Nightly macOS can't initialize GStreamer

[jdm]

godot:MacOS jdm$ ./servo https://hubs.mozilla.com/mB8Wn7L/talkative-simplistic-sphere --pref dom.webrtc.enabled --pref dom.gamepad.enabled --pref dom.webrtc.transceiver.enabled --pref dom.canvas_capture.enabled --pref dom.svg.enabled
A-Frame Version: https://github.com/MozillaReality/aframe
three Version: https://github.com/MozillaReality/three.js
WebVR Polyfill Version: ^0.10.10
%ccore:schema:warn %cDefault value `null` does not match type `string` in component `media-loader`%c  color: orange color: inherit color: orange
%ccore:schema:warn %cDefault value `null` does not match type `string` in component `media-loader`%c  color: orange color: inherit color: orange
%ccore:schema:warn %cDefault value `null` does not match type `string` in component `media-loader`%c  color: orange color: inherit color: orange
%ccore:schema:warn %cDefault value `undefined` does not match type `string` in component `media-image`%c  color: orange color: inherit color: orange
%ccore:schema:warn %cDefault value `null` does not match type `string` in component `camera-focus-button`%c  color: orange color: inherit color: orange
%ccore:schema:warn %cDefault value `null` does not match type `string` in component `emit-scene-event-on-remove`%c  color: orange color: inherit color: orange

(<unknown>:48101): GStreamer-WARNING **: 10:22:56.602: Failed to load plugin '/usr/local/lib/gstreamer-1.0/libgstosxaudio.so': dlopen(/usr/local/lib/gstreamer-1.0/libgstosxaudio.so, 2): Library not loaded: /usr/local/opt/gst-plugins-base/lib/libgstaudio-1.0.0.dylib
  Referenced from: /usr/local/lib/gstreamer-1.0/libgstosxaudio.so
  Reason: Incompatible library version: libgstosxaudio.so requires version 1603.0.0 or later, but libgstaudio-1.0.0.dylib provides version 1602.0.0

(<unknown>:48101): GStreamer-WARNING **: 10:22:56.603: Failed to load plugin '/usr/local/lib/gstreamer-1.0/libgstosxaudio.so': dlopen(/usr/local/lib/gstreamer-1.0/libgstosxaudio.so, 2): Library not loaded: /usr/local/opt/gst-plugins-base/lib/libgstaudio-1.0.0.dylib
  Referenced from: /usr/local/lib/gstreamer-1.0/libgstosxaudio.so
  Reason: Incompatible library version: libgstosxaudio.so requires version 1603.0.0 or later, but libgstaudio-1.0.0.dylib provides version 1602.0.0

(<unknown>:48101): GStreamer-WARNING **: 10:22:56.608: Failed to load plugin '/usr/local/lib/gstreamer-1.0/libgstapplemedia.so': dlopen(/usr/local/lib/gstreamer-1.0/libgstapplemedia.so, 2): Library not loaded: /usr/local/opt/gst-plugins-base/lib/libgstaudio-1.0.0.dylib
  Referenced from: /usr/local/lib/gstreamer-1.0/libgstapplemedia.so
  Reason: Incompatible library version: libgstapplemedia.so requires version 1603.0.0 or later, but libgstaudio-1.0.0.dylib provides version 1602.0.0
%ccore:schema:warn %cDefault value `[object Object]` does not match type `string` in component `pen`%c  color: orange color: inherit color: orange
%ccore:schema:warn %cDefault value `[object Object]` does not match type `string` in component `pen-laser`%c  color: orange color: inherit color: orange
%ccore:schema:warn %cDefault value `[object Object]` does not match type `string` in component `pen-laser`%c  color: orange color: inherit color: orange
%ccore:schema:warn %cDefault value `[object Object]` does not match type `string` in component `pen-laser`%c  color: orange color: inherit color: orange
App version: 1.0.0.20200716002524
Tracking: Sentry DSN: https://013d6a364fed43cdb0539a61d520597a@sentry.prod.mozaws.net/370
Tracking: Google Analytics ID: UA-77033033-12
No WebGL 2.0 context available. Falling back to WebGL 1.0
THREE.WebGLRenderer: WEBGL_depth_texture extension not supported.
%ccore:schema:warn %cUnknown property `multiview` for component/system `undefined`.%c  color: orange color: inherit color: orange
Using Non-VR bindings.

