[INFO] crate harfbuzz_rs 1.0.0 is already in cache
[INFO] extracting crate harfbuzz_rs 1.0.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/harfbuzz_rs/1.0.0
[INFO] extracting crate harfbuzz_rs 1.0.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/harfbuzz_rs/1.0.0
[INFO] validating manifest of harfbuzz_rs-1.0.0 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 harfbuzz_rs-1.0.0 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 harfbuzz_rs-1.0.0
[INFO] finished frobbing harfbuzz_rs-1.0.0
[INFO] frobbed toml for harfbuzz_rs-1.0.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/harfbuzz_rs/1.0.0/Cargo.toml
[INFO] started frobbing harfbuzz_rs-1.0.0
[INFO] finished frobbing harfbuzz_rs-1.0.0
[INFO] frobbed toml for harfbuzz_rs-1.0.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/harfbuzz_rs/1.0.0/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 harfbuzz_rs-1.0.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/harfbuzz_rs/1.0.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 657f5d6ad4fa4819441fce81cfb29ad7d4d9fa9864c38b50a5dea62f4b2d407e
[INFO] running `"docker" "start" "-a" "657f5d6ad4fa4819441fce81cfb29ad7d4d9fa9864c38b50a5dea62f4b2d407e"`
[INFO] [stderr]    Compiling servo-freetype-sys v4.0.5
[INFO] [stderr]    Compiling harfbuzz-sys v0.3.2
[INFO] [stderr]    Compiling freetype v0.4.1
[INFO] [stderr]    Compiling harfbuzz_rs v1.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.30s
[INFO] running `"docker" "inspect" "657f5d6ad4fa4819441fce81cfb29ad7d4d9fa9864c38b50a5dea62f4b2d407e"`
[INFO] running `"docker" "rm" "-f" "657f5d6ad4fa4819441fce81cfb29ad7d4d9fa9864c38b50a5dea62f4b2d407e"`
[INFO] [stdout] 657f5d6ad4fa4819441fce81cfb29ad7d4d9fa9864c38b50a5dea62f4b2d407e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/harfbuzz_rs/1.0.0:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2d53ed46c2a0870b2a5a5890f1c6c79a92299e62c7eeff6b1b5ab51e520a4d62
[INFO] running `"docker" "start" "-a" "2d53ed46c2a0870b2a5a5890f1c6c79a92299e62c7eeff6b1b5ab51e520a4d62"`
[INFO] [stderr]    Compiling harfbuzz_rs v1.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `"docker" "inspect" "2d53ed46c2a0870b2a5a5890f1c6c79a92299e62c7eeff6b1b5ab51e520a4d62"`
[INFO] running `"docker" "rm" "-f" "2d53ed46c2a0870b2a5a5890f1c6c79a92299e62c7eeff6b1b5ab51e520a4d62"`
[INFO] [stdout] 2d53ed46c2a0870b2a5a5890f1c6c79a92299e62c7eeff6b1b5ab51e520a4d62
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/harfbuzz_rs/1.0.0:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 5df06bbafe56b1144f69d6436db8986840494e71fd82479ce71cba11b9fdea85
[INFO] running `"docker" "start" "-a" "5df06bbafe56b1144f69d6436db8986840494e71fd82479ce71cba11b9fdea85"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/harfbuzz_rs-1d72f0a777308fb8
[INFO] [stdout] 
[INFO] [stdout] running 15 tests
[INFO] [stdout] test blob::tests::test_arc_to_blob_conversion ... ok
[INFO] [stdout] test buffer::tests::test_str_item_heap ... ok
[INFO] [stdout] test buffer::tests::test_memory_layouts ... ok
[INFO] [stdout] test blob::tests::test_vec_to_blob_conversion ... ok
[INFO] [stdout] test common::tests::test_tag_creation ... ok
[INFO] [stdout] test common::tests::test_language ... ok
[INFO] [stdout] test common::tests::reference_counting_shared ... ok
[INFO] [stdout] test common::tests::test_tag_debugging ... ok
[INFO] [stdout] test face::tests::test_face_from_table_func ... ok
[INFO] [stdout] test tests::feature_new ... ok
[INFO] [stdout] test font::test::test_font_extents_layout ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test buffer::tests::test_str_item_different_allocations ... ok
[INFO] [stdout] test buffer::tests::test_str_item_not_substring ... ok
[INFO] [stdout] test buffer::tests::test_str_item_not_substring2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests harfbuzz_rs
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test src/common.rs - common::Tag::from_str (line 102) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::UnicodeBuffer::clear_contents (line 594) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::UnicodeBuffer::codepoints (line 513) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::UnicodeBuffer::new (line 408) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::UnicodeBuffer::add_str (line 456) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::UnicodeBuffer::len (line 429) ... ok
[INFO] [stdout] test src/font_funcs.rs - font_funcs::FontFuncsImpl (line 315) ... ignored
[INFO] [stdout] test src/font_funcs.rs - font_funcs::FontFuncsImpl (line 329) ... ignored
[INFO] [stdout] test src/font_funcs.rs - font_funcs::FontFuncsImpl<T>::from_trait_impl (line 369) ... ignored
[INFO] [stdout] test src/buffer.rs - buffer::UnicodeBuffer::add_str_item (line 490) ... ok
[INFO] [stdout] test src/buffer.rs - buffer::GlyphBuffer::serializer (line 711) ... FAILED
[INFO] [stdout] test src/common.rs - common::Tag::new (line 23) ... ok
[INFO] [stdout] test src/common.rs - common::Tag::to_bytes (line 42) ... ok
[INFO] [stdout] test src/font.rs - font::Font (line 84) ... ok
[INFO] [stdout] test src/font.rs - font::Font::parent (line 176) ... ok
[INFO] [stdout] test src/font.rs - font::Font::create_sub_font (line 148) ... ok
[INFO] [stdout] test src/lib.rs -  (line 15) ... ok
[INFO] [stdout] test src/lib.rs - Feature (line 112) ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/buffer.rs - buffer::GlyphBuffer::serializer (line 711) stdout ----
[INFO] [stdout] Test executable failed (exit code 101).
