[INFO] fetching crate ImtiazGermain 0.1.2...
[INFO] checking ImtiazGermain-0.1.2 against master#e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682 for beta-170-4
[INFO] extracting crate ImtiazGermain 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate ImtiazGermain 0.1.2 on toolchain e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ImtiazGermain 0.1.2
[INFO] finished tweaking crates.io crate ImtiazGermain 0.1.2
[INFO] tweaked toml for crates.io crate ImtiazGermain 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28707c4a444bb12a89c8d008b55ad431934ee861e88dfb19c759df1ab5c842e8
[INFO] running `Command { std: "docker" "start" "-a" "28707c4a444bb12a89c8d008b55ad431934ee861e88dfb19c759df1ab5c842e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28707c4a444bb12a89c8d008b55ad431934ee861e88dfb19c759df1ab5c842e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28707c4a444bb12a89c8d008b55ad431934ee861e88dfb19c759df1ab5c842e8", kill_on_drop: false }`
[INFO] [stdout] 28707c4a444bb12a89c8d008b55ad431934ee861e88dfb19c759df1ab5c842e8
[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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9425bcf6f0f9cb96eed907565a6f10add7d8359b599bfb565705e6376b99d76b
[INFO] running `Command { std: "docker" "start" "-a" "9425bcf6f0f9cb96eed907565a6f10add7d8359b599bfb565705e6376b99d76b", kill_on_drop: false }`
[INFO] [stderr]     Checking ImtiazGermain v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `isgermainprime` is never used
[INFO] [stdout]  --> src/primecheck/isgermainprime.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn isgermainprime(n: u64) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_prime` is never used
[INFO] [stdout]   --> src/primecheck/isgermainprime.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_prime(n: u64) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `isimtiazgermainprime` is never used
[INFO] [stdout]  --> src/primecheck/isimtiazgermainprime.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn isimtiazgermainprime(n: u64) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_prime` is never used
[INFO] [stdout]   --> src/primecheck/isimtiazgermainprime.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn is_prime(n: u64) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `ImtiazGermain` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `imtiaz_germain`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `isgermainprime` is never used
[INFO] [stdout]  --> src/primecheck/isgermainprime.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn isgermainprime(n: u64) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_prime` is never used
[INFO] [stdout]   --> src/primecheck/isgermainprime.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn is_prime(n: u64) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `isimtiazgermainprime` is never used
[INFO] [stdout]  --> src/primecheck/isimtiazgermainprime.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn isimtiazgermainprime(n: u64) -> bool {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `is_prime` is never used
[INFO] [stdout]   --> src/primecheck/isimtiazgermainprime.rs:20:4
[INFO] [stdout]    |
[INFO] [stdout] 20 | fn is_prime(n: u64) -> bool {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `ImtiazGermain` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `imtiaz_germain`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `read_to_string` found for struct `ChildStdout` in the current scope
[INFO] [stdout]   --> tests/integration_tests.rs:22:34
[INFO] [stdout]    |
[INFO] [stdout] 22 |     child.stdout.take().unwrap().read_to_string(&mut output).unwrap();
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^ method not found in `ChildStdout`
[INFO] [stdout]   --> /rustc/e6e4f7ed1589e03bc2f6c5931c1a72e7947e8682/library/std/src/io/mod.rs:769:8
[INFO] [stdout]    |
[INFO] [stdout]    = note: the method is available for `ChildStdout` here
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]    |
[INFO] [stdout] 1  + use std::io::Read;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ImtiazGermain` (test "integration_tests") due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9425bcf6f0f9cb96eed907565a6f10add7d8359b599bfb565705e6376b99d76b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9425bcf6f0f9cb96eed907565a6f10add7d8359b599bfb565705e6376b99d76b", kill_on_drop: false }`
[INFO] [stdout] 9425bcf6f0f9cb96eed907565a6f10add7d8359b599bfb565705e6376b99d76b
