[INFO] fetching crate flu 0.0.2...
[INFO] documenting flu-0.0.2 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate flu 0.0.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate flu 0.0.2 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flu 0.0.2
[INFO] finished tweaking crates.io crate flu 0.0.2
[INFO] tweaked toml for crates.io crate flu 0.0.2 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c5c27fa84914e6340c25ef0311c40586553e1866d3bff0749c586251b1b7b744
[INFO] running `Command { std: "docker" "start" "-a" "c5c27fa84914e6340c25ef0311c40586553e1866d3bff0749c586251b1b7b744", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5c27fa84914e6340c25ef0311c40586553e1866d3bff0749c586251b1b7b744", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5c27fa84914e6340c25ef0311c40586553e1866d3bff0749c586251b1b7b744", kill_on_drop: false }`
[INFO] [stdout] c5c27fa84914e6340c25ef0311c40586553e1866d3bff0749c586251b1b7b744
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "RUSTDOCFLAGS=--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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3ae139d90f6e53a56c16841f2fa1d0af38d7fb8942b5f51452c0fd2bc0b4bd5
[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" "b3ae139d90f6e53a56c16841f2fa1d0af38d7fb8942b5f51452c0fd2bc0b4bd5", kill_on_drop: false }`
[INFO] [stderr]    Compiling flu v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated item 'gcc::Config': gcc::Config has been renamed to gcc::Build
[INFO] [stdout]   --> build.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     gcc::Config::new()
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'gcc::Build::new': crate has been renamed to `cc`, the `gcc` name is not maintained
[INFO] [stdout]   --> build.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     gcc::Config::new()
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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:   577 |    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 were guarded by the 'while'
[INFO] [stderr] warning:   578 |     lf.extraline = 0;
[INFO] [stderr] warning:       |     ^~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c: In function 'symbexec':
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c:268:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
[INFO] [stderr] warning:   268 | #define check(x)  if (!(x)) return 0;
[INFO] [stderr] warning:       |                      ^
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c:272:26: note: in expansion of macro 'check'
[INFO] [stderr] warning:   272 | #define checkreg(pt,reg) check((reg) < (pt)->maxstacksize)
[INFO] [stderr] warning:       |                          ^~~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c:414:9: note: in expansion of macro 'checkreg'
[INFO] [stderr] warning:   414 |         checkreg(pt, a+3);
[INFO] [stderr] warning:       |         ^~~~~~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c:416:7: note: here
[INFO] [stderr] warning:   416 |       case OP_JMP: {
[INFO] [stderr] warning:       |       ^~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/llex.c: In function 'llex':
[INFO] [stderr] warning: dist/lua-5.1.5/src/llex.c:369:14: warning: this statement may fall through [-Wimplicit-fallthrough=]
[INFO] [stderr] warning:   369 |         else luaX_lexerror(ls, "invalid long string delimiter", TK_STRING);
[INFO] [stderr] warning:       |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/llex.c:371:7: note: here
[INFO] [stderr] warning:   371 |       case '=': {
[INFO] [stderr] warning:       |       ^~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltable.c: In function 'luaH_get':
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltable.c:473:23: warning: this statement may fall through [-Wimplicit-fallthrough=]
[INFO] [stderr] warning:   473 |     case LUA_TNUMBER: {
[INFO] [stderr] warning:       |                       ^
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltable.c:481:5: note: here
[INFO] [stderr] warning:   481 |     default: {
[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:   137 |   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 were guarded by the 'if'
[INFO] [stderr] warning:   140 |     luaL_addvalue(b);
[INFO] [stderr] warning:       |     ^~~~~~~~~~~~~
[INFO] [stderr]  Documenting flu v0.0.2 (/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(unboxed_closures)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[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:   577 |    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 were guarded by the 'while'
[INFO] [stderr] warning:   578 |     lf.extraline = 0;
[INFO] [stderr] warning:       |     ^~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c: In function 'symbexec':
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c:268:22: warning: this statement may fall through [-Wimplicit-fallthrough=]
[INFO] [stderr] warning:   268 | #define check(x)  if (!(x)) return 0;
[INFO] [stderr] warning:       |                      ^
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c:272:26: note: in expansion of macro 'check'
[INFO] [stderr] warning:   272 | #define checkreg(pt,reg) check((reg) < (pt)->maxstacksize)
[INFO] [stderr] warning:       |                          ^~~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c:414:9: note: in expansion of macro 'checkreg'
[INFO] [stderr] warning:   414 |         checkreg(pt, a+3);
[INFO] [stderr] warning:       |         ^~~~~~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ldebug.c:416:7: note: here
[INFO] [stderr] warning:   416 |       case OP_JMP: {
[INFO] [stderr] warning:       |       ^~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/llex.c: In function 'llex':
[INFO] [stderr] warning: dist/lua-5.1.5/src/llex.c:369:14: warning: this statement may fall through [-Wimplicit-fallthrough=]
[INFO] [stderr] warning:   369 |         else luaX_lexerror(ls, "invalid long string delimiter", TK_STRING);
[INFO] [stderr] warning:       |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/llex.c:371:7: note: here
[INFO] [stderr] warning:   371 |       case '=': {
[INFO] [stderr] warning:       |       ^~~~
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltable.c: In function 'luaH_get':
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltable.c:473:23: warning: this statement may fall through [-Wimplicit-fallthrough=]
[INFO] [stderr] warning:   473 |     case LUA_TNUMBER: {
[INFO] [stderr] warning:       |                       ^
[INFO] [stderr] warning: dist/lua-5.1.5/src/ltable.c:481:5: note: here
[INFO] [stderr] warning:   481 |     default: {
[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:   137 |   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 were guarded by the 'if'
[INFO] [stderr] warning:   140 |     luaL_addvalue(b);
[INFO] [stderr] warning:       |     ^~~~~~~~~~~~~
[INFO] [stderr] 
[INFO] [stderr] error: Could not document `flu`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name flu src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern libc=/opt/rustwide/target/debug/deps/liblibc-1ad3ad1e20beb97f.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "b3ae139d90f6e53a56c16841f2fa1d0af38d7fb8942b5f51452c0fd2bc0b4bd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3ae139d90f6e53a56c16841f2fa1d0af38d7fb8942b5f51452c0fd2bc0b4bd5", kill_on_drop: false }`
[INFO] [stdout] b3ae139d90f6e53a56c16841f2fa1d0af38d7fb8942b5f51452c0fd2bc0b4bd5