[INFO] cloning repository https://github.com/Ryan1729IsParanoidAboutWriteAccess/rote [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ryan1729IsParanoidAboutWriteAccess/rote" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyan1729IsParanoidAboutWriteAccess%2Frote", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyan1729IsParanoidAboutWriteAccess%2Frote'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] fbe20e4627c1b63d2af7141dcffd424563b8fe9f [INFO] testing Ryan1729IsParanoidAboutWriteAccess/rote against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRyan1729IsParanoidAboutWriteAccess%2Frote" "/workspace/builds/worker-8/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Ryan1729IsParanoidAboutWriteAccess/rote on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/Ryan1729IsParanoidAboutWriteAccess/rote [INFO] finished tweaking git repo https://github.com/Ryan1729IsParanoidAboutWriteAccess/rote [INFO] tweaked toml for git repo https://github.com/Ryan1729IsParanoidAboutWriteAccess/rote written to /workspace/builds/worker-8/source/Cargo.toml [INFO] crate git repo https://github.com/Ryan1729IsParanoidAboutWriteAccess/rote already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating git repository `https://github.com/TyOverby/flame.git` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded ab_glyph_rasterizer v0.1.3 [INFO] [stderr] Downloaded rusty-fork v0.3.0 [INFO] [stderr] Downloaded tree-sitter v0.16.1 [INFO] [stderr] Downloaded tinytemplate v1.0.4 [INFO] [stderr] Downloaded flame v0.2.2 [INFO] [stderr] Downloaded ab_glyph v0.2.5 [INFO] [stderr] Downloaded wait-timeout v0.2.0 [INFO] [stderr] Downloaded vec1 v1.5.0 [INFO] [stderr] Downloaded proptest v0.10.0 [INFO] [stderr] Downloaded ctor v0.1.14 [INFO] [stderr] Downloaded glyph_brush_draw_cache v0.1.1 [INFO] [stderr] Downloaded spin_sleep v0.3.7 [INFO] [stderr] Downloaded ropey v1.1.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ce41b1df923b760d4c77c3a1208a57370743c7b27574cd7165635dddc2865819 [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" "ce41b1df923b760d4c77c3a1208a57370743c7b27574cd7165635dddc2865819", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ce41b1df923b760d4c77c3a1208a57370743c7b27574cd7165635dddc2865819", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ce41b1df923b760d4c77c3a1208a57370743c7b27574cd7165635dddc2865819", kill_on_drop: false }` [INFO] [stdout] ce41b1df923b760d4c77c3a1208a57370743c7b27574cd7165635dddc2865819 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5a8b323404f43f47fa70fcfcd110f7fe684ee9482db8f79aa9311c0e41c1b216 [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" "5a8b323404f43f47fa70fcfcd110f7fe684ee9482db8f79aa9311c0e41c1b216", kill_on_drop: false }` [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Compiling rustc-hash v1.1.0 [INFO] [stderr] Compiling macros v0.1.0 (/opt/rustwide/workdir/libs/macros) [INFO] [stderr] Compiling perf_viz_proc_macro v0.1.0 (/opt/rustwide/workdir/libs/perf_viz/libs/perf_viz_proc_macro) [INFO] [stderr] Compiling proc-macro2 v1.0.17 [INFO] [stderr] Compiling syn v1.0.27 [INFO] [stderr] Compiling vec1 v1.5.0 [INFO] [stderr] Compiling is_linebreak_char v0.1.0 (/opt/rustwide/workdir/libs/is_linebreak_char) [INFO] [stderr] Compiling khronos_api v3.1.0 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling linked-hash-map v0.5.3 [INFO] [stderr] Compiling void v1.0.2 [INFO] [stderr] Compiling pkg-config v0.3.17 [INFO] [stderr] Compiling same-file v1.0.6 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Compiling downcast-rs v1.1.1 [INFO] [stderr] Compiling xdg v2.2.0 [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling instant v0.1.4 [INFO] [stderr] Compiling regex-syntax v0.6.17 [INFO] [stderr] Compiling percent-encoding v2.1.0 [INFO] [stderr] Compiling shared v0.1.0 (/opt/rustwide/workdir/libs/platform_layer/libs/wimp/shared) [INFO] [stderr] Compiling gcc v0.3.55 [INFO] [stderr] Compiling spin_sleep v0.3.7 [INFO] [stderr] Compiling paths v0.1.0 (/opt/rustwide/workdir/libs/editor/libs/paths) [INFO] [stderr] Compiling libloading v0.5.2 [INFO] [stderr] Compiling thread_local v1.0.1 [INFO] [stderr] Compiling tree-sitter v0.16.1 [INFO] [stderr] Compiling parsers v0.1.0 (/opt/rustwide/workdir/libs/editor/libs/parsers) [INFO] [stderr] Compiling linebreak v0.1.0 (/opt/rustwide/workdir/libs/platform_layer/libs/wimp/gl_layer/libs/text_rendering/libs/linebreak) [INFO] [stderr] Compiling pos_f32 v0.1.0 (/opt/rustwide/workdir/libs/platform_types/libs/pos_f32) [INFO] [stderr] Compiling