[INFO] updating cached repository slier81/multithreaded_webserver
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/slier81/multithreaded_webserver
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/slier81/multithreaded_webserver" "work/ex/beta-1.38-1/sources/1.37.0/gh/slier81/multithreaded_webserver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/slier81/multithreaded_webserver'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/slier81/multithreaded_webserver" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slier81/multithreaded_webserver"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slier81/multithreaded_webserver'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f86b366c6748a2095e8c77329c274d2d122ae92d
[INFO] sha for GitHub repo slier81/multithreaded_webserver: f86b366c6748a2095e8c77329c274d2d122ae92d
[INFO] validating manifest of slier81/multithreaded_webserver 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 slier81/multithreaded_webserver 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 slier81/multithreaded_webserver
[INFO] finished frobbing slier81/multithreaded_webserver
[INFO] frobbed toml for slier81/multithreaded_webserver written to work/ex/beta-1.38-1/sources/1.37.0/gh/slier81/multithreaded_webserver/Cargo.toml
[INFO] started frobbing slier81/multithreaded_webserver
[INFO] finished frobbing slier81/multithreaded_webserver
[INFO] frobbed toml for slier81/multithreaded_webserver written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/slier81/multithreaded_webserver/Cargo.toml
[INFO] crate slier81/multithreaded_webserver already has a lockfile, it will not be regenerated
[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 slier81/multithreaded_webserver against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slier81/multithreaded_webserver:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] a61424ae3c5fe76ee3e397cd999ecc994b4aee8d9831e23bd0c501610fabc56e
[INFO] running `"docker" "start" "-a" "a61424ae3c5fe76ee3e397cd999ecc994b4aee8d9831e23bd0c501610fabc56e"`
[INFO] [stderr]    Compiling web_server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread::Thread`
[INFO] [stderr]  --> src/bin/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::thread::Thread;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.60s
[INFO] running `"docker" "inspect" "a61424ae3c5fe76ee3e397cd999ecc994b4aee8d9831e23bd0c501610fabc56e"`
[INFO] running `"docker" "rm" "-f" "a61424ae3c5fe76ee3e397cd999ecc994b4aee8d9831e23bd0c501610fabc56e"`
[INFO] [stdout] a61424ae3c5fe76ee3e397cd999ecc994b4aee8d9831e23bd0c501610fabc56e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slier81/multithreaded_webserver:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 405ce1d280a40580cf6a2ac17603004ae018def0e3f3ecfc51d7850590fa7c39
[INFO] running `"docker" "start" "-a" "405ce1d280a40580cf6a2ac17603004ae018def0e3f3ecfc51d7850590fa7c39"`
[INFO] [stderr]    Compiling web_server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::thread::Thread`
[INFO] [stderr]  --> src/bin/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::thread::Thread;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "405ce1d280a40580cf6a2ac17603004ae018def0e3f3ecfc51d7850590fa7c39"`
[INFO] running `"docker" "rm" "-f" "405ce1d280a40580cf6a2ac17603004ae018def0e3f3ecfc51d7850590fa7c39"`
[INFO] [stdout] 405ce1d280a40580cf6a2ac17603004ae018def0e3f3ecfc51d7850590fa7c39
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/slier81/multithreaded_webserver:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 3a7ef6af2ba68af527caa1754863d3d54a0c3f2a579c18a588c8ec1f48f57001
[INFO] running `"docker" "start" "-a" "3a7ef6af2ba68af527caa1754863d3d54a0c3f2a579c18a588c8ec1f48f57001"`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/web_server-23062165307bf75d
[INFO] [stderr]      Running /opt/crater/target/debug/deps/main-0ab4f3fdb25d2034
[INFO] [stderr]    Doc-tests web_server
[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" "3a7ef6af2ba68af527caa1754863d3d54a0c3f2a579c18a588c8ec1f48f57001"`
[INFO] running `"docker" "rm" "-f" "3a7ef6af2ba68af527caa1754863d3d54a0c3f2a579c18a588c8ec1f48f57001"`
[INFO] [stdout] 3a7ef6af2ba68af527caa1754863d3d54a0c3f2a579c18a588c8ec1f48f57001