[INFO] crate varlink-cli 4.2.1 is already in cache
[INFO] extracting crate varlink-cli 4.2.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/varlink-cli/4.2.1
[INFO] extracting crate varlink-cli 4.2.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/varlink-cli/4.2.1
[INFO] validating manifest of varlink-cli-4.2.1 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of varlink-cli-4.2.1 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing varlink-cli-4.2.1
[INFO] finished frobbing varlink-cli-4.2.1
[INFO] frobbed toml for varlink-cli-4.2.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/varlink-cli/4.2.1/Cargo.toml
[INFO] started frobbing varlink-cli-4.2.1
[INFO] finished frobbing varlink-cli-4.2.1
[INFO] frobbed toml for varlink-cli-4.2.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/varlink-cli/4.2.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing varlink-cli-4.2.1 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/varlink-cli/4.2.1:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 61bf50819de7efed6ac8baf0b0307def23a0bf7522b98bf2241aa439fcea859f
[INFO] running `"docker" "start" "-a" "61bf50819de7efed6ac8baf0b0307def23a0bf7522b98bf2241aa439fcea859f"`
[INFO] [stderr]    Compiling varlink_stdinterfaces v8.0.0
[INFO] [stderr]    Compiling varlink v8.1.0
[INFO] [stderr]    Compiling colored_json v2.0.0
[INFO] [stderr]    Compiling varlink-cli v4.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:30:49
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub type Result<T> = std::result::Result<T, Box<std::error::Error>>;
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.80s
[INFO] running `"docker" "inspect" "61bf50819de7efed6ac8baf0b0307def23a0bf7522b98bf2241aa439fcea859f"`
[INFO] running `"docker" "rm" "-f" "61bf50819de7efed6ac8baf0b0307def23a0bf7522b98bf2241aa439fcea859f"`
[INFO] [stdout] 61bf50819de7efed6ac8baf0b0307def23a0bf7522b98bf2241aa439fcea859f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/varlink-cli/4.2.1:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] b2548f145368acfa14a23007d636d3cacf346635fca35891717b2d2035dad79b
[INFO] running `"docker" "start" "-a" "b2548f145368acfa14a23007d636d3cacf346635fca35891717b2d2035dad79b"`
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]    Compiling varlink-cli v4.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/test.rs:6:34
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn test_exec() -> Result<(), Box<Error>> {
[INFO] [stderr]   |                                  ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:30:49
[INFO] [stderr]    |
[INFO] [stderr] 30 | pub type Result<T> = std::result::Result<T, Box<std::error::Error>>;
[INFO] [stderr]    |                                                 ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.92s
[INFO] running `"docker" "inspect" "b2548f145368acfa14a23007d636d3cacf346635fca35891717b2d2035dad79b"`
[INFO] running `"docker" "rm" "-f" "b2548f145368acfa14a23007d636d3cacf346635fca35891717b2d2035dad79b"`
[INFO] [stdout] b2548f145368acfa14a23007d636d3cacf346635fca35891717b2d2035dad79b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/varlink-cli/4.2.1:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 7b4fd6b5f1a912569fa8f4cb5796959d06ce789b5d225e01ceed3bb95ec4ea8e
[INFO] running `"docker" "start" "-a" "7b4fd6b5f1a912569fa8f4cb5796959d06ce789b5d225e01ceed3bb95ec4ea8e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/varlink-4d53c6679662cfb0
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test::test_exec ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7b4fd6b5f1a912569fa8f4cb5796959d06ce789b5d225e01ceed3bb95ec4ea8e"`
[INFO] running `"docker" "rm" "-f" "7b4fd6b5f1a912569fa8f4cb5796959d06ce789b5d225e01ceed3bb95ec4ea8e"`
[INFO] [stdout] 7b4fd6b5f1a912569fa8f4cb5796959d06ce789b5d225e01ceed3bb95ec4ea8e