[INFO] crate suffix_cmd 0.1.33 is already in cache
[INFO] extracting crate suffix_cmd 0.1.33 into work/ex/beta-1.38-1/sources/1.37.0/reg/suffix_cmd/0.1.33
[INFO] extracting crate suffix_cmd 0.1.33 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/suffix_cmd/0.1.33
[INFO] validating manifest of suffix_cmd-0.1.33 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of suffix_cmd-0.1.33 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing suffix_cmd-0.1.33
[INFO] removed path dependency suffix from suffix_cmd-0.1.33
[INFO] finished frobbing suffix_cmd-0.1.33
[INFO] frobbed toml for suffix_cmd-0.1.33 written to work/ex/beta-1.38-1/sources/1.37.0/reg/suffix_cmd/0.1.33/Cargo.toml
[INFO] started frobbing suffix_cmd-0.1.33
[INFO] removed path dependency suffix from suffix_cmd-0.1.33
[INFO] finished frobbing suffix_cmd-0.1.33
[INFO] frobbed toml for suffix_cmd-0.1.33 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/suffix_cmd/0.1.33/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing suffix_cmd-0.1.33 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/suffix_cmd/0.1.33:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 9b044d38a7834d3f4ccf5d0a2238e72ae9bf4977a553b2647703cd49b1f8464b
[INFO] running `"docker" "start" "-a" "9b044d38a7834d3f4ccf5d0a2238e72ae9bf4977a553b2647703cd49b1f8464b"`
[INFO] [stderr]    Compiling rustc-serialize v0.2.13
[INFO] [stderr] error: expected expression, found `]`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/serialize.rs:331:26
[INFO] [stderr]     |
[INFO] [stderr] 331 |         s.emit_str(&self[])
[INFO] [stderr]     |                          ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: expected expression, found `]`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/json.rs:1046:44
[INFO] [stderr]      |
[INFO] [stderr] 1046 |             Json::String(ref s) => Some(&s[]),
[INFO] [stderr]      |                                            ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: expected expression, found `]`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/json.rs:2141:63
[INFO] [stderr]      |
[INFO] [stderr] 2141 |         let idx = match names.iter().position(|n| *n == &name[]) {
[INFO] [stderr]      |                   ----- while parsing this match expression   ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: expected expression, found `]`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/json.rs:3367:43
[INFO] [stderr]      |
[INFO] [stderr] 3367 |         let json_str = from_utf8(&mem_buf[]).unwrap();
[INFO] [stderr]      |                                           ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: expected expression, found `]`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/json.rs:3383:43
[INFO] [stderr]      |
[INFO] [stderr] 3383 |         let json_str = from_utf8(&mem_buf[]).unwrap();
[INFO] [stderr]      |                                           ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: expected expression, found `]`
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/json.rs:3423:45
[INFO] [stderr]      |
[INFO] [stderr] 3423 |             let printed = from_utf8(&writer[]).unwrap();
[INFO] [stderr]      |                                             ^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `us` for integer literal
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/json.rs:3817:42
[INFO] [stderr]      |
[INFO] [stderr] 3817 |         tree_map.insert("a".to_string(), 1us);
[INFO] [stderr]      |                                          ^^^ invalid suffix `us`
[INFO] [stderr]      |
[INFO] [stderr]      = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error: invalid suffix `us` for integer literal
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/json.rs:3821:42
[INFO] [stderr]      |
[INFO] [stderr] 3821 |         hash_map.insert("a".to_string(), 1us);
[INFO] [stderr]      |                                          ^^^ invalid suffix `us`
[INFO] [stderr]      |
[INFO] [stderr]      = help: the suffix must be one of the integral types (`u32`, `isize`, etc)
[INFO] [stderr] 
[INFO] [stderr] error[E0463]: can't find crate for `unicode`
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.13/src/lib.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | extern crate unicode;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 9 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `rustc-serialize`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9b044d38a7834d3f4ccf5d0a2238e72ae9bf4977a553b2647703cd49b1f8464b"`
[INFO] running `"docker" "rm" "-f" "9b044d38a7834d3f4ccf5d0a2238e72ae9bf4977a553b2647703cd49b1f8464b"`
[INFO] [stdout] 9b044d38a7834d3f4ccf5d0a2238e72ae9bf4977a553b2647703cd49b1f8464b