dart:zircon bindings are not initialized properly in the Fuchsia runner #68732
Description
Following changes to isolate initialization in the engine, the native bindings for dart:zircon and dart:fuchsia no longer appear to be set up correctly.
The native bindings for dart:fuchsia and dart:zircon are initialized by the callback assigned to settings.root_isolate_create_callback here: https://github.com/flutter/engine/blob/49c35b6177b0dd7ebeda275587dd5a5631c8b688/shell/platform/fuchsia/flutter/engine.cc#L254
Tentatively assigning to @chinmaygarde to inspect the Fuchsia runner startup sequence for agreement with the engine changes.
/cc @chaselatta @arbreng @jason-simmons @dnfield
Marking P0 because this is blocking rolls, and nnbd work.
[00441.580515][klog]../../third_party/dart/runtime/vm/native_entry.cc: 246: error: Failed to resolve native function 'System_ChannelFromFile' in 'System.channelFromFile'
[00441.580536][klog]version=2.11.0-240.0.dev (dev) (Tue Oct 20 16:27:23 2020 -0700) on "fuchsia_x64"
[00441.580543][klog]pid=3, thread=4386333764384, isolate_group=_for_testing.cmx(0xacd29b3c50), isolate=_for_testing.cmx(0xad92896030)
[00441.580548][klog]isolate_instructions=21901351000, vm_instructions=21901349000
[00441.580557][klog] pc 0x000003b1af37c643 fp 0x0000040a5b6aa080 Dart_DumpNativeStackTrace+0x13
[00441.580566][klog] pc 0x000003b1af22b5c1 fp 0x0000040a5b6aa3d0 dart::NativeEntry::BootstrapNativeCallWrapper+0x171
[00441.580564][klog] pc 0x000003b1af22c167 fp 0x0000040a5b6aa350 dart::NativeEntry::LinkNativeCall+0xaf7
[00441.580560][klog] pc 0x000003b1aed3fc70 fp 0x0000040a5b6aa160 dart::Assert::Fail+0x80
[00441.580572][klog] pc 0x0000021901779ec8 fp 0x0000040a5b6aa430 Unknown symbol
[00441.580570][klog] pc 0x000002190134ab83 fp 0x0000040a5b6aa408 Unknown symbol
[00441.580573][klog] pc 0x000002190177ae8a fp 0x0000040a5b6aa458 Unknown symbol
[00441.580575][klog] pc 0x0000021901b7bbd6 fp 0x0000040a5b6aa508 Unknown symbol
[00441.580576][klog] pc 0x0000021901b7e4e6 fp 0x0000040a5b6aa530 Unknown symbol
[00441.580578][klog] pc 0x0000021901b7c648 fp 0x0000040a5b6aa558 Unknown symbol
[00441.580579][klog] pc 0x0000021901b7f44d fp 0x0000040a5b6aa578 Unknown symbol
[00441.580581][klog] pc 0x00000219028a9c34 fp 0x0000040a5b6aa648 Unknown symbol
[00441.580585][klog] pc 0x00000219028bdbcf fp 0x0000040a5b6aa6d0 Unknown symbol
[00441.580583][klog] pc 0x000002190287b26f fp 0x0000040a5b6aa690 Unknown symbol
[00441.580582][klog] pc 0x000002190137dd84 fp 0x0000040a5b6aa660 Unknown symbol
[00441.580587][klog] pc 0x00000219028da5b9 fp 0x0000040a5b6aa708 Unknown symbol
[00441.580586][klog] pc 0x00000219028bdc40 fp 0x0000040a5b6aa6e8 Unknown symbol
[00441.580596][klog] pc 0x00000219013713ff fp 0x0000040a5b6aa968 Unknown symbol
[00441.580593][klog] pc 0x00000219021603ab fp 0x0000040a5b6aa860 Unknown symbol
[00441.580595][klog] pc 0x000002190136c431 fp 0x0000040a5b6aa890 Unknown symbol
[00441.580590][klog] pc 0x000002190136e78d fp 0x0000040a5b6aa7b0 Unknown symbol
[00441.580589][klog] pc 0x00000219028c0c0d fp 0x0000040a5b6aa738 Unknown symbol
[00441.580592][klog] pc 0x000002190136e9dd fp 0x0000040a5b6aa810 Unknown symbol
[00441.580598][klog] pc 0x00000219028c0caf fp 0x0000040a5b6aa9a0 Unknown symbol
[00441.580603][klog] pc 0x00000219013c1e2d fp 0x0000040a5b6aaa20 Unknown symbol
[00441.580602][klog] pc 0x00000219028da5b9 fp 0x0000040a5b6aaa00 Unknown symbol
[00441.580599][klog] pc 0x00000219028da68a fp 0x0000040a5b6aa9b8 Unknown symbol
[00441.580600][klog] pc 0x00000219028be660 fp 0x0000040a5b6aa9e0 Unknown symbol
[00441.580620][klog] pc 0x000003b1aed7826a fp 0x0000040a5b6aaf00 void std::__2::__function::__policy_invoker<void +0x10e
[00441.580616][klog] pc 0x000003b1af35df7e fp 0x0000040a5b6aaea0 Dart_HandleMessage+0x35e
[00441.580605][klog] pc 0x000002190134a92f fp 0x0000040a5b6aaa98 Unknown symbol
[00441.580608][klog] pc 0x000003b1af2020f6 fp 0x0000040a5b6aab40 dart::DartEntry::InvokeFunction+0x206