move_mod v0.1.0 (/opt/rustwide/workdir/libs/platform_types/libs/move_mod) [INFO] [stderr] Compiling text_pos v0.1.0 (/opt/rustwide/workdir/libs/text_pos) [INFO] [stderr] Compiling fast_hash v0.1.0 (/opt/rustwide/workdir/libs/fast_hash) [INFO] [stderr] Compiling walkdir v2.3.1 [INFO] [stderr] Compiling vec1 v0.1.0 (/opt/rustwide/workdir/libs/vec1) [INFO] [stderr] Compiling perf_viz v0.1.0 (/opt/rustwide/workdir/libs/perf_viz) [INFO] [stderr] Compiling net2 v0.2.34 [INFO] [stderr] Compiling xcb v0.8.2 [INFO] [stderr] Compiling parking_lot_core v0.7.2 [INFO] [stderr] Compiling memmap v0.7.0 [INFO] [stderr] Compiling shared_library v0.1.9 [INFO] [stderr] Compiling raw-window-handle v0.3.3 [INFO] [stderr] Compiling dirs-sys v0.3.4 [INFO] [stderr] Compiling non_neg_f32 v0.1.0 (/opt/rustwide/workdir/libs/platform_types/libs/non_neg_f32) [INFO] [stderr] Compiling stb_truetype v0.3.1 [INFO] [stderr] Compiling nix v0.14.1 [INFO] [stderr] Compiling num-traits v0.2.11 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Compiling memoffset v0.5.4 [INFO] [stderr] Compiling crossbeam-epoch v0.8.2 [INFO] [stderr] Compiling if_changed v0.1.0 (/opt/rustwide/workdir/libs/if_changed) [INFO] [stderr] Compiling abs v0.1.0 (/opt/rustwide/workdir/libs/abs) [INFO] [stderr] Compiling gl_generator v0.13.1 [INFO] [stderr] Compiling gl_generator v0.14.0 [INFO] [stderr] Compiling osmesa-sys v0.1.2 [INFO] [stderr] Compiling ropey v1.1.0 [INFO] [stderr] Compiling mio v0.6.22 [INFO] [stderr] Compiling parking_lot v0.10.2 [INFO] [stderr] Compiling directories v2.0.2 [INFO] [stderr] Compiling x11-dl v2.18.5 [INFO] [stderr] Compiling pos_f32_trunc v0.1.0 (/opt/rustwide/workdir/libs/platform_types/libs/pos_f32_trunc) [INFO] [stderr] Compiling f32_0_1 v0.1.0 (/opt/rustwide/workdir/libs/platform_types/libs/f32_0_1) [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling aho-corasick v0.7.10 [INFO] [stderr] Compiling screen_space v0.1.0 (/opt/rustwide/workdir/libs/screen_space) [INFO] [stderr] Compiling nfd v0.0.4 [INFO] [stderr] Compiling quote v1.0.6 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] error: failed to run custom build command for `xcb v0.8.2` [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `/opt/rustwide/target/debug/build/xcb-f416b84c74672ab2/build-script-build` (exit status: 101) [INFO] [stderr] --- stderr [INFO] [stderr] error occured in handler: ('event: ', ('xcb', 'Sync', 'AlarmNotify')) [INFO] [stderr] Traceback (most recent call last): [INFO] [stderr] File "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/rs_client.py", line 2448, in [INFO] [stderr] module.generate() [INFO] [stderr] File "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/xcbgen/state.py", line 108, in generate [INFO] [stderr] self.close() [INFO] [stderr] File "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/rs_client.py", line 296, in rs_close [INFO] [stderr] _f.writeout(os.path.join(module.rs_srcdir, "ffi", "%s.rs" % _module_name(_ns.ext_name))) [INFO] [stderr] File "/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/rs_client.py", line 114, in writeout [INFO] [stderr] with open(path, 'w') as f: [INFO] [stderr] OSError: [Errno 30] Read-only file system: '/opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/src/ffi/sync.rs' [INFO] [stderr] thread 'main' panicked at 'processing of /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/xml/sync.xml returned non-zero (1)', /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:75:17 [INFO] [stderr] stack backtrace: [INFO] [stderr] 0: 0x55bded7a8b0c - std::backtrace_rs::backtrace::libunwind::trace::h793e05efd273d0f4 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5 [INFO] [stderr] 1: 0x55bded7a8b0c - std::backtrace_rs::backtrace::trace_unsynchronized::h640b7b86ff610c77 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 [INFO] [stderr] 2: 0x55bded7a8b0c - std::sys_common::backtrace::_print_fmt::h362fa2a4f354f877 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/sys_common/backtrace.rs:67:5 [INFO] [stderr] 3: 0x55bded7a8b0c - ::fmt::hf439e5ed84c74abd [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/sys_common/backtrace.rs:46:22 [INFO] [stderr] 4: 0x55bded7c645c - core::fmt::write::h72801a82c94e6ff1 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/core/src/fmt/mod.rs:1149:17 [INFO] [stderr] 5: 0x55bded7a5cd5 - std::io::Write::write_fmt::h5562a8b6da0f0339 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/io/mod.rs:1697:15 [INFO] [stderr] 6: 