[INFO] crate amplify 0.1.8 is already in cache
[INFO] testing amplify-0.1.8 against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] extracting crate amplify 0.1.8 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate amplify 0.1.8 on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate amplify 0.1.8
[INFO] finished tweaking crates.io crate amplify 0.1.8
[INFO] tweaked toml for crates.io crate amplify 0.1.8 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 852f6ff63665c9e774253a8c6fefaa8f4f17a532fce7aa4cb8899b8618fa0b21
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "852f6ff63665c9e774253a8c6fefaa8f4f17a532fce7aa4cb8899b8618fa0b21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "852f6ff63665c9e774253a8c6fefaa8f4f17a532fce7aa4cb8899b8618fa0b21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "852f6ff63665c9e774253a8c6fefaa8f4f17a532fce7aa4cb8899b8618fa0b21", kill_on_drop: false }`
[INFO] [stdout] 852f6ff63665c9e774253a8c6fefaa8f4f17a532fce7aa4cb8899b8618fa0b21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f6f2010aca68b9279b29868fefb472c254d16d7b6a1183b309de0916506257c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6f6f2010aca68b9279b29868fefb472c254d16d7b6a1183b309de0916506257c", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling amplify v0.1.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.58s
[INFO] running `Command { std: "docker" "inspect" "6f6f2010aca68b9279b29868fefb472c254d16d7b6a1183b309de0916506257c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f6f2010aca68b9279b29868fefb472c254d16d7b6a1183b309de0916506257c", kill_on_drop: false }`
[INFO] [stdout] 6f6f2010aca68b9279b29868fefb472c254d16d7b6a1183b309de0916506257c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1570734b3747d6ac1b32cd938cd9ebbb46c4935665f642e94c70db3d8161fec4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1570734b3747d6ac1b32cd938cd9ebbb46c4935665f642e94c70db3d8161fec4", kill_on_drop: false }`
[INFO] [stderr]    Compiling amplify v0.1.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `unwrapped`
[INFO] [stdout]    --> src/macros.rs:20:13
[INFO] [stdout]     |
[INFO] [stdout] 20  |         let $var = if let Some($var) = $option {
[INFO] [stdout]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_unwrapped`
[INFO] [stdout] ...
[INFO] [stdout] 129 |         guard! { let unwrapped = opt else { assert!(false) } }
[INFO] [stdout]     |         ------------------------------------------------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_guard`
[INFO] [stdout]    --> src/macros.rs:126:8
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn test_guard() {
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `Command { std: "docker" "inspect" "1570734b3747d6ac1b32cd938cd9ebbb46c4935665f642e94c70db3d8161fec4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1570734b3747d6ac1b32cd938cd9ebbb46c4935665f642e94c70db3d8161fec4", kill_on_drop: false }`
[INFO] [stdout] 1570734b3747d6ac1b32cd938cd9ebbb46c4935665f642e94c70db3d8161fec4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 66f4a8379f89b33a3a350e9eec7496e2d9b2641e4a7bb5af6e488d3c15de25b7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "66f4a8379f89b33a3a350e9eec7496e2d9b2641e4a7bb5af6e488d3c15de25b7", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `unwrapped`
[INFO] [stderr]    --> src/macros.rs:20:13
[INFO] [stderr]     |
[INFO] [stderr] 20  |         let $var = if let Some($var) = $option {
[INFO] [stderr]     |             ^^^^ help: if this is intentional, prefix it with an underscore: `_unwrapped`
[INFO] [stderr] ...
[INFO] [stderr] 129 |         guard! { let unwrapped = opt else { assert!(false) } }
[INFO] [stderr]     |         ------------------------------------------------------ in this macro invocation
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_guard`
[INFO] [stderr]    --> src/macros.rs:126:8
[INFO] [stderr]     |
[INFO] [stderr] 126 |     fn test_guard() {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/amplify-07d8d92b6f07480a
[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] [stderr]    Doc-tests amplify
[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 `Command { std: "docker" "inspect" "66f4a8379f89b33a3a350e9eec7496e2d9b2641e4a7bb5af6e488d3c15de25b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66f4a8379f89b33a3a350e9eec7496e2d9b2641e4a7bb5af6e488d3c15de25b7", kill_on_drop: false }`
[INFO] [stdout] 66f4a8379f89b33a3a350e9eec7496e2d9b2641e4a7bb5af6e488d3c15de25b7