[INFO] updating cached repository mmmpa/learning_storage_engine [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/mmmpa/learning_storage_engine [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/mmmpa/learning_storage_engine" "work/ex/beta-1.38-1/sources/1.37.0/gh/mmmpa/learning_storage_engine"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mmmpa/learning_storage_engine'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/mmmpa/learning_storage_engine" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mmmpa/learning_storage_engine"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mmmpa/learning_storage_engine'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 6bdb87c206a45be350d7c41228ada15cb36e06ce [INFO] sha for GitHub repo mmmpa/learning_storage_engine: 6bdb87c206a45be350d7c41228ada15cb36e06ce [INFO] validating manifest of mmmpa/learning_storage_engine 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 mmmpa/learning_storage_engine 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 mmmpa/learning_storage_engine [INFO] finished frobbing mmmpa/learning_storage_engine [INFO] frobbed toml for mmmpa/learning_storage_engine written to work/ex/beta-1.38-1/sources/1.37.0/gh/mmmpa/learning_storage_engine/Cargo.toml [INFO] started frobbing mmmpa/learning_storage_engine [INFO] finished frobbing mmmpa/learning_storage_engine [INFO] frobbed toml for mmmpa/learning_storage_engine written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mmmpa/learning_storage_engine/Cargo.toml [INFO] crate mmmpa/learning_storage_engine 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 mmmpa/learning_storage_engine 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-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mmmpa/learning_storage_engine:/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] fa198c7bf70161a02700131899a468b2ddd039bfe2f142acf37da0eb60960d0d [INFO] running `"docker" "start" "-a" "fa198c7bf70161a02700131899a468b2ddd039bfe2f142acf37da0eb60960d0d"` [INFO] [stderr] Compiling intrusive-collections v0.7.8 [INFO] [stderr] Compiling learning_storage_engine v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: unused `#[macro_use]` import [INFO] [stderr] --> src/main.rs:1:1 [INFO] [stderr] | [INFO] [stderr] 1 | #[macro_use] [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused imports: `DirEntry`, `ReadDir` [INFO] [stderr] --> src/hash_index_compaction.rs:2:28 [INFO] [stderr] | [INFO] [stderr] 2 | use std::fs::{OpenOptions, ReadDir, DirEntry, File}; [INFO] [stderr] | ^^^^^^^ ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Path` [INFO] [stderr] --> src/hash_index_compaction.rs:8:17 [INFO] [stderr] | [INFO] [stderr] 8 | use std::path::{Path, PathBuf}; [INFO] [stderr] | ^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `replace` [INFO] [stderr] --> src/hash_index_compaction.rs:9:22 [INFO] [stderr] | [INFO] [stderr] 9 | use std::mem::{swap, replace}; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `intrusive_collections::rbtree::RBTree` [INFO] [stderr] --> src/log_structured_merged_tree.rs:7:5 [INFO] [stderr] | [INFO] [stderr] 7 | use intrusive_collections::rbtree::RBTree; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused imports: `KeyAdapter`, `RBTreeLink` [INFO] [stderr] --> src/log_structured_merged_tree.rs:8:29 [INFO] [stderr] | [INFO] [stderr] 8 | use intrusive_collections::{RBTreeLink, KeyAdapter}; [INFO] [stderr] | ^^^^^^^^^^ ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `RangeBounds` [INFO] [stderr] --> src/log_structured_merged_tree.rs:11:16 [INFO] [stderr] | [INFO] [stderr] 11 | use std::ops::{RangeBounds, Range}; [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error[E0601]: `main` function not found in crate `learning_storage_engine` [INFO] [stderr] | [INFO] [stderr] = note: consider adding a `main` function to `src/main.rs` [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0601`. [INFO] [stderr] error: Could not compile `learning_storage_engine`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "fa198c7bf70161a02700131899a468b2ddd039bfe2f142acf37da0eb60960d0d"` [INFO] running `"docker" "rm" "-f" "fa198c7bf70161a02700131899a468b2ddd039bfe2f142acf37da0eb60960d0d"` [INFO] [stdout] fa198c7bf70161a02700131899a468b2ddd039bfe2f142acf37da0eb60960d0d