[INFO] fetching crate railsgun 3.0.1...
[INFO] testing railsgun-3.0.1 against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] extracting crate railsgun 3.0.1 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate railsgun 3.0.1
[INFO] finished tweaking crates.io crate railsgun 3.0.1
[INFO] tweaked toml for crates.io crate railsgun 3.0.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate railsgun 3.0.1 on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 26 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b461ddd5ab12d74908a03942481d7b1d3e59e6d708d29ce002742ea0e737667a
[INFO] running `Command { std: "docker" "start" "-a" "b461ddd5ab12d74908a03942481d7b1d3e59e6d708d29ce002742ea0e737667a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b461ddd5ab12d74908a03942481d7b1d3e59e6d708d29ce002742ea0e737667a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b461ddd5ab12d74908a03942481d7b1d3e59e6d708d29ce002742ea0e737667a", kill_on_drop: false }`
[INFO] [stdout] b461ddd5ab12d74908a03942481d7b1d3e59e6d708d29ce002742ea0e737667a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] edf416e68496ccebbe47ac6a7564df7652c142da059d936b486ee3ce5eb58380
[INFO] running `Command { std: "docker" "start" "-a" "edf416e68496ccebbe47ac6a7564df7652c142da059d936b486ee3ce5eb58380", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling tokio v1.45.1
[INFO] [stderr]    Compiling railsgun v3.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]    --> src/lib.rs:107:1
[INFO] [stdout]     |
[INFO] [stdout] 107 | #[macro_use]
[INFO] [stdout]     | ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:273:5
[INFO] [stdout]     |
[INFO] [stdout] 273 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:355:5
[INFO] [stdout]     |
[INFO] [stdout] 355 |     #[must_use = "if you intended to set a value, consider assignment instead"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:513:5
[INFO] [stdout]     |
[INFO] [stdout] 513 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.46s
[INFO] running `Command { std: "docker" "inspect" "edf416e68496ccebbe47ac6a7564df7652c142da059d936b486ee3ce5eb58380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edf416e68496ccebbe47ac6a7564df7652c142da059d936b486ee3ce5eb58380", kill_on_drop: false }`
[INFO] [stdout] edf416e68496ccebbe47ac6a7564df7652c142da059d936b486ee3ce5eb58380
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 147061b0e72d5ee8d9b46aa54689e76ad9ae67d8fda2c7cc5671309c925cc76f
[INFO] running `Command { std: "docker" "start" "-a" "147061b0e72d5ee8d9b46aa54689e76ad9ae67d8fda2c7cc5671309c925cc76f", kill_on_drop: false }`
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]    --> src/lib.rs:107:1
[INFO] [stdout]     |
[INFO] [stdout] 107 | #[macro_use]
[INFO] [stdout]     | ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:273:5
[INFO] [stdout]     |
[INFO] [stdout] 273 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:355:5
[INFO] [stdout]     |
[INFO] [stdout] 355 |     #[must_use = "if you intended to set a value, consider assignment instead"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:513:5
[INFO] [stdout]     |
[INFO] [stdout] 513 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling railsgun v3.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:273:5
[INFO] [stdout]     |
[INFO] [stdout] 273 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:355:5
[INFO] [stdout]     |
[INFO] [stdout] 355 |     #[must_use = "if you intended to set a value, consider assignment instead"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/option_extended/mod.rs:513:5
[INFO] [stdout]     |
[INFO] [stdout] 513 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Empty` is never constructed
[INFO] [stdout]   --> src/iterators/map_iterator.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     enum TestError {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 32 |         Empty,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TestError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Custom` is never constructed
[INFO] [stdout]    --> src/iterators/mod.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |     enum TestError {
[INFO] [stdout]     |          --------- variant in this enum
[INFO] [stdout] 104 |         Empty,
[INFO] [stdout] 105 |         Custom,
[INFO] [stdout]     |         ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `TestError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "147061b0e72d5ee8d9b46aa54689e76ad9ae67d8fda2c7cc5671309c925cc76f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "147061b0e72d5ee8d9b46aa54689e76ad9ae67d8fda2c7cc5671309c925cc76f", kill_on_drop: false }`
