[INFO] updating cached repository amccreight/heapgraph
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/amccreight/heapgraph
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/amccreight/heapgraph" "work/ex/beta-1.37-6/sources/1.36.0/gh/amccreight/heapgraph"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/amccreight/heapgraph'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/amccreight/heapgraph" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/amccreight/heapgraph"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/amccreight/heapgraph'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1dd17f6e89bb10a0a0189e22bfde3dc564b175c7
[INFO] sha for GitHub repo amccreight/heapgraph: 1dd17f6e89bb10a0a0189e22bfde3dc564b175c7
[INFO] validating manifest of amccreight/heapgraph 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 amccreight/heapgraph 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 amccreight/heapgraph
[INFO] finished frobbing amccreight/heapgraph
[INFO] frobbed toml for amccreight/heapgraph written to work/ex/beta-1.37-6/sources/1.36.0/gh/amccreight/heapgraph/Cargo.toml
[INFO] started frobbing amccreight/heapgraph
[INFO] finished frobbing amccreight/heapgraph
[INFO] frobbed toml for amccreight/heapgraph written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/amccreight/heapgraph/Cargo.toml
[INFO] crate amccreight/heapgraph 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 amccreight/heapgraph 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-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/amccreight/heapgraph:/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] 2ae2a9e6133abfe74585ee6bdaa04714c189e1a2e4033c87443f38292316d910
[INFO] running `"docker" "start" "-a" "2ae2a9e6133abfe74585ee6bdaa04714c189e1a2e4033c87443f38292316d910"`
[INFO] [stderr]    Compiling regex-syntax v0.3.7
[INFO] [stderr]    Compiling regex v0.1.77
[INFO] [stderr]    Compiling heapgraph_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `print_known_edges`
[INFO] [stderr]   --> src/find_roots.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn print_known_edges(log: &CCLog, x: &Addr, known_edges: &Vec<Addr>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.52s
[INFO] running `"docker" "inspect" "2ae2a9e6133abfe74585ee6bdaa04714c189e1a2e4033c87443f38292316d910"`
[INFO] running `"docker" "rm" "-f" "2ae2a9e6133abfe74585ee6bdaa04714c189e1a2e4033c87443f38292316d910"`
[INFO] [stdout] 2ae2a9e6133abfe74585ee6bdaa04714c189e1a2e4033c87443f38292316d910
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/amccreight/heapgraph:/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] f63af02a65f24d500ead7899dd4078d8747c8cfcd2b354f8269b43ce27ee57ac
[INFO] running `"docker" "start" "-a" "f63af02a65f24d500ead7899dd4078d8747c8cfcd2b354f8269b43ce27ee57ac"`
[INFO] [stderr]    Compiling heapgraph_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `print_known_edges`
[INFO] [stderr]   --> src/find_roots.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | fn print_known_edges(log: &CCLog, x: &Addr, known_edges: &Vec<Addr>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `"docker" "inspect" "f63af02a65f24d500ead7899dd4078d8747c8cfcd2b354f8269b43ce27ee57ac"`
[INFO] running `"docker" "rm" "-f" "f63af02a65f24d500ead7899dd4078d8747c8cfcd2b354f8269b43ce27ee57ac"`
[INFO] [stdout] f63af02a65f24d500ead7899dd4078d8747c8cfcd2b354f8269b43ce27ee57ac
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/amccreight/heapgraph:/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] c658402323353ec4b6df2d63efe6cdc6a2b341680ce2b8bf2bafed44110f0777
[INFO] running `"docker" "start" "-a" "c658402323353ec4b6df2d63efe6cdc6a2b341680ce2b8bf2bafed44110f0777"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/heapgraph_rust-f2f4563fc8834dcd
[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" "c658402323353ec4b6df2d63efe6cdc6a2b341680ce2b8bf2bafed44110f0777"`
[INFO] running `"docker" "rm" "-f" "c658402323353ec4b6df2d63efe6cdc6a2b341680ce2b8bf2bafed44110f0777"`
[INFO] [stdout] c658402323353ec4b6df2d63efe6cdc6a2b341680ce2b8bf2bafed44110f0777