[INFO] [stdout] 
[INFO] [stdout] stderr:
[INFO] [stdout] thread 'main' panicked at 'assertion failed: `(left == right)`
[INFO] [stdout]   left: `"gid2=0+584|gid3=1+612|gid4=2+586"`,
[INFO] [stdout]  right: `"gid2=0+520|gid3=1+574|gid4=2+562"`', src/buffer.rs:25:1
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x5652d3f9cf6b - backtrace::backtrace::libunwind::trace::h23ae608c8b906c69
[INFO] [stdout]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
[INFO] [stdout]    1:     0x5652d3f9cf6b - backtrace::backtrace::trace_unsynchronized::h65b3ea295a85fd48
[INFO] [stdout]                                at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
[INFO] [stdout]    2:     0x5652d3f9cf6b - std::sys_common::backtrace::_print::h24f527b44b6cfc06
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:47
[INFO] [stdout]    3:     0x5652d3f9cf6b - std::sys_common::backtrace::print::h712608e4347fd64a
[INFO] [stdout]                                at src/libstd/sys_common/backtrace.rs:36
[INFO] [stdout]    4:     0x5652d3f9cf6b - std::panicking::default_hook::{{closure}}::h6c3d570c2b500048
[INFO] [stdout]                                at src/libstd/panicking.rs:200
[INFO] [stdout]    5:     0x5652d3f9cc46 - std::panicking::default_hook::hb29963fb4747e0dd
[INFO] [stdout]                                at src/libstd/panicking.rs:214
[INFO] [stdout]    6:     0x5652d3f9d62d - std::panicking::rust_panic_with_hook::hd1236c3083de823a
[INFO] [stdout]                                at src/libstd/panicking.rs:477
[INFO] [stdout]    7:     0x5652d3f9d1b2 - std::panicking::continue_panic_fmt::he38ad41d6304a12c
[INFO] [stdout]                                at src/libstd/panicking.rs:384
[INFO] [stdout]    8:     0x5652d3f9d0ff - std::panicking::begin_panic_fmt::h4b478f1ed53f4521
[INFO] [stdout]                                at src/libstd/panicking.rs:339
[INFO] [stdout]    9:     0x5652d3f8c22d - rust_out::main::h1cf9155cb6204ee7
[INFO] [stdout]   10:     0x5652d3f8d913 - std::rt::lang_start::{{closure}}::h00a7ffc4b255461a
[INFO] [stdout]   11:     0x5652d3f9d083 - std::rt::lang_start_internal::{{closure}}::hf367a5a6ae52b0ce
[INFO] [stdout]                                at src/libstd/rt.rs:49
[INFO] [stdout]   12:     0x5652d3f9d083 - std::panicking::try::do_call::h9d779bc5e27e3284
[INFO] [stdout]                                at src/libstd/panicking.rs:296
[INFO] [stdout]   13:     0x5652d3f9f13a - __rust_maybe_catch_panic
[INFO] [stdout]                                at src/libpanic_unwind/lib.rs:80
[INFO] [stdout]   14:     0x5652d3f9db3d - std::panicking::try::h4af22d9cb0afa351
[INFO] [stdout]                                at src/libstd/panicking.rs:275
[INFO] [stdout]   15:     0x5652d3f9db3d - std::panic::catch_unwind::hbb68a9ada87bfb97
[INFO] [stdout]                                at src/libstd/panic.rs:394
[INFO] [stdout]   16:     0x5652d3f9db3d - std::rt::lang_start_internal::hba9e09d74440ce4d
[INFO] [stdout]                                at src/libstd/rt.rs:48
[INFO] [stdout]   17:     0x5652d3f8d8f8 - std::rt::lang_start::hb393a69b73b35e9d
[INFO] [stdout]   18:     0x5652d3f8c34b - main
[INFO] [stdout]   19:     0x7ff11bb6c2e1 - __libc_start_main
[INFO] [stdout]   20:     0x5652d3f8bd2a - _start
[INFO] [stdout]   21:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/buffer.rs - buffer::GlyphBuffer::serializer (line 711)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 14 passed; 1 failed; 3 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `"docker" "inspect" "5df06bbafe56b1144f69d6436db8986840494e71fd82479ce71cba11b9fdea85"`
[INFO] running `"docker" "rm" "-f" "5df06bbafe56b1144f69d6436db8986840494e71fd82479ce71cba11b9fdea85"`
[INFO] [stdout] 5df06bbafe56b1144f69d6436db8986840494e71fd82479ce71cba11b9fdea85