[INFO] cloning repository magiccrafter/hr-balanced-brackets
[INFO] running `"git" "clone" "--bare" "git://github.com/magiccrafter/hr-balanced-brackets.git" "work/cache/sources/gh/magiccrafter/hr-balanced-brackets"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/magiccrafter/hr-balanced-brackets'...
[INFO] running `"git" "clone" "work/cache/sources/gh/magiccrafter/hr-balanced-brackets" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/magiccrafter/hr-balanced-brackets"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/magiccrafter/hr-balanced-brackets'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/magiccrafter/hr-balanced-brackets" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/magiccrafter/hr-balanced-brackets"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/magiccrafter/hr-balanced-brackets'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c7e247014b745edb45c635fc50c5cf06f27e6369
[INFO] sha for GitHub repo magiccrafter/hr-balanced-brackets: c7e247014b745edb45c635fc50c5cf06f27e6369
[INFO] validating manifest of magiccrafter/hr-balanced-brackets on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of magiccrafter/hr-balanced-brackets on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing magiccrafter/hr-balanced-brackets
[INFO] finished frobbing magiccrafter/hr-balanced-brackets
[INFO] frobbed toml for magiccrafter/hr-balanced-brackets written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/magiccrafter/hr-balanced-brackets/Cargo.toml
[INFO] started frobbing magiccrafter/hr-balanced-brackets
[INFO] finished frobbing magiccrafter/hr-balanced-brackets
[INFO] frobbed toml for magiccrafter/hr-balanced-brackets written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/magiccrafter/hr-balanced-brackets/Cargo.toml
[INFO] crate magiccrafter/hr-balanced-brackets already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing magiccrafter/hr-balanced-brackets against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/magiccrafter/hr-balanced-brackets:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] 87a4054afd61151e75bfc35fe6e6c300154d4fef38ba5713067b8dbcd7fb3391
[INFO] running `"docker" "start" "-a" "87a4054afd61151e75bfc35fe6e6c300154d4fef38ba5713067b8dbcd7fb3391"`
[INFO] [stderr]    Compiling hr-balanced-brackets v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `n` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let mut n: i32 = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr]    = note: consider using `_n` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `n` is never read
[INFO] [stderr]   --> src/main.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |             n = line.parse().unwrap(); // first line is the size of the test data input
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]   --> src/main.rs:48:14
[INFO] [stderr]    |
[INFO] [stderr] 48 |         for (idx, ch) in bracket.char_indices() {
[INFO] [stderr]    |              ^^^ help: consider prefixing with an underscore: `_idx`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "87a4054afd61151e75bfc35fe6e6c300154d4fef38ba5713067b8dbcd7fb3391"`
[INFO] running `"docker" "rm" "-f" "87a4054afd61151e75bfc35fe6e6c300154d4fef38ba5713067b8dbcd7fb3391"`
[INFO] [stdout] 87a4054afd61151e75bfc35fe6e6c300154d4fef38ba5713067b8dbcd7fb3391
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/magiccrafter/hr-balanced-brackets:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] b78d5573ec794b2841e77869b74875324f001fee7646aa40df7b931eb23f46ca
[INFO] running `"docker" "start" "-a" "b78d5573ec794b2841e77869b74875324f001fee7646aa40df7b931eb23f46ca"`
[INFO] [stderr]    Compiling hr-balanced-brackets v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `n` is assigned to, but never used
[INFO] [stderr]   --> src/main.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let mut n: i32 = 0;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr]    = note: consider using `_n` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `n` is never read
[INFO] [stderr]   --> src/main.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |             n = line.parse().unwrap(); // first line is the size of the test data input
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `idx`
[INFO] [stderr]   --> src/main.rs:48:14
[INFO] [stderr]    |
[INFO] [stderr] 48 |         for (idx, ch) in bracket.char_indices() {
[INFO] [stderr]    |              ^^^ help: consider prefixing with an underscore: `_idx`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "b78d5573ec794b2841e77869b74875324f001fee7646aa40df7b931eb23f46ca"`
[INFO] running `"docker" "rm" "-f" "b78d5573ec794b2841e77869b74875324f001fee7646aa40df7b931eb23f46ca"`
[INFO] [stdout] b78d5573ec794b2841e77869b74875324f001fee7646aa40df7b931eb23f46ca
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-0/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/magiccrafter/hr-balanced-brackets:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen"`
[INFO] [stdout] 7a65854b9fd46d56a0a82a41a55d56ceff2c5cda386b955c7d45f5d3b4c0c3f5
[INFO] running `"docker" "start" "-a" "7a65854b9fd46d56a0a82a41a55d56ceff2c5cda386b955c7d45f5d3b4c0c3f5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hr_balanced_brackets-9e08a3ff57972f69
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7a65854b9fd46d56a0a82a41a55d56ceff2c5cda386b955c7d45f5d3b4c0c3f5"`
[INFO] running `"docker" "rm" "-f" "7a65854b9fd46d56a0a82a41a55d56ceff2c5cda386b955c7d45f5d3b4c0c3f5"`
[INFO] [stdout] 7a65854b9fd46d56a0a82a41a55d56ceff2c5cda386b955c7d45f5d3b4c0c3f5