[INFO] cloning repository https://github.com/lights0123/n-flashcards
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lights0123/n-flashcards" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flights0123%2Fn-flashcards", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flights0123%2Fn-flashcards'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 02f89be2aaad202bdb4641ae47b2d9bb75b19748
[INFO] testing lights0123/n-flashcards against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flights0123%2Fn-flashcards" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lights0123/n-flashcards on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lights0123/n-flashcards
[INFO] finished tweaking git repo https://github.com/lights0123/n-flashcards
[INFO] tweaked toml for git repo https://github.com/lights0123/n-flashcards written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/lights0123/n-flashcards already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ndless v0.6.1
[INFO] [stderr]   Downloaded ndless-static-vars v1.0.0
[INFO] [stderr]   Downloaded ndless-macros v0.1.1
[INFO] [stderr]   Downloaded ndless-handler v0.2.0
[INFO] [stderr]   Downloaded cty v0.2.0
[INFO] [stderr]   Downloaded ndless-static-vars v2.0.1
[INFO] [stderr]   Downloaded ndless-sys v0.1.3
[INFO] [stderr]   Downloaded ndless-sdl v0.1.8
[INFO] [stderr]   Downloaded ndless-macros v0.3.0
[INFO] [stderr]   Downloaded ndless v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d17e997c9f27bc1a7a08295339268b670915bbdffd6a2ed755adf25947f79f91
[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" "d17e997c9f27bc1a7a08295339268b670915bbdffd6a2ed755adf25947f79f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d17e997c9f27bc1a7a08295339268b670915bbdffd6a2ed755adf25947f79f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d17e997c9f27bc1a7a08295339268b670915bbdffd6a2ed755adf25947f79f91", kill_on_drop: false }`
[INFO] [stdout] d17e997c9f27bc1a7a08295339268b670915bbdffd6a2ed755adf25947f79f91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef3eb7ab7dac104ef46439b3da6c2c2c36961468fa70bc84cfa02967d7d56905
[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" "ef3eb7ab7dac104ef46439b3da6c2c2c36961468fa70bc84cfa02967d7d56905", kill_on_drop: false }`
[INFO] [stderr]    Compiling cty v0.1.5
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling cty v0.2.0
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling ndless-static-vars v1.0.0
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stdout] error[E0412]: cannot find type `Vec` in this scope
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ndless-static-vars-1.0.0/src/lib.rs:7:34
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub static mut ARGUMENTS: Option<Vec<String>> = None;
[INFO] [stdout]   |                                  ^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 5 | use alloc::vec::Vec;
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::v1::Vec;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0412]: cannot find type `String` in this scope
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ndless-static-vars-1.0.0/src/lib.rs:7:38
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub static mut ARGUMENTS: Option<Vec<String>> = None;
[INFO] [stdout]   |                                      ^^^^^^ not found in this scope
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing one of these items
[INFO] [stdout]   |
[INFO] [stdout] 5 | use alloc::string::String;
[INFO] [stdout]   |
[INFO] [stdout] 5 | use crate::v1::String;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature 'alloc_prelude'
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ndless-static-vars-1.0.0/src/lib.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use alloc::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #58935 <https://github.com/rust-lang/rust/issues/58935> for more information
[INFO] [stdout]   = help: add `#![feature(alloc_prelude)]` to the crate attributes to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0412, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0412`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ndless-static-vars`.
[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" "ef3eb7ab7dac104ef46439b3da6c2c2c36961468fa70bc84cfa02967d7d56905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef3eb7ab7dac104ef46439b3da6c2c2c36961468fa70bc84cfa02967d7d56905", kill_on_drop: false }`
[INFO] [stdout] ef3eb7ab7dac104ef46439b3da6c2c2c36961468fa70bc84cfa02967d7d56905