[INFO] [stdout] 147061b0e72d5ee8d9b46aa54689e76ad9ae67d8fda2c7cc5671309c925cc76f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] db2664e439a55b79846ad06f885dfbd99e2b978f75cc5c5d7697ca2ab9edc23f
[INFO] running `Command { std: "docker" "start" "-a" "db2664e439a55b79846ad06f885dfbd99e2b978f75cc5c5d7697ca2ab9edc23f", kill_on_drop: false }`
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]    --> src/lib.rs:107:1
[INFO] [stderr]     |
[INFO] [stderr] 107 | #[macro_use]
[INFO] [stderr]     | ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stderr]    --> src/option_extended/mod.rs:273:5
[INFO] [stderr]     |
[INFO] [stderr] 273 |     #[must_use]
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stderr]    --> src/option_extended/mod.rs:355:5
[INFO] [stderr]     |
[INFO] [stderr] 355 |     #[must_use = "if you intended to set a value, consider assignment instead"]
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stderr]    --> src/option_extended/mod.rs:513:5
[INFO] [stderr]     |
[INFO] [stderr] 513 |     #[must_use]
[INFO] [stderr]     |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Empty` is never constructed
[INFO] [stderr]   --> src/iterators/map_iterator.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     enum TestError {
[INFO] [stderr]    |          --------- variant in this enum
[INFO] [stderr] 32 |         Empty,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TestError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Custom` is never constructed
[INFO] [stderr]    --> src/iterators/mod.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 103 |     enum TestError {
[INFO] [stderr]     |          --------- variant in this enum
[INFO] [stderr] 104 |         Empty,
[INFO] [stderr] 105 |         Custom,
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `TestError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `railsgun` (lib) generated 4 warnings
[INFO] [stderr] warning: `railsgun` (lib test) generated 5 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/railsgun-e656d1382e29a1e3)
[INFO] [stdout] 
[INFO] [stdout] running 28 tests
[INFO] [stdout] test futures::future_result::test::test_and_then ... ok
[INFO] [stdout] test futures::future_result::test::test_map_err ... ok
[INFO] [stdout] test futures::future_result::test::test_map_or ... ok
[INFO] [stdout] test futures::future_result::test::test_merge ... ok
[INFO] [stdout] test futures::future_result::test::test_merge3 ... ok
[INFO] [stdout] test futures::future_result::test::test_merge2 ... ok
[INFO] [stdout] test futures::future_result::test::test_or_else ... ok
[INFO] [stdout] test futures::future_result::test::test_map ... ok
[INFO] [stdout] test futures::future_result::test::test_as_async_result_struct ... ok
[INFO] [stdout] test iterators::map_iterator::tests::test_iter_map_err ... ok
[INFO] [stdout] test futures::future_result::test::unwrap_or_else ... ok
[INFO] [stdout] test iterators::tests::test_count ... ok
[INFO] [stdout] test futures::future_result::test::test_merge4 ... ok
[INFO] [stdout] test futures::future_result::test::test_as_async_result ... ok
[INFO] [stdout] test iterators::tests::test_into_count ... ok
[INFO] [stdout] test iterators::tests::test_is_not_empty_ok ... ok
[INFO] [stdout] test iterators::map_iterator::tests::test_iter_map_ok ... ok
[INFO] [stdout] test rail_merge::test::test_merge ... ok
[INFO] [stdout] test rail_merge::test::test_merge2 ... ok
[INFO] [stdout] test iterators::tests::test_is_not_empty_err ... ok
[INFO] [stdout] test rail_merge::test::test_merge4 ... ok
[INFO] [stdout] test rail_tap::test::test_opt_tap_mut ... ok
[INFO] [stdout] test rail_tap::test::test_opt_tap_ref ... ok
[INFO] [stdout] test rail_merge::test::test_merge3 ... ok
[INFO] [stdout] test rail_tap::test::test_res_err_mut ... ok
[INFO] [stdout] test rail_tap::test::test_res_err_ref ... ok
[INFO] [stdout] test rail_tap::test::test_res_tap_mut ... ok
[INFO] [stdout] test rail_tap::test::test_res_tap_ref ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 28 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "db2664e439a55b79846ad06f885dfbd99e2b978f75cc5c5d7697ca2ab9edc23f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db2664e439a55b79846ad06f885dfbd99e2b978f75cc5c5d7697ca2ab9edc23f", kill_on_drop: false }`
[INFO] [stdout] db2664e439a55b79846ad06f885dfbd99e2b978f75cc5c5d7697ca2ab9edc23f