[INFO] updating cached repository mitsuhiko/rust-execution-context
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mitsuhiko/rust-execution-context
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mitsuhiko/rust-execution-context" "work/ex/beta-1.37-6/sources/1.36.0/gh/mitsuhiko/rust-execution-context"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/mitsuhiko/rust-execution-context'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mitsuhiko/rust-execution-context" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mitsuhiko/rust-execution-context"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mitsuhiko/rust-execution-context'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f48dc76f0a3a844d1ddaa8cf303ca2bf6c999bc2
[INFO] sha for GitHub repo mitsuhiko/rust-execution-context: f48dc76f0a3a844d1ddaa8cf303ca2bf6c999bc2
[INFO] validating manifest of mitsuhiko/rust-execution-context on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mitsuhiko/rust-execution-context on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mitsuhiko/rust-execution-context
[INFO] finished frobbing mitsuhiko/rust-execution-context
[INFO] frobbed toml for mitsuhiko/rust-execution-context written to work/ex/beta-1.37-6/sources/1.36.0/gh/mitsuhiko/rust-execution-context/Cargo.toml
[INFO] started frobbing mitsuhiko/rust-execution-context
[INFO] finished frobbing mitsuhiko/rust-execution-context
[INFO] frobbed toml for mitsuhiko/rust-execution-context written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mitsuhiko/rust-execution-context/Cargo.toml
[INFO] crate mitsuhiko/rust-execution-context already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mitsuhiko/rust-execution-context against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mitsuhiko/rust-execution-context:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 8af33018aff82a64bf526b6f69447dd70fb600e26299c42f6a2e68860aa5af6c
[INFO] running `"docker" "start" "-a" "8af33018aff82a64bf526b6f69447dd70fb600e26299c42f6a2e68860aa5af6c"`
[INFO] [stderr]    Compiling im v10.2.0
[INFO] [stderr]    Compiling execution-context v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::wrapping_add` that must be used
[INFO] [stderr]   --> src/data.rs:87:13
[INFO] [stderr]    |
[INFO] [stderr] 87 |             self.id.wrapping_add(x as u64);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.36s
[INFO] running `"docker" "inspect" "8af33018aff82a64bf526b6f69447dd70fb600e26299c42f6a2e68860aa5af6c"`
[INFO] running `"docker" "rm" "-f" "8af33018aff82a64bf526b6f69447dd70fb600e26299c42f6a2e68860aa5af6c"`
[INFO] [stdout] 8af33018aff82a64bf526b6f69447dd70fb600e26299c42f6a2e68860aa5af6c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mitsuhiko/rust-execution-context:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7be4da963fcfd3db3d8988aeb9a4824ce21bd08012497af3cbce0c0e06bbf8fd
[INFO] running `"docker" "start" "-a" "7be4da963fcfd3db3d8988aeb9a4824ce21bd08012497af3cbce0c0e06bbf8fd"`
[INFO] [stderr]    Compiling execution-context v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `core::num::<impl u64>::wrapping_add` that must be used
[INFO] [stderr]   --> src/data.rs:87:13
[INFO] [stderr]    |
[INFO] [stderr] 87 |             self.id.wrapping_add(x as u64);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: this returns the result of the operation, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.85s
[INFO] running `"docker" "inspect" "7be4da963fcfd3db3d8988aeb9a4824ce21bd08012497af3cbce0c0e06bbf8fd"`
[INFO] running `"docker" "rm" "-f" "7be4da963fcfd3db3d8988aeb9a4824ce21bd08012497af3cbce0c0e06bbf8fd"`
[INFO] [stdout] 7be4da963fcfd3db3d8988aeb9a4824ce21bd08012497af3cbce0c0e06bbf8fd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mitsuhiko/rust-execution-context:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 94116f3dc2602ee9c90cd1c0f10d96e5f6cb19f0f0175d16642a4d5f11db519e
[INFO] running `"docker" "start" "-a" "94116f3dc2602ee9c90cd1c0f10d96e5f6cb19f0f0175d16642a4d5f11db519e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/execution_context-fb150025e371c094
[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]      Running /opt/crater/target/debug/deps/test_basic-9d508840dca47f0d
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test test_basic_propagation ... ok
[INFO] [stdout] test test_running_default ... ok
[INFO] [stdout] test test_flow_disabling ... ok
[INFO] [stdout] test test_flow_suppression ... ok
[INFO] [stdout] test test_basic_propagation_to_threads ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests execution-context
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/ctx.rs - ctx::ExecutionContext::suppress_flow (line 150) ... ok
[INFO] [stdout] test src/ctx.rs - ctx::ExecutionContext::capture (line 119) ... ok
[INFO] [stdout] test src/lib.rs -  (line 24) ... ok
[INFO] [stdout] test src/ctx.rs - ctx::ExecutionContext::run (line 206) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "94116f3dc2602ee9c90cd1c0f10d96e5f6cb19f0f0175d16642a4d5f11db519e"`
[INFO] running `"docker" "rm" "-f" "94116f3dc2602ee9c90cd1c0f10d96e5f6cb19f0f0175d16642a4d5f11db519e"`
[INFO] [stdout] 94116f3dc2602ee9c90cd1c0f10d96e5f6cb19f0f0175d16642a4d5f11db519e