(<unknown>:48101): GStreamer-WARNING **: 10:22:56.743: Failed to load plugin '/usr/local/lib/gstreamer-1.0/libgstapp.so': dlopen(/usr/local/lib/gstreamer-1.0/libgstapp.so, 2): Library not loaded: /usr/local/Cellar/gst-plugins-base/1.16.2/lib/libgstapp-1.0.0.dylib
  Referenced from: /usr/local/lib/gstreamer-1.0/libgstapp.so
  Reason: Incompatible library version: libgstapp.so requires version 1603.0.0 or later, but libgstapp-1.0.0.dylib provides version 1602.0.0
Could not start audio render thread: Backend("appsrc creation failed") (thread AudioRenderThread, at /Users/worker/.cargo/git/checkouts/media-c23a3cd5aa97076a/7b0794d/audio/render_thread.rs:165)
[2020-07-16T14:22:56Z ERROR servo] Could not start audio render thread: Backend("appsrc creation failed")
called `Result::unwrap()` on an `Err` value: RecvError (thread ScriptThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }, at /Users/worker/.cargo/git/checkouts/media-c23a3cd5aa97076a/7b0794d/audio/context.rs:192)
[2020-07-16T14:22:56Z ERROR servo] called `Result::unwrap()` on an `Err` value: RecvError
assertion failed: `(left == right)`
  left: `5`,
 right: `1`: This runtime still has live children. (thread ScriptThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }, at /Users/worker/.cargo/git/checkouts/rust-mozjs-8611526964119dd6/0caf554/src/rust.rs:425)
[2020-07-16T14:22:56Z ERROR servo] assertion failed: `(left == right)`
      left: `5`,
     right: `1`: This runtime still has live children.
thread panicked while panicking. aborting.
Stack trace for thread "ScriptThread PipelineId { namespace_id: PipelineNamespaceId(1), index: PipelineIndex(1) }"
   0: <servo::backtrace::Print as core::fmt::Debug>::fmt
   1: core::fmt::write
   2: std::io::Write::write_fmt
   3: servo::backtrace::print
   4: servo::install_crash_handler::handler
   5: __sigtramp
   6: std::panicking::rust_panic_with_hook
   7: _rust_begin_unwind
   8: std::panicking::begin_panic_fmt
   9: <mozjs::rust::Runtime as core::ops::drop::Drop>::drop
  10: core::ptr::drop_in_place
  11: <alloc::rc::Rc<T> as core::ops::drop::Drop>::drop
  12: core::ptr::drop_in_place
  13: std::sys_common::backtrace::__rust_begin_short_backtrace
  14: core::ops::function::FnOnce::call_once{{vtable.shim}}
  15: std::sys::unix::thread::Thread::new::thread_start
  16: __pthread_start

[jdm]

godot:MacOS jdm$ ./servo https://codepen.io/Rumyra/pen/qyMzqN/
[2020-07-16T14:24:45Z ERROR script::dom::bindings::error] Error at https://cdpn.io/Rumyra/fullpage/qyMzqN:365:9 console.clear is not a function

(<unknown>:49287): GStreamer-WARNING **: 10:24:45.550: Failed to load plugin '/usr/local/lib/gstreamer-1.0/libgstplayback.so': dlopen(/usr/local/lib/gstreamer-1.0/libgstplayback.so, 2): Library not loaded: /usr/local/Cellar/gst-plugins-base/1.16.2/lib/libgstpbutils-1.0.0.dylib
  Referenced from: /usr/local/lib/gstreamer-1.0/libgstplayback.so
  Reason: Incompatible library version: libgstplayback.so requires version 1603.0.0 or later, but libgstpbutils-1.0.0.dylib provides version 1602.0.0

** (<unknown>:49287): ERROR **: 10:24:45.550: GstPlayer: 'playbin' element not found, please check your setup
Trace/BPT trap: 5

[jdm]

I believe the issue here is that the gstreamer shared libraries that are bundled in the nightly build come from the build machines which are still on gstreamer 1.16.2, and my local machine has gstreamer 1.16.3.

[jdm]

We probably need to bundle more shared libraries from the build machines to avoid this situation.