[INFO] fetching crate tikv-client 0.2.0...
[INFO] checking tikv-client-0.2.0 against try#23ffd2897cbb44320ca18dfe4d05dbacb37d55e0 for pr-115950
[INFO] extracting crate tikv-client 0.2.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate tikv-client 0.2.0 on toolchain 23ffd2897cbb44320ca18dfe4d05dbacb37d55e0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tikv-client 0.2.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate tikv-client 0.2.0
[INFO] tweaked toml for crates.io crate tikv-client 0.2.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate tikv-client 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7033cc39170e877e74653de2880c5243120dfeb088861804a5a21c91d9c1273e
[INFO] running `Command { std: "docker" "start" "-a" "7033cc39170e877e74653de2880c5243120dfeb088861804a5a21c91d9c1273e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7033cc39170e877e74653de2880c5243120dfeb088861804a5a21c91d9c1273e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7033cc39170e877e74653de2880c5243120dfeb088861804a5a21c91d9c1273e", kill_on_drop: false }`
[INFO] [stdout] 7033cc39170e877e74653de2880c5243120dfeb088861804a5a21c91d9c1273e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4f8da3c744d2da974e54ce020a79f4ad54313e914ebeaab8fc086f07e8d8b066" "/opt/rustwide/cargo-home/bin/cargo" "+23ffd2897cbb44320ca18dfe4d05dbacb37d55e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5876502e3fea1cf5e68de58397340689a2b0a2e12ebf08ae7763174bd748d9f5
[INFO] running `Command { std: "docker" "start" "-a" "5876502e3fea1cf5e68de58397340689a2b0a2e12ebf08ae7763174bd748d9f5", kill_on_drop: false }`
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[INFO] [stderr]    Compiling tikv-client v0.2.0 (/opt/rustwide/workdir)
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[INFO] [stdout] error[E0499]: cannot borrow `buffer` as mutable more than once at a time
[INFO] [stdout]    --> src/transaction/buffer.rs:487:27
[INFO] [stdout]     |
[INFO] [stdout] 483 |             buffer.batch_get_or_else(vec![k1.clone(), k2.clone()].into_iter(), move |_| {
[INFO] [stdout]     |             ------ first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 487 |         let r2 = block_on(buffer.get_or_else(k2.clone(), move |_| ready(Err(internal_err!("")))));
[INFO] [stdout]     |                           ^^^^^^ second mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 493 |         assert_eq!(r1.unwrap().collect::<Vec<_>>(), vec![
[INFO] [stdout]     |                    -- first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0499]: cannot borrow `buffer` as mutable more than once at a time
[INFO] [stdout]    --> src/transaction/buffer.rs:489:13
[INFO] [stdout]     |
[INFO] [stdout] 483 |             buffer.batch_get_or_else(vec![k1.clone(), k2.clone()].into_iter(), move |_| {
[INFO] [stdout]     |             ------ first mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 489 |             buffer.batch_get_or_else(vec![k1.clone(), k2.clone()].into_iter(), move |_| {
[INFO] [stdout]     |             ^^^^^^ second mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 493 |         assert_eq!(r1.unwrap().collect::<Vec<_>>(), vec![
[INFO] [stdout]     |                    -- first borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0499`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tikv-client` (lib test) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5876502e3fea1cf5e68de58397340689a2b0a2e12ebf08ae7763174bd748d9f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5876502e3fea1cf5e68de58397340689a2b0a2e12ebf08ae7763174bd748d9f5", kill_on_drop: false }`
[INFO] [stdout] 5876502e3fea1cf5e68de58397340689a2b0a2e12ebf08ae7763174bd748d9f5