Intermittent "error: Could not compile `script`." on buildbot with no other error message

[SimonSapin]

This is the second time I see this recently:

http://build.servo.org/builders/mac-rel-wpt3/builds/2119/steps/compile/logs/stdio
#18585 (comment)

2017-10-10 09:51:36.353 cargo[79545:506502954] Metadata.framework [Error]: couldn't get the client port
    Updating registry `https://github.com/rust-lang/crates.io-index`
    Updating git repository `https://github.com/servo/webrender`
    Updating git repository `https://github.com/servo/osmesa-src`
    Updating git repository `https://github.com/servo/rust-azure`
    Updating git repository `https://github.com/servo/angle`
    Updating git repository `https://github.com/servo/devices`
 Downloading euclid v0.15.3
 Downloading offscreen_gl_context v0.11.2
 Downloading serde v1.0.14
 Downloading cssparser v0.22.0
 Downloading core-foundation v0.4.4
 Downloading core-foundation-sys v0.4.4
 Downloading serde_derive v1.0.14
 Downloading serde_derive_internals v0.16.0
 Downloading app_units v0.5.6
 Downloading precomputed-hash v0.1.1
 Downloading smallbitvec v1.0.6
 Downloading parking_lot v0.4.8
 Downloading html5ever v0.20.0
 Downloading rayon v0.8.2
 Downloading parking_lot_core v0.2.6
 Downloading markup5ever v0.5.0
 Downloading hyper v0.10.13
 Downloading image v0.16.0
 Downloading png v0.10.0
 Downloading inflate v0.3.3
 Downloading rust-webvr-api v0.9.2
 Downloading harfbuzz-sys v0.1.14
 Downloading rust-webvr v0.9.4
 Downloading mitochondria v1.1.2
 Downloading xml5ever v0.10.0
 Downloading audio-video-metadata v0.1.4
 Downloading mp3-metadata v0.3.0
 Downloading parse-hosts v0.5.0
 Downloading multistr v0.5.2
 Downloading push-trait v0.6.0
 Downloading servo-skia v0.30000006.2
 Downloading expat-sys v2.1.5
 Downloading servo-glutin v0.12.1
 Downloading core-graphics v0.9.1
 Downloading core-text v7.0.0
 Downloading io-surface v0.8.0
 Downloading blurmac v0.0.1
 Downloading cocoa v0.10.0
   Compiling color_quant v1.0.0
   Compiling webrender v0.52.0 (https://github.com/servo/webrender#faa9cfe1)
   Compiling unicode-segmentation v1.2.0
   Compiling rustc-serialize v0.3.24
   Compiling void v1.0.2
   Compiling getopts v0.2.14
   Compiling signpost v0.1.0 (https://github.com/pcwalton/signpost.git#7ed71250)
   Compiling foreign-types v0.2.0
   Compiling block v0.1.6
   Compiling typeable v0.1.2
   Compiling xi-unicode v0.1.0
   Compiling mozjs_sys v0.0.0 (https://github.com/servo/mozjs#834ce35c)
   Compiling quote v0.3.15
   Compiling encoding_index_tests v0.1.4
   Compiling core-foundation-sys v0.4.4
   Compiling dom_struct v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/dom_struct)
   Compiling string_cache_shared v0.3.0
   Compiling scopeguard v0.3.2
   Compiling antidote v1.0.0
   Compiling mitochondria v1.1.2
   Compiling simd v0.2.0
   Compiling rayon-core v1.2.0
   Compiling ref_slice v1.1.1
   Compiling siphasher v0.2.2
   Compiling fnv v1.0.5
   Compiling lazycell v0.4.0
   Compiling thread_profiler v0.1.3
   Compiling browserhtml v0.1.17 (https://github.com/browserhtml/browserhtml?branch=crate#7c66ae9a)
   Compiling ref_filter_map v1.0.1
   Compiling osmesa-src v17.2.0-devel (https://github.com/servo/osmesa-src#20646425)
   Compiling itoa v0.3.1
   Compiling matches v0.1.4
   Compiling unicode-normalization v0.1.4
   Compiling bitreader v0.3.0
   Compiling traitobject v0.1.0
   Compiling ident_case v1.0.0
   Compiling procedural-masquerade v0.1.2
   Compiling regex-syntax v0.4.1
   Compiling bitflags v0.8.2
   Compiling stable_deref_trait v1.0.0
   Compiling lazy_static v0.2.8
   Compiling utf8-ranges v1.0.0
   Compiling same-file v0.1.3
   Compiling libloading v0.4.0
   Compiling futures v0.1.13
   Compiling rustc-demangle v0.1.4
   Compiling odds v0.2.25
   Compiling atomic_refcell v0.1.0
   Compiling bytes v0.3.0
   Compiling dtoa v0.4.1
   Compiling either v1.1.0
   Compiling pkg-config v0.3.9
   Compiling alloc-no-stdlib v1.2.0
   Compiling threadpool v1.3.2
   Compiling mp3-metadata v0.3.0
   Compiling safemem v0.2.0
   Compiling cfg-if v0.1.2
   Compiling script_plugins v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/script_plugins)
   Compiling servo v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/ports/servo)
   Compiling semver v0.1.20
   Compiling extra-default v0.2.0
   Compiling smallbitvec v1.0.6
   Compiling heapsize v0.4.0
   Compiling scoped_threadpool v0.1.7
   Compiling bitflags v0.9.1
   Compiling libc v0.2.23
   Compiling half v1.0.0
   Compiling openssl v0.9.12
   Compiling num-traits v0.1.37
   Compiling lzw v0.10.0
   Compiling mac v0.1.1
   Compiling percent-encoding v1.0.0
   Compiling gcc v0.3.47
   Compiling pdqsort v0.1.2
   Compiling unicode-xid v0.0.4
   Compiling slab v0.3.0
   Compiling binary-space-partition v0.1.2
   Compiling khronos_api v1.0.1
