[INFO] crate taskpipe 0.1.2 is already in cache
[INFO] extracting crate taskpipe 0.1.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/taskpipe/0.1.2
[INFO] extracting crate taskpipe 0.1.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/taskpipe/0.1.2
[INFO] validating manifest of taskpipe-0.1.2 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 taskpipe-0.1.2 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 taskpipe-0.1.2
[INFO] finished frobbing taskpipe-0.1.2
[INFO] frobbed toml for taskpipe-0.1.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/taskpipe/0.1.2/Cargo.toml
[INFO] started frobbing taskpipe-0.1.2
[INFO] finished frobbing taskpipe-0.1.2
[INFO] frobbed toml for taskpipe-0.1.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/taskpipe/0.1.2/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 taskpipe-0.1.2 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/taskpipe/0.1.2:/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] 491c8b7707e08705a67350ca449022ea1baea6821f9de16fc664c61603e0199a
[INFO] running `"docker" "start" "-a" "491c8b7707e08705a67350ca449022ea1baea6821f9de16fc664c61603e0199a"`
[INFO] [stderr]    Compiling taskpipe v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::thread::JoinGuard`
[INFO] [stderr]  --> src/lib.rs:6:26
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::thread::{Thread,JoinGuard};
[INFO] [stderr]   |                          ^^^^^^^^^ no `JoinGuard` in `thread`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `spawn` found for type `std::thread::Thread` in the current scope
[INFO] [stderr]   --> src/lib.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |     Thread::spawn(move || {
[INFO] [stderr]    |             ^^^^^ function or associated item not found in `std::thread::Thread`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `spawn` found for type `std::thread::Thread` in the current scope
[INFO] [stderr]   --> src/lib.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 |         Thread::spawn(move || {
[INFO] [stderr]    |                 ^^^^^ function or associated item not found in `std::thread::Thread`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `spawn` found for type `std::thread::Thread` in the current scope
[INFO] [stderr]   --> src/lib.rs:66:17
[INFO] [stderr]    |
[INFO] [stderr] 66 |         Thread::spawn(move || {
[INFO] [stderr]    |                 ^^^^^ function or associated item not found in `std::thread::Thread`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `spawn` found for type `std::thread::Thread` in the current scope
[INFO] [stderr]   --> src/lib.rs:92:17
[INFO] [stderr]    |
[INFO] [stderr] 92 |         Thread::spawn(move || {
[INFO] [stderr]    |                 ^^^^^ function or associated item not found in `std::thread::Thread`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `scoped` found for type `std::thread::Thread` in the current scope
[INFO] [stderr]    --> src/lib.rs:133:17
[INFO] [stderr]     |
[INFO] [stderr] 133 |         Thread::scoped(move || {
[INFO] [stderr]     |                 ^^^^^^ function or associated item not found in `std::thread::Thread`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `taskpipe`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "491c8b7707e08705a67350ca449022ea1baea6821f9de16fc664c61603e0199a"`
[INFO] running `"docker" "rm" "-f" "491c8b7707e08705a67350ca449022ea1baea6821f9de16fc664c61603e0199a"`
[INFO] [stdout] 491c8b7707e08705a67350ca449022ea1baea6821f9de16fc664c61603e0199a