string, most_common_char};
[INFO] [stdout]   |             ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]  --> src/lib.rs:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | mod test;
[INFO] [stdout]   | ^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/lib2.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/lib2.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main(){
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.8" "test" "--frozen" "--release", kill_on_drop: false }`
[INFO] [stderr] warning: unused imports: `is_palindrome`, `most_common_char`, and `reverse_string`
[INFO] [stderr]  --> src/test.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::{is_palindrome, reverse_string, most_common_char};
[INFO] [stderr]   |             ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: if this is a test module, consider adding a `#[cfg(test)]` to the containing module
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | mod test;
[INFO] [stderr]   | ^^^^^^^^^
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `main` is never used
[INFO] [stderr]  --> src/lib2.rs:6:4
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn main(){
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `supplement_p2_6` (lib) generated 2 warnings (run `cargo fix --lib -p supplement_p2_6` to apply 1 suggestion)
[INFO] [stderr] warning: `supplement_p2_6` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/release/deps/supplement_p2_6-a2720a60099e7ce6)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test::should_test_reversing_a_string ... ok
[INFO] [stdout] test test::should_test_if_string_is_a_palindrome ... ok
[INFO] [stdout] test test::should_test_most_used_character ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- test::should_test_most_used_character stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'test::should_test_most_used_character' (144) panicked at src/test.rs:23:5:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: [('c', 1), ('a', 1), ('b', 1)]
[INFO] [stdout]  right: [('a', 1), ('b', 1), ('c', 1)]
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5615c0098e41 - <<std[97b98282bc616a66]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[832e9a552fc17241]::fmt::Display>::fmt
[INFO] [stdout]    1:     0x5615c00acd6a - core[832e9a552fc17241]::fmt::write
[INFO] [stdout]    2:     0x5615c009d2fc - <alloc[3ecab9f82c41dc7d]::vec::Vec<u8> as std[97b98282bc616a66]::io::Write>::write_fmt
[INFO] [stdout]    3:     0x5615c0077566 - std[97b98282bc616a66]::panicking::default_hook::{closure#0}
[INFO] [stdout]    4:     0x5615c0091069 - std[97b98282bc616a66]::panicking::default_hook
[INFO] [stdout]    5:     0x5615c002c090 - test[39766f3d73431624]::test_main_inner::<test[39766f3d73431624]::test_main_static::{closure#0}>::{closure#0}
[INFO] [stdout]    6:     0x5615c0091222 - std[97b98282bc616a66]::panicking::panic_with_hook
[INFO] [stdout]    7:     0x5615c0077612 - std[97b98282bc616a66]::panicking::panic_handler::{closure#0}
[INFO] [stdout]    8:     0x5615c006ef69 - std[97b98282bc616a66]::sys::backtrace::__rust_end_short_backtrace::<std[97b98282bc616a66]::panicking::panic_handler::{closure#0}, !>
[INFO] [stdout]    9:     0x5615c007820d - __rustc[e3d8617bb01b7f69]::rust_begin_unwind
[INFO] [stdout]   10:     0x5615c00ad49c - core[832e9a552fc17241]::panicking::panic_fmt
[INFO] [stdout]   11:     0x5615c00ad3b3 - core[832e9a552fc17241]::panicking::assert_failed_inner
[INFO] [stdout]   12:     0x5615c001de89 - core[832e9a552fc17241]::panicking::assert_failed::<alloc[3ecab9f82c41dc7d]::vec::Vec<(char, usize)>, alloc[3ecab9f82c41dc7d]::vec::Vec<(char, usize)>>
[INFO] [stdout]   13:     0x5615c001f15b - <supplement_p2_6[e4bd20cdfe389172]::test::should_test_most_used_character::{closure#0} as core[832e9a552fc17241]::ops::function::FnOnce<()>>::call_once
[INFO] [stdout]   14:     0x5615c001f3cb - test[39766f3d73431624]::__rust_begin_short_backtrace::<core[832e9a552fc17241]::result::Result<(), alloc[3ecab9f82c41dc7d]::string::String>, fn() -> core[832e9a552fc17241]::result::Result<(), alloc[3ecab9f82c41dc7d]::string::String>>
[INFO] [stdout]   15:     0x5615c002ca15 - test[39766f3d73431624]::run_test::{closure#0}
[INFO] [stdout]   16:     0x5615c00274c4 - std[97b98282bc616a66]::sys::backtrace::__rust_begin_short_backtrace::<test[39766f3d73431624]::run_test::{closure#1}, ()>
[INFO] [stdout]   17:     0x5615c002fb62 - <std[97b98282bc616a66]::thread::lifecycle::spawn_unchecked<test[39766f3d73431624]::run_test::{closure#1}, ()>::{closure#1} as core[832e9a552fc17241]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
[INFO] [stdout]   18:     0x5615c00986cf - <std[97b98282bc616a66]::sys::thread::unix::Thread>::new::thread_start
[INFO] [stdout]   19:     0x7ea4e660207a - <unknown>
[INFO] [stdout]   20:     0x7ea4e6695534 - clone
[INFO] [stdout]   21:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     test::should_test_most_used_character
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235", kill_on_drop: false }`
[INFO] [stdout] 95ae7cbb69858774f518a12e47df689989837004246f5726552b38e39e78d235
