[INFO] crate cassandra-cpp-sys 0.12.0 is already in cache
[INFO] extracting crate cassandra-cpp-sys 0.12.0 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/cassandra-cpp-sys/0.12.0
[INFO] extracting crate cassandra-cpp-sys 0.12.0 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/cassandra-cpp-sys/0.12.0
[INFO] validating manifest of cassandra-cpp-sys-0.12.0 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cassandra-cpp-sys-0.12.0 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cassandra-cpp-sys-0.12.0
[INFO] finished frobbing cassandra-cpp-sys-0.12.0
[INFO] frobbed toml for cassandra-cpp-sys-0.12.0 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/cassandra-cpp-sys/0.12.0/Cargo.toml
[INFO] started frobbing cassandra-cpp-sys-0.12.0
[INFO] finished frobbing cassandra-cpp-sys-0.12.0
[INFO] frobbed toml for cassandra-cpp-sys-0.12.0 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/cassandra-cpp-sys/0.12.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking cassandra-cpp-sys-0.12.0 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-5/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/cassandra-cpp-sys/0.12.0:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9369f2793f237688998aaba1252e879a5ed4e6fd6744a377439033c97da45bb8
[INFO] running `"docker" "start" "-a" "9369f2793f237688998aaba1252e879a5ed4e6fd6744a377439033c97da45bb8"`
[INFO] [stderr]    Compiling cassandra-cpp-sys v0.12.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `rc`
[INFO] [stderr]   --> examples/tuple.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         let rc = cass_future_error_code(future);
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_rc`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rc`
[INFO] [stderr]   --> examples/tuple.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |             rc => print_error(future),
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_rc`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/async.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let mut cluster = create_cluster();
[INFO] [stderr]    |             ----^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> examples/tuple.rs:123:13
[INFO] [stderr]     |
[INFO] [stderr] 123 |         let mut session = &mut *cass_session_new();
[INFO] [stderr]     |             ----^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]   --> examples/maps.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |         let result = match cass_future_error_code(future) {
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `select_from_maps`
[INFO] [stderr]   --> examples/maps.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn select_from_maps(session: &mut CassSession, key: &str) -> Result<(), CassError> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]   --> examples/simple.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let result = match cass_future_error_code(connect_future) {
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rc`
[INFO] [stderr]   --> examples/simple.rs:52:21
[INFO] [stderr]    |
[INFO] [stderr] 52 |                     rc => {
[INFO] [stderr]    |                     ^^ help: consider prefixing with an underscore: `_rc`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rc`
[INFO] [stderr]   --> examples/simple.rs:70:13
[INFO] [stderr]    |
[INFO] [stderr] 70 |             rc => {
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_rc`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rc`
[INFO] [stderr]   --> examples/ssl.rs:92:21
[INFO] [stderr]    |
[INFO] [stderr] 92 |                     rc => {
[INFO] [stderr]    |                     ^^ help: consider prefixing with an underscore: `_rc`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rc`
[INFO] [stderr]   --> examples/named_parameters.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |         let rc = cass_future_error_code(future);
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_rc`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]   --> examples/named_parameters.rs:92:13
[INFO] [stderr]    |
[INFO] [stderr] 92 |         let result = match cass_future_error_code(future) {
[INFO] [stderr]    |             ^^^^^^ help: consider prefixing with an underscore: `_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]    --> examples/named_parameters.rs:170:13
[INFO] [stderr]     |
[INFO] [stderr] 170 |         let result = match connect_session(session, cluster) {
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_result`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rc`
[INFO] [stderr]    --> examples/named_parameters.rs:172:13
[INFO] [stderr]     |
[INFO] [stderr] 172 |             rc => {
[INFO] [stderr]     |             ^^ help: consider prefixing with an underscore: `_rc`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.78s
[INFO] running `"docker" "inspect" "9369f2793f237688998aaba1252e879a5ed4e6fd6744a377439033c97da45bb8"`
[INFO] running `"docker" "rm" "-f" "9369f2793f237688998aaba1252e879a5ed4e6fd6744a377439033c97da45bb8"`
[INFO] [stdout] 9369f2793f237688998aaba1252e879a5ed4e6fd6744a377439033c97da45bb8