[INFO] crate johnston 0.2.1 is already in cache
[INFO] testing johnston-0.2.1 against try#41997647ba6a77908f6ef64401414feb00bccf16 for pr-71274
[INFO] extracting crate johnston 0.2.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate johnston 0.2.1 on toolchain 41997647ba6a77908f6ef64401414feb00bccf16
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate johnston 0.2.1
[INFO] finished tweaking crates.io crate johnston 0.2.1
[INFO] tweaked toml for crates.io crate johnston 0.2.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate crates.io crate johnston 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6098f1354825edeee02a3b6320066726d0b860874d13a3980389bfecf014fda7
[INFO] running `"docker" "start" "-a" "6098f1354825edeee02a3b6320066726d0b860874d13a3980389bfecf014fda7"`
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling num-rational v0.2.3
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling serde_json v1.0.48
[INFO] [stderr]    Compiling johnston v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `factors`
[INFO] [stderr]    --> src/lib.rs:108:4
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn factors(num: i32) -> Vec<i32> {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prime`
[INFO] [stderr]    --> src/lib.rs:120:4
[INFO] [stderr]     |
[INFO] [stderr] 120 | fn prime(num: i32) -> bool {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `power_of_two`
[INFO] [stderr]    --> src/lib.rs:130:4
[INFO] [stderr]     |
[INFO] [stderr] 130 | fn power_of_two(num: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gpf`
[INFO] [stderr]    --> src/lib.rs:134:4
[INFO] [stderr]     |
[INFO] [stderr] 134 | fn gpf(num: i32) -> i32 {
[INFO] [stderr]     |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 57.57s
[INFO] running `"docker" "inspect" "6098f1354825edeee02a3b6320066726d0b860874d13a3980389bfecf014fda7"`
[INFO] running `"docker" "rm" "-f" "6098f1354825edeee02a3b6320066726d0b860874d13a3980389bfecf014fda7"`
[INFO] [stdout] 6098f1354825edeee02a3b6320066726d0b860874d13a3980389bfecf014fda7
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0fa41117087b6070dbacdc68060364972d85be725db02d2c6255188caa3f4903
[INFO] running `"docker" "start" "-a" "0fa41117087b6070dbacdc68060364972d85be725db02d2c6255188caa3f4903"`
[INFO] [stderr]    Compiling johnston v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `factors`
[INFO] [stderr]    --> src/lib.rs:108:4
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn factors(num: i32) -> Vec<i32> {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prime`
[INFO] [stderr]    --> src/lib.rs:120:4
[INFO] [stderr]     |
[INFO] [stderr] 120 | fn prime(num: i32) -> bool {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `power_of_two`
[INFO] [stderr]    --> src/lib.rs:130:4
[INFO] [stderr]     |
[INFO] [stderr] 130 | fn power_of_two(num: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gpf`
[INFO] [stderr]    --> src/lib.rs:134:4
[INFO] [stderr]     |
[INFO] [stderr] 134 | fn gpf(num: i32) -> i32 {
[INFO] [stderr]     |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "0fa41117087b6070dbacdc68060364972d85be725db02d2c6255188caa3f4903"`
[INFO] running `"docker" "rm" "-f" "0fa41117087b6070dbacdc68060364972d85be725db02d2c6255188caa3f4903"`
[INFO] [stdout] 0fa41117087b6070dbacdc68060364972d85be725db02d2c6255188caa3f4903
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "/opt/rustwide/cargo-home/bin/cargo" "+41997647ba6a77908f6ef64401414feb00bccf16" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 82c6d170a72a72a5fc5c38a36ca75fb2dddcfcd014998330257f570e0db4a30d
[INFO] running `"docker" "start" "-a" "82c6d170a72a72a5fc5c38a36ca75fb2dddcfcd014998330257f570e0db4a30d"`
[INFO] [stderr] warning: function is never used: `factors`
[INFO] [stderr]    --> src/lib.rs:108:4
[INFO] [stderr]     |
[INFO] [stderr] 108 | fn factors(num: i32) -> Vec<i32> {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prime`
[INFO] [stderr]    --> src/lib.rs:120:4
[INFO] [stderr]     |
[INFO] [stderr] 120 | fn prime(num: i32) -> bool {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `power_of_two`
[INFO] [stderr]    --> src/lib.rs:130:4
[INFO] [stderr]     |
[INFO] [stderr] 130 | fn power_of_two(num: i32) -> bool {
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gpf`
[INFO] [stderr]    --> src/lib.rs:134:4
[INFO] [stderr]     |
[INFO] [stderr] 134 | fn gpf(num: i32) -> i32 {
[INFO] [stderr]     |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/johnston-64e7d73d47ddefb5
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::walk_works ... ok
[INFO] [stdout] test tests::prime_works ... ok
[INFO] [stdout] test tests::flatten_works ... ok
[INFO] [stdout] test tests::factors_works ... ok
[INFO] [stdout] test tests::gpf_works ... ok
[INFO] [stdout] test tests::cents_works ... ok
[INFO] [stdout] test tests::power_of_two_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/smoke_test-e03a9c510b4a352d
[INFO] [stderr]    Doc-tests johnston
[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] [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" "82c6d170a72a72a5fc5c38a36ca75fb2dddcfcd014998330257f570e0db4a30d"`
[INFO] running `"docker" "rm" "-f" "82c6d170a72a72a5fc5c38a36ca75fb2dddcfcd014998330257f570e0db4a30d"`
[INFO] [stdout] 82c6d170a72a72a5fc5c38a36ca75fb2dddcfcd014998330257f570e0db4a30d