[INFO] fetching crate overloadf 0.1.7...
[INFO] checking overloadf-0.1.7 against master#9fa580b1175018b0a276b0bc68f9827a106f7260 for pr-82565
[INFO] extracting crate overloadf 0.1.7 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate overloadf 0.1.7 on toolchain 9fa580b1175018b0a276b0bc68f9827a106f7260
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate overloadf 0.1.7
[INFO] finished tweaking crates.io crate overloadf 0.1.7
[INFO] tweaked toml for crates.io crate overloadf 0.1.7 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4f80a464703df1d3a31af5c9ba6d7a714cf70f61b8f27d06b2b6ad056dfe29c5
[INFO] running `Command { std: "docker" "start" "-a" "4f80a464703df1d3a31af5c9ba6d7a714cf70f61b8f27d06b2b6ad056dfe29c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f80a464703df1d3a31af5c9ba6d7a714cf70f61b8f27d06b2b6ad056dfe29c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f80a464703df1d3a31af5c9ba6d7a714cf70f61b8f27d06b2b6ad056dfe29c5", kill_on_drop: false }`
[INFO] [stdout] 4f80a464703df1d3a31af5c9ba6d7a714cf70f61b8f27d06b2b6ad056dfe29c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+9fa580b1175018b0a276b0bc68f9827a106f7260" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c34c3488d6b4c67d83e81db90c7fea6f1baf118699f1fa69c1754e23908f0aeb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c34c3488d6b4c67d83e81db90c7fea6f1baf118699f1fa69c1754e23908f0aeb", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.63
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]     Checking futures-sink v0.3.13
[INFO] [stderr]     Checking futures-core v0.3.13
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking futures-task v0.3.13
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]     Checking futures-io v0.3.13
[INFO] [stderr]     Checking futures-channel v0.3.13
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling futures-macro v0.3.13
[INFO] [stderr]    Compiling overloadf_derive v0.1.7
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/overloadf_derive-0.1.7/src/lib.rs:172:62
[INFO] [stdout]     |
[INFO] [stdout] 172 | fn get_output(ast: &syn::ReturnType, tp: &syn::Type) -> syn::export::TokenStream2 {
[INFO] [stdout]     |                                                              ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/overloadf_derive-0.1.7/src/lib.rs:332:11
[INFO] [stdout]     |
[INFO] [stdout] 332 | ) -> syn::export::TokenStream2 {
[INFO] [stdout]     |           ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/overloadf_derive-0.1.7/src/lib.rs:427:11
[INFO] [stdout]     |
[INFO] [stdout] 427 | ) -> syn::export::TokenStream2 {
[INFO] [stdout]     |           ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/overloadf_derive-0.1.7/src/lib.rs:541:11
[INFO] [stdout]     |
[INFO] [stdout] 541 | ) -> syn::export::TokenStream2 {
[INFO] [stdout]     |           ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `overloadf_derive`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c34c3488d6b4c67d83e81db90c7fea6f1baf118699f1fa69c1754e23908f0aeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c34c3488d6b4c67d83e81db90c7fea6f1baf118699f1fa69c1754e23908f0aeb", kill_on_drop: false }`
[INFO] [stdout] c34c3488d6b4c67d83e81db90c7fea6f1baf118699f1fa69c1754e23908f0aeb