[INFO] updating cached repository https://github.com/museun/rcc
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8d53bc74192718a2c9dddf1ad8648da5eb7f5a91
[INFO] testing museun/rcc against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmuseun%2Frcc" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/museun/rcc on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/museun/rcc
[INFO] finished tweaking git repo https://github.com/museun/rcc
[INFO] tweaked toml for git repo https://github.com/museun/rcc written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/museun/rcc already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 388b162cc615e3439efbe05577effbf11b0cf02f281c81d5ab3d66a9eedbef7a
[INFO] running `"docker" "start" "-a" "388b162cc615e3439efbe05577effbf11b0cf02f281c81d5ab3d66a9eedbef7a"`
[INFO] [stderr]    Compiling rcc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> build.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 | /     writeln!(
[INFO] [stderr] 36 | |         f,
[INFO] [stderr] 37 | |         r###"#[test]
[INFO] [stderr] 38 | | fn test_{:04}() {{
[INFO] [stderr] ...  |
[INFO] [stderr] 46 | |         n, source, expected, n, n
[INFO] [stderr] 47 | |     );
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> build.rs:77:5
[INFO] [stderr]    |
[INFO] [stderr] 77 |     write!(f, "{}", "// nothing to see here");
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `cyclomatic_complexity`
[INFO] [stderr]  --> src/semantics.rs:1:10
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![allow(cyclomatic_complexity)]
[INFO] [stderr]   |          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unknown_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(nll)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lexer.rs:238:32
[INFO] [stderr]     |
[INFO] [stderr] 238 |                             '0'...'7' => true,
[INFO] [stderr]     |                                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> src/lexer.rs:357:12
[INFO] [stderr]     |
[INFO] [stderr] 357 |         '0'...'3' => Some(ch),
[INFO] [stderr]     |            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rcc`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "388b162cc615e3439efbe05577effbf11b0cf02f281c81d5ab3d66a9eedbef7a"`
[INFO] running `"docker" "rm" "-f" "388b162cc615e3439efbe05577effbf11b0cf02f281c81d5ab3d66a9eedbef7a"`
[INFO] [stdout] 388b162cc615e3439efbe05577effbf11b0cf02f281c81d5ab3d66a9eedbef7a