0x55bded7aa250 - std::sys_common::backtrace::_print::hb29ddd998d02631c [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/sys_common/backtrace.rs:49:5 [INFO] [stderr] 7: 0x55bded7aa250 - std::sys_common::backtrace::print::h81965e3d7c90fbb6 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/sys_common/backtrace.rs:36:9 [INFO] [stderr] 8: 0x55bded7aa250 - std::panicking::default_hook::{{closure}}::h84db205ab6674b38 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:211:50 [INFO] [stderr] 9: 0x55bded7a9dfb - std::panicking::default_hook::h1bf8bb4159936bca [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:228:9 [INFO] [stderr] 10: 0x55bded7aa904 - std::panicking::rust_panic_with_hook::hf8e86850fbbd03b1 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:606:17 [INFO] [stderr] 11: 0x55bded7aa3e0 - std::panicking::begin_panic_handler::{{closure}}::h590a0d6060ff866e [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:502:13 [INFO] [stderr] 12: 0x55bded7a8fc4 - std::sys_common::backtrace::__rust_end_short_backtrace::h260b8bd1c848a03c [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/sys_common/backtrace.rs:139:18 [INFO] [stderr] 13: 0x55bded7aa349 - rust_begin_unwind [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:498:5 [INFO] [stderr] 14: 0x55bded7850c1 - core::panicking::panic_fmt::h7b8580d81fcbbacd [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/core/src/panicking.rs:106:14 [INFO] [stderr] 15: 0x55bded7884cf - build_script_build::main::{{closure}}::hd4dbd22eb5415acf [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:75:17 [INFO] [stderr] 16: 0x55bded7871bb - build_script_build::visit_xml::heef8cb418ce9f020 [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:20:44 [INFO] [stderr] 17: 0x55bded7878e3 - build_script_build::main::h92ff625a09fa3009 [INFO] [stderr] at /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/xcb-0.8.2/build.rs:56:5 [INFO] [stderr] 18: 0x55bded78dbbb - core::ops::function::FnOnce::call_once::h8cf5096f465bba11 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/core/src/ops/function.rs:227:5 [INFO] [stderr] 19: 0x55bded788d3e - std::sys_common::backtrace::__rust_begin_short_backtrace::hd3d09fa2d8237256 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/sys_common/backtrace.rs:123:18 [INFO] [stderr] 20: 0x55bded78d101 - std::rt::lang_start::{{closure}}::h47e59bb29a0c79a4 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/rt.rs:145:18 [INFO] [stderr] 21: 0x55bded7a8351 - core::ops::function::impls:: for &F>::call_once::h42d3791e66d196c0 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/core/src/ops/function.rs:259:13 [INFO] [stderr] 22: 0x55bded7a8351 - std::panicking::try::do_call::hc3bcb188e535517f [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:406:40 [INFO] [stderr] 23: 0x55bded7a8351 - std::panicking::try::hb1edf04d4a7097ab [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:370:19 [INFO] [stderr] 24: 0x55bded7a8351 - std::panic::catch_unwind::h75ed941ac0d36d57 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panic.rs:133:14 [INFO] [stderr] 25: 0x55bded7a8351 - std::rt::lang_start_internal::{{closure}}::hc702b3389af4cbea [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/rt.rs:128:48 [INFO] [stderr] 26: 0x55bded7a8351 - std::panicking::try::do_call::h53276a03c7fe2ebc [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:406:40 [INFO] [stderr] 27: 0x55bded7a8351 - std::panicking::try::ha9e37f45dc542517 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panicking.rs:370:19 [INFO] [stderr] 28: 0x55bded7a8351 - std::panic::catch_unwind::h182647595766fee7 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/panic.rs:133:14 [INFO] [stderr] 29: 0x55bded7a8351 - std::rt::lang_start_internal::h571831ebdba142de [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/rt.rs:128:20 [INFO] [stderr] 30: 0x55bded78d0d0 - std::rt::lang_start::h4718518ed3fe5531 [INFO] [stderr] at /rustc/8262275854dc0e5381c9d42d56257d94932c5a87/library/std/src/rt.rs:144:17 [INFO] [stderr] 31: 0x55bded78851c - main [INFO] [stderr] 32: 0x7fead4d3d0b3 - __libc_start_main [INFO] [stderr] 33: 0x55bded7857de - _start [INFO] [stderr] 34: 0x0 - [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "5a8b323404f43f47fa70fcfcd110f7fe684ee9482db8f79aa9311c0e41c1b216", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5a8b323404f43f47fa70fcfcd110f7fe684ee9482db8f79aa9311c0e41c1b216", kill_on_drop: false }` [INFO] [stdout] 5a8b323404f43f47fa70fcfcd110f7fe684ee9482db8f79aa9311c0e41c1b216