   Compiling adler32 v1.0.0
   Compiling open v1.2.0
   Compiling language-tags v0.2.2
   Compiling log v0.3.8
   Compiling sha1 v0.2.0
   Compiling leak v0.1.2
   Compiling precomputed-hash v0.1.1
   Compiling sig v0.1.1
   Compiling bitflags v0.5.0
   Compiling httparse v1.2.1
   Compiling byteorder v1.0.0
   Compiling bitflags v0.7.0
   Compiling unreachable v0.1.1
   Compiling encoding-index-korean v1.20141219.5
   Compiling encoding-index-tradchinese v1.20141219.5
   Compiling encoding-index-japanese v1.20141219.5
   Compiling encoding-index-singlebyte v1.20141219.5
   Compiling encoding-index-simpchinese v1.20141219.5
   Compiling blurmock v0.1.2
   Compiling utf-8 v0.7.1
   Compiling owning_ref v0.3.3
   Compiling walkdir v1.0.7
   Compiling nodrop v0.1.8
   Compiling dtoa-short v0.3.0
   Compiling itertools v0.5.10
   Compiling coco v0.1.1
   Compiling brotli-decompressor v1.0.9
   Compiling bow v1.0.2
   Compiling len-trait v0.6.1
   Compiling rustc_version v0.1.7
   Compiling shared_library v0.1.5
   Compiling malloc_buf v0.0.6
   Compiling memchr v1.0.1
   Compiling time v0.1.37
   Compiling rand v0.3.15
   Compiling iovec v0.1.0
   Compiling thread-id v3.1.0
   Compiling net2 v0.2.29
   Compiling backtrace v0.3.2
   Compiling num_cpus v1.4.0
   Compiling gif v0.9.1
   Compiling enum_primitive v0.1.1
   Compiling num-integer v0.1.34
   Compiling synom v0.11.3
   Compiling inflate v0.3.3
   Compiling leaky-cow v0.1.1
   Compiling gamma-lut v0.2.0
   Compiling mime v0.2.4
   Compiling servo_remutex v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/remutex)
   Compiling pulldown-cmark v0.0.8
   Compiling ogg v0.5.0
   Compiling base64 v0.6.0
   Compiling deflate v0.7.5
   Compiling fxhash v0.2.1
   Compiling mp4parse v0.7.1
   Compiling xml-rs v0.3.6
   Compiling ordered-float v0.4.0
   Compiling debug_unreachable v0.1.1
   Compiling openssl-sys v0.9.12
   Compiling miniz-sys v0.1.9
   Compiling task_info v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/support/rust-task_info)
   Compiling tinyfiledialogs v2.5.9
   Compiling cmake v0.1.22
   Compiling libz-sys v1.0.16
   Compiling encoding v0.2.33
   Compiling servo_arc v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/servo_arc)
   Compiling arrayvec v0.3.23
   Compiling style v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/style)
   Compiling push-trait v0.6.0
   Compiling unicase v1.4.0
   Compiling osmesa-sys v0.1.2
   Compiling objc v0.2.2
   Compiling aho-corasick v0.6.3
   Compiling brotli v1.0.8
   Compiling thread_local v0.3.3
   Compiling cookie v0.6.2
   Compiling mio v0.6.9
   Compiling gaol v0.0.1 (https://github.com/servo/gaol#227ff0ba)
   Compiling tempdir v0.3.5
   Compiling servo_rand v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/rand)
   Compiling num-iter v0.1.33
   Compiling num-rational v0.1.36
   Compiling syn v0.11.11
   Compiling ogg_metadata v0.4.1
   Compiling futf v0.1.3
   Compiling gl_generator v0.5.3
   Compiling azure v0.21.2 (https://github.com/servo/rust-azure#6bcf4f56)
   Compiling expat-sys v2.1.5
   Compiling servo-skia v0.30000006.2
   Compiling angle v0.5.0 (https://github.com/servo/angle?branch=servo#1599c1d0)
   Compiling js v0.1.6 (https://github.com/servo/rust-mozjs#3de4ff3d)
   Compiling heartbeats-simple-sys v0.4.1
   Compiling harfbuzz-sys v0.1.14
   Compiling fontsan v0.3.2 (https://github.com/servo/fontsan#ab68da17)
   Compiling core-foundation v0.4.4
   Compiling immeta v0.3.5
   Compiling lru_cache v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/lru_cache)
   Compiling multistr v0.5.2
   Compiling hashglobe v0.1.0 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/hashglobe)
   Compiling smallvec v0.4.3
   Compiling blurmac v0.0.1
   Compiling objc_id v0.1.0
   Compiling regex v0.2.2
   Compiling skeptic v0.9.0
   Compiling png v0.10.0
   Compiling rayon v0.8.2
   Compiling audio-video-metadata v0.1.4
   Compiling tendril v0.4.0
   Compiling rust-webvr v0.9.4
   Compiling gleam v0.4.8
   Compiling offscreen_gl_context v0.11.2
   Compiling servo-glutin v0.12.1
   Compiling core-graphics v0.9.1
   Compiling parse-hosts v0.5.0
   Compiling fallible v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/fallible)
   Compiling parking_lot_core v0.2.6
   Compiling objc-foundation v0.1.1
   Compiling device v0.0.1 (https://github.com/servo/devices#c3b012b0)
   Compiling swapper v0.0.4
   Compiling jpeg-decoder v0.1.13
   Compiling serde_derive_internals v0.16.0
   Compiling html5ever v0.20.0
   Compiling synstructure v0.5.2
   Compiling domobject_derive v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/domobject_derive)
   Compiling cssparser v0.22.0
   Compiling darling_core v0.2.0
   Compiling flate2 v0.2.19
   Compiling env_logger v0.4.3
   Compiling caseless v0.1.3
