Transient "Error: VM::GetEnv failed: -2"

[audebert]

• Android version: 4.3
• Frida client version: 10.6.18
• Frida server version: frida-server-10.6.18-android-arm

Using Java.choose() directly outputs Error: VM::GetEnv failed: -2, but using it a second time with a small delay works. Here is a snippet of code showing the issue:

function choose(className) {
  Java.perform(function() {
    Java.choose(className, {
      'onMatch': function(instance) {
        console.log('[*] Instance found: ' + instance.toString());
      },
      'onComplete': function() {},
    });
  })
};

choose('android.view.View');

setTimeout(function() {
  choose(className);
}, 100);

Here is the output when run using frida -U 25390 -l script.js

Error: VM::GetEnv failed: -2
    at e (frida/node_modules/frida-java/lib/result.js:7)
    at frida/node_modules/frida-java/lib/vm.js:72
    at frida/node_modules/frida-java/lib/class-factory.js:339
    at frida/node_modules/frida-java/lib/class-factory.js:394
[*] Instance found: android.view.View{4249de38 V.ED.... ........ 0,95-720,96 #7f0e0cd5 app:id/bny}
[*] Instance found: android.view.View{42827d70 V.ED.... ........ 0,93-720,94 #7f0e0ce8 app:id/bog}
[*] Instance found: android.view.View{42bdbba8 I.ED.... ......I. 180,0-360,546}
[*] Instance found: android.view.View{42bdbd40 I.