https://uberchromegw.corp.google.com/i/chromium.android/builders/Android%20WebView%20N%20%28dbg%29/builds/5774

signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
[FATAL:browser_view_renderer.cc(481)] Check failed: compositor_frame_consumer->ReturnedResourcesEmptyOnUI(). 

Stack Trace:
  RELADDR   FUNCTION                                                                                                        FILE:LINE
  000000000006bb2c  tgkill+8                                                                                                        /system/lib64/libc.so
  0000000000068f4c  pthread_kill+64                                                                                                 /system/lib64/libc.so
  0000000000023f58  raise+24                                                                                                        /system/lib64/libc.so
  000000000001c810  abort+52                                                                                                        /system/lib64/libc.so
  v------>  DebugBreak                                                                                                      /b/c/b/Android_arm64_Builder__dbg_/src/base/debug/debugger_posix.cc:221
  00000000009719b8  base::debug::BreakDebugger()+32                                                                                 /b/c/b/Android_arm64_Builder__dbg_/src/base/debug/debugger_posix.cc:251
  0000000000990448  logging::LogMessage::~LogMessage()+1180                                                                         /b/c/b/Android_arm64_Builder__dbg_/src/base/logging.cc:783
  00000000008fd8ec  android_webview::BrowserViewRenderer::ReleaseHardware()+208                                                     /b/c/b/Android_arm64_Builder__dbg_/src/android_webview/browser/browser_view_renderer.cc:481
  00000000008fd9dc  android_webview::BrowserViewRenderer::OnDetachedFromWindow()+156                                                /b/c/b/Android_arm64_Builder__dbg_/src/android_webview/browser/browser_view_renderer.cc:459
  0000000000930650  android_webview::AwContents::OnDetachedFromWindow(_JNIEnv*, base::android::JavaParamRef<_jobject*> const&)+152  /b/c/b/Android_arm64_Builder__dbg_/src/android_webview/native/aw_contents.cc:909
  0000000000930720  Java_org_chromium_android_1webview_AwContents_nativeOnDetachedFromWindow+152                                    /b/c/b/Android_arm64_Builder__dbg_/src/out/Debug/gen/android_webview/native/native_jni/android_webview/jni/AwContents_jni.h:442
  00000000006171b8  offset 0x591000                                                                                                 /data/app/com.android.webview-1/oat/arm64/base.odex

that's not good, that would leak I think

bulk editing to assign, rather than available.