   Compiling cocoa v0.10.0
   Compiling core-text v7.0.0
   Compiling phf_shared v0.7.21
   Compiling parking_lot v0.4.8
   Compiling clipboard v0.4.0
   Compiling image v0.16.0
   Compiling heapsize_derive v0.1.4
   Compiling deny_public_fields v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/deny_public_fields)
   Compiling jstraceable_derive v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/jstraceable_derive)
   Compiling malloc_size_of_derive v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/malloc_size_of_derive)
   Compiling serde_derive v1.0.14
   Compiling darling_macro v0.2.0
   Compiling heartbeats-simple v0.4.0
   Compiling phf_generator v0.7.21
   Compiling phf v0.7.21
   Compiling unicode-script v0.1.1
   Compiling darling v0.2.0
   Compiling cgl v0.2.1
   Compiling string_cache_codegen v0.4.0
   Compiling phf_codegen v0.7.21
   Compiling style_derive v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/style_derive)
   Compiling io-surface v0.8.0
   Compiling servo_atoms v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/atoms)
   Compiling string_cache v0.6.2
   Compiling cssparser-macros v0.3.0
   Compiling mime_guess v1.8.1
   Compiling selectors v0.19.0 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/selectors)
   Compiling markup5ever v0.5.0
   Compiling serde v1.0.14
   Compiling rust-webvr-api v0.9.2
   Compiling uuid v0.5.0
   Compiling euclid v0.15.3
   Compiling serde_json v1.0.2
   Compiling range v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/range)
   Compiling serde_bytes v0.10.0
   Compiling unicode-bidi v0.3.3
   Compiling app_units v0.5.6
   Compiling bincode v0.8.0
   Compiling plane-split v0.6.0
   Compiling gfx_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/gfx_traits)
   Compiling servo_geometry v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/geometry)
   Compiling ipc-channel v0.8.0
   Compiling idna v0.1.2
   Compiling malloc_size_of v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/malloc_size_of)
   Compiling script v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/script)
   Compiling xml5ever v0.10.0
   Compiling url v1.5.1
   Compiling webrender_api v0.52.0 (https://github.com/servo/webrender#faa9cfe1)
   Compiling ws v0.6.0
   Compiling hyper v0.10.13
   Compiling url_serde v0.2.0
   Compiling debugger v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/debugger)
   Compiling servo_url v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/url)
   Compiling msg v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/msg)
   Compiling style_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/style_traits)
   Compiling servo_config v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/config)
   Compiling webvr_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/webvr_traits)
   Compiling webdriver v0.22.0
   Compiling servo-websocket v0.19.1
   Compiling hyper_serde v0.7.0
   Compiling hyper-openssl v0.2.6
   Compiling influent v0.4.0
   Compiling bluetooth_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/bluetooth_traits)
   Compiling profile_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/profile_traits)
   Compiling canvas_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/canvas_traits)
   Compiling net_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/net_traits)
   Compiling devtools_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/devtools_traits)
   Compiling bluetooth v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/bluetooth)
   Compiling profile v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/profile)
   Compiling devtools v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/devtools)
   Compiling net v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/net)
   Compiling script_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/script_traits)
   Compiling webvr v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/webvr)
   Compiling webdriver_server v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/webdriver_server)
   Compiling compositing v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/compositing)
   Compiling canvas v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/canvas)
   Compiling gfx v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/gfx)
   Compiling metrics v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/metrics)
   Compiling layout_traits v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/layout_traits)
   Compiling script_layout_interface v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/script_layout_interface)
   Compiling constellation v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/constellation)
   Compiling layout v0.0.1 (file:///Users/servo/buildbot/slave/mac-rel-wpt3/build/components/layout)
error: Could not compile `script`.

To learn more, run the command again with --verbose.
[Warning] Could not generate notification! Optional Python module 'pyobjc' is not installed.
Looking for rustc at /Users/servo/.servo/rust/2017-10-05-alt/rustc-nightly-x86_64-apple-darwin/rustc/bin/rustc
Downloading Rust compiler...
Extracting Rust compiler...
Rust compiler ready.
Downloading Host rust library for target x86_64-apple-darwin...
Extracting Rust stdlib for target x86_64-apple-darwin...
Rust x86_64-apple-darwin libs ready.
Downloading Cargo nightly...
Extracting Cargo nightly...
Cargo ready.
Build FAILED in 0:51:23

[SimonSapin]

I believe this message if from Cargo. This means rustc existed suddenly with a non-zero exit code but without writing anything itself on stderr or stdout.

[jdm]

I suspect an OOM before linking starts, but I'm not really sure how to confirm that.

[highfive]

cc @aneeshusa

[jdm]

I logged into servo-mac6 and looked at top; this certainly looks suspicious:

PhysMem: 4078M used (1274M wired), 16M unused.

[jdm]

Same error for the android builder now on servo-linux-cross1: http://build.servo.org/builders/android/builds/9285/steps/compile/logs/stdio

[SimonSapin]

We’ve moved from Buildbot to Taskcluster.