[INFO] crate flu 0.0.2 is already in cache
[INFO] extracting crate flu 0.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/flu/0.0.2
[INFO] extracting crate flu 0.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flu/0.0.2
[INFO] validating manifest of flu-0.0.2 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 flu-0.0.2 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 flu-0.0.2
[INFO] finished frobbing flu-0.0.2
[INFO] frobbed toml for flu-0.0.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/flu/0.0.2/Cargo.toml
[INFO] started frobbing flu-0.0.2
[INFO] finished frobbing flu-0.0.2
[INFO] frobbed toml for flu-0.0.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flu/0.0.2/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] 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing flu-0.0.2 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/flu/0.0.2:/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] f34f459003f028ee1fd5a24d217af39902112a3d160b9ee5381512dc150d094d
[INFO] running `"docker" "start" "-a" "f34f459003f028ee1fd5a24d217af39902112a3d160b9ee5381512dc150d094d"`
[INFO] [stderr]    Compiling pkg-config v0.3.15
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling flu v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'gcc::Config': gcc::Config has been renamed to gcc::Build
[INFO] [stderr]   --> build.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     gcc::Config::new()
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(deprecated)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'gcc::Build::new': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stderr]   --> build.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     gcc::Config::new()
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: dist/lua-5.1.5/src/lauxlib.c: In function 'luaL_loadfile':
[INFO] [stderr] warning: dist/lua-5.1.5/src/lauxlib.c:577:4: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
[INFO] [stderr] warning:     while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0]) ;
[INFO] [stderr] warning:     ^~~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/lauxlib.c:578:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
[INFO] [stderr] warning:      lf.extraline = 0;
[INFO] [stderr] warning:      ^~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltablib.c: In function 'addfield':
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltablib.c:137:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
[INFO] [stderr] warning:    if (!lua_isstring(L, -1))
[INFO] [stderr] warning:    ^~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltablib.c:140:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
[INFO] [stderr] warning:      luaL_addvalue(b);
[INFO] [stderr] warning:      ^~~~~~~~~~~~~
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(unboxed_closures)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:5:1
[INFO] [stderr]    |
[INFO] [stderr] 5  | / macro_rules! assert_enum {
[INFO] [stderr] 6  | |     (@as_expr $e:expr) => {$e};
[INFO] [stderr] 7  | |     (@as_pat $p:pat) => {$p};
[INFO] [stderr] 8  | |     ($left:expr, $($right:tt)*) => (
[INFO] [stderr] ...  |
[INFO] [stderr] 21 | |     )
[INFO] [stderr] 22 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `LuaRef`
[INFO] [stderr]  --> src/stack/push.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use LuaRef;
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `LuaValue`
[INFO] [stderr]  --> src/stack/read.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use LuaValue;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `LuaRef`
[INFO] [stderr]  --> src/stack/read.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use LuaRef;
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `nil`
[INFO] [stderr]  --> src/stack/read.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use nil;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `LuaValue`
[INFO] [stderr]  --> src/stack/size.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use LuaValue;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `LuaRef`
[INFO] [stderr]  --> src/stack/size.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use LuaRef;
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `nil`
[INFO] [stderr]  --> src/collections/table.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use nil;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::mem`
[INFO] [stderr]   --> src/collections/table.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | use std::mem;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Table`
[INFO] [stderr]  --> src/context.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use Table;
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `nil`
[INFO] [stderr]  --> src/value.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use nil;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Table`
[INFO] [stderr]  --> src/function.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use Table;
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `nil`
[INFO] [stderr]  --> src/function.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use nil;
[INFO] [stderr]   |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `nil` should have an upper camel case name
[INFO] [stderr]   --> src/lib.rs:40:12
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub struct nil;
[INFO] [stderr]    |            ^^^ help: convert the identifier to upper camel case: `Nil`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[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] The following warnings were emitted during compilation:
[INFO] [stderr] 
[INFO] [stderr] warning: dist/lua-5.1.5/src/lauxlib.c: In function 'luaL_loadfile':
[INFO] [stderr] warning: dist/lua-5.1.5/src/lauxlib.c:577:4: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
[INFO] [stderr] warning:     while ((c = getc(lf.f)) != EOF && c != LUA_SIGNATURE[0]) ;
[INFO] [stderr] warning:     ^~~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/lauxlib.c:578:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'while'
[INFO] [stderr] warning:      lf.extraline = 0;
[INFO] [stderr] warning:      ^~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltablib.c: In function 'addfield':
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltablib.c:137:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
[INFO] [stderr] warning:    if (!lua_isstring(L, -1))
[INFO] [stderr] warning:    ^~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltablib.c:140:5: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
[INFO] [stderr] warning:      luaL_addvalue(b);
[INFO] [stderr] warning:      ^~~~~~~~~~~~~
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `flu`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f34f459003f028ee1fd5a24d217af39902112a3d160b9ee5381512dc150d094d"`
[INFO] running `"docker" "rm" "-f" "f34f459003f028ee1fd5a24d217af39902112a3d160b9ee5381512dc150d094d"`
[INFO] [stdout] f34f459003f028ee1fd5a24d217af39902112a3d160b9ee5381512dc150d094d