[INFO] cloning repository https://github.com/rmanoka/tygres-macros
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rmanoka/tygres-macros" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frmanoka%2Ftygres-macros", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frmanoka%2Ftygres-macros'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b22905c0eb1951b2e61297af7ab88fa3d3d417bd
[INFO] testing rmanoka/tygres-macros against 1.49.0 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frmanoka%2Ftygres-macros" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rmanoka/tygres-macros on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rmanoka/tygres-macros
[INFO] finished tweaking git repo https://github.com/rmanoka/tygres-macros
[INFO] tweaked toml for git repo https://github.com/rmanoka/tygres-macros written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/rmanoka/tygres-macros already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91ee4766ca4a2337bbea3f72799a11403b15086bc4d0a0f623094c5c5c68be8b
[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" "91ee4766ca4a2337bbea3f72799a11403b15086bc4d0a0f623094c5c5c68be8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91ee4766ca4a2337bbea3f72799a11403b15086bc4d0a0f623094c5c5c68be8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91ee4766ca4a2337bbea3f72799a11403b15086bc4d0a0f623094c5c5c68be8b", kill_on_drop: false }`
[INFO] [stdout] 91ee4766ca4a2337bbea3f72799a11403b15086bc4d0a0f623094c5c5c68be8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=warn" "-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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eb25e1badd04db65aad42360a58a8388e46948c6876a3676ea6e99d91e8b4584
[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" "eb25e1badd04db65aad42360a58a8388e46948c6876a3676ea6e99d91e8b4584", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.25
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling memchr v2.1.3
[INFO] [stderr]    Compiling regex v1.1.0
[INFO] [stderr]    Compiling ident_case v1.0.0
[INFO] [stderr]    Compiling regex-syntax v0.6.4
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling syn v0.15.26
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling Inflector v0.11.3
[INFO] [stderr]    Compiling darling_core v0.8.2
[INFO] [stderr]    Compiling darling_macro v0.8.2
[INFO] [stderr]    Compiling darling v0.8.2
[INFO] [stderr]    Compiling tygres-macros v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(extern_crate_item_prelude, arbitrary_self_types)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Field`, `Type`
[INFO] [stdout]  --> src/builder.rs:3:28
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Ident, TypeParamBound, Field, Type,
[INFO] [stdout]   |                            ^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Field`, `TypeParamBound`
[INFO] [stdout]    --> src/schema.rs:219:12
[INFO] [stdout]     |
[INFO] [stdout] 219 |     Ident, TypeParamBound, Field, Type,
[INFO] [stdout]     |            ^^^^^^^^^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `token`
[INFO] [stdout]    --> src/setter.rs:228:8
[INFO] [stdout]     |
[INFO] [stdout] 228 |     *, token,
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `token`
[INFO] [stdout]   --> src/getter.rs:91:8
[INFO] [stdout]    |
[INFO] [stdout] 91 |     *, token,
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `punctuated::Punctuated`, `token`
[INFO] [stdout]    --> src/data.rs:100:8
[INFO] [stdout]     |
[INFO] [stdout] 100 |     *, token,
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 101 |     punctuated::Punctuated,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/attrs.rs:63:12
[INFO] [stdout]    |
[INFO] [stdout] 63 |         if (path.segments.len() != 1) { return false; }
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `TokenStream`
[INFO] [stdout]   --> src/attrs.rs:90:19
[INFO] [stdout]    |
[INFO] [stdout] 90 | use proc_macro2::{TokenStream, Literal};
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Field`, `TypeParamBound`, `Type`, `token`
[INFO] [stdout]   --> src/attrs.rs:92:15
[INFO] [stdout]    |
[INFO] [stdout] 92 |     *, Ident, TypeParamBound, Field, Type,
[INFO] [stdout]    |               ^^^^^^^^^^^^^^  ^^^^^  ^^^^
[INFO] [stdout] 93 |     punctuated::Punctuated,
[INFO] [stdout] 94 |     token,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tygres-macros`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "eb25e1badd04db65aad42360a58a8388e46948c6876a3676ea6e99d91e8b4584", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb25e1badd04db65aad42360a58a8388e46948c6876a3676ea6e99d91e8b4584", kill_on_drop: false }`
[INFO] [stdout] eb25e1badd04db65aad42360a58a8388e46948c6876a3676ea6e99d91e8b4584