[00441.580613][klog] pc 0x000003b1af22a64c fp 0x0000040a5b6aade0 dart::MessageHandler::HandleMessages+0x17c
[00441.580611][klog] pc 0x000003b1af21974f fp 0x0000040a5b6aad60 dart::IsolateMessageHandler::HandleMessage+0xf8f
[00441.580669][klog]-- End of DumpStackTrace
[00441.580685][klog][bare-dart : sp(0x40a5b6aa418) fp(0x40a5b6aa430) pc(0x21901779ec8) *dart:zircon_System_channelFromFile ]
[00441.580628][klog] pc 0x000003b1aed76161 fp 0x0000040a5b6aafc0 async_loop_run+0x249
[00441.580674][klog][exit : sp(0) fp(0x40a5b6aa408) pc(0)]
[00441.580650][klog] pc 0x0000421311608266 fp 0x0000040a5b6aafd0 libc.so+0x5e266
[00441.580623][klog] pc 0x000003b1aed52b1c fp 0x0000040a5b6aaf20 async::internal::RetainedTask::Handler+0x24
[00441.580626][klog] pc 0x000003b1aed75782 fp 0x0000040a5b6aaf50 async_loop_dispatch_task+0x32
[00441.580664][klog] pc 0x000042131165043e fp 0x0000040a5b6aaff0 libc.so+0xa643e
[00441.580726][klog][bare-dart : sp(0x40a5b6aa468) fp(0x40a5b6aa508) pc(0x21901b7bbd6) *package:fuchsia_services/src/internal/_startup_context_impl.dart_StartupContextImpl_StartupContextImpl.fromStartupInfo ]
[00441.580697][klog][bare-dart : sp(0x40a5b6aa440) fp(0x40a5b6aa458) pc(0x2190177ae8a) *package:zircon/zircon.dart_Channel_Channel.fromFile ]
[00441.580736][klog][bare-dart : sp(0x40a5b6aa518) fp(0x40a5b6aa530) pc(0x21901b7e4e6) *package:fuchsia_logger/src/internal/_fuchsia_log_writer.dart_FuchsiaLogWriter__connectToSysLogger@6630062345 ]
[00441.580752][klog][bare-dart : sp(0x40a5b6aa568) fp(0x40a5b6aa578) pc(0x21901b7f44d) *package:fuchsia_logger/src/logger/logger.dart_::_setupLogger ]
[00441.580744][klog][bare-dart : sp(0x40a5b6aa540) fp(0x40a5b6aa558) pc(0x21901b7c648) *package:fuchsia_logger/src/logger/logger.dart_::__connectToLogWriterIfNeeded@6629175469 ]
[00441.580782][klog][bare-dart : sp(0x40a5b6aa588) fp(0x40a5b6aa648) pc(0x219028a9c34) *package:....platform.fuchsia.deployment/fuchsia_host.dart_::_start__async_op ]
[00441.580798][klog][bare-dart : sp(0x40a5b6aa658) fp(0x40a5b6aa660) pc(0x2190137dd84) *dart:async__AsyncAwaitCompleter@4048458_start ]
[00441.580807][klog][bare-dart : sp(0x40a5b6aa670) fp(0x40a5b6aa690) pc(0x2190287b26f) *package:....platform.fuchsia.deployment/fuchsia_host.dart_::_start ]
[00441.580820][klog][bare-dart : sp(0x40a5b6aa6a0) fp(0x40a5b6aa6d0) pc(0x219028bdbcf) *package:....platform.fuchsia.deployment.testing/fuchsia_host_with_flutter_driver.dart_::_main ]
[00441.580836][klog][bare-dart : sp(0x40a5b6aa6f8) fp(0x40a5b6aa708) pc(0x219028da5b9) *dart:core__Closure@0150898_dyn_call ]
[00441.580874][klog][bare-dart : sp(0x40a5b6aa820) fp(0x40a5b6aa860) pc(0x219021603ab) *dart:async__CustomZone@4048458_run ]
[00441.580866][klog][bare-dart : sp(0x40a5b6aa7c0) fp(0x40a5b6aa810) pc(0x2190136e9dd) *dart:async_::__rootRun@4048458__rootRun@4048458 ]
[00441.580850][klog][bare-dart : sp(0x40a5b6aa718) fp(0x40a5b6aa738) pc(0x219028c0c0d) *dart:ui_::__runMainZoned@19065589_<anonymous closure>_<anonymous closure> ]
[00441.580858][klog][bare-dart : sp(0x40a5b6aa748) fp(0x40a5b6aa7b0) pc(0x2190136e78d) *dart:async_::__rootRun@4048458 ]
[00441.580828][klog][bare-dart : sp(0x40a5b6aa6e0) fp(0x40a5b6aa6e8) pc(0x219028bdc40) *package:....platform.fuchsia.deployment.testing/fuchsia_host_with_flutter_driver.dart_::_main_main ]
[00441.580881][klog][bare-dart : sp(0x40a5b6aa870) fp(0x40a5b6aa890) pc(0x2190136c431) *dart:async_::__runZoned@4048458 ]
[00441.580888][klog][bare-dart : sp(0x40a5b6aa8a0) fp(0x40a5b6aa968) pc(0x219013713ff) *dart:async_::_runZonedGuarded ]
[00441.580912][klog][bare-dart : sp(0x40a5b6aa9c8) fp(0x40a5b6aa9e0) pc(0x219028be660) *dart:isolate_::__startIsolate@1026248_<anonymous closure> ]
[00441.580904][klog][bare-dart : sp(0x40a5b6aa9b0) fp(0x40a5b6aa9b8) pc(0x219028da68a) *dart:core__Closure@0150898_dyn_call ]
[00441.580896][klog][bare-dart : sp(0x40a5b6aa978) fp(0x40a5b6aa9a0) pc(0x219028c0caf) *dart:ui_::__runMainZoned@19065589_<anonymous closure> ]