--local-engine broken for all x86 Android devices

@jason-simmons

Steps

Open any flutter app.
Build the engine for android x86.
flutter run --local-engine=android_debug_unopt_x86 to an x86 Android device.

Result

E/flutter (10680): [ERROR:flutter/runtime/dart_vm_data.cc(19)] VM snapshot invalid and could not be inferred from settings.
E/flutter (10680): [ERROR:flutter/runtime/dart_vm.cc(241)] Could not setup VM data to bootstrap the VM from.
E/flutter (10680): [ERROR:flutter/runtime/dart_vm_lifecycle.cc(89)] Could not create Dart VM instance.
F/flutter (10680): [FATAL:flutter/shell/common/shell.cc(218)] Check failed: vm. Must be able to initialize the VM.

Cause

It seems like this is a combination of changes to how we select libflutter.so and also flutter-team-archive/engine#9260. I've been able to work around this by locally reverting flutter-team-archive/engine#9260. @jason-simmons found that the libflutter.so in the apk looks like it's being selected from flutter/flutter/bin/cache instead of flutter/engine/out. I'm not sure if the APK selection issue is the root cause of the VM failure or if there's some other issue here. Could potentially test for it by copying the locally built cached engine to flutter/flutter/bin/cache and seeing if the error still persists.

/cc @blasten

@mklim

found that the libflutter.so in the apk looks like it's being selected from flutter/flutter/bin/cache instead of flutter/engine/out

Did this work before @mklim? I'm looking at flutter.gradle before my changes, and it seems the script never read libflutter.so from flutter/engine/out. Only for arm/arm64 debug.

flutter/packages/flutter_tools/gradle/flutter.gradle

Lines 166 to 175 in 3d09f93

    
           flutterX86Jar = project.file("${project.buildDir}/${AndroidProject.FD_INTERMEDIATES}/flutter/flutter-x86.jar") 
        
           Task flutterX86JarTask = project.tasks.create("${flutterBuildPrefix}X86Jar", Jar) { 
        
               destinationDir flutterX86Jar.parentFile 
        
               archiveName flutterX86Jar.name 
        
               from("${flutterRoot}/bin/cache/artifacts/engine/android-x86/libflutter.so") { 
        
                   into "lib/x86" 
        
               } 
        
               from("${flutterRoot}/bin/cache/artifacts/engine/android-x64/libflutter.so") { 
        
                   into "lib/x86_64" 
        
               }

oh I see what happened, in master we run that code regardless if you have a local engine passed to it.

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--local-engine broken for all x86 Android devices #34279

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	flutterX86Jar = project.file("${project.buildDir}/${AndroidProject.FD_INTERMEDIATES}/flutter/flutter-x86.jar")
	Task flutterX86JarTask = project.tasks.create("${flutterBuildPrefix}X86Jar", Jar) {
	destinationDir flutterX86Jar.parentFile
	archiveName flutterX86Jar.name
	from("${flutterRoot}/bin/cache/artifacts/engine/android-x86/libflutter.so") {
	into "lib/x86"
	}
	from("${flutterRoot}/bin/cache/artifacts/engine/android-x64/libflutter.so") {
	into "lib/x86_64"
	}

--local-engine broken for all x86 Android devices #34279

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blasten commented on Jun 12, 2019

blasten commented on Jun 12, 2019

github-actions commented on Aug 29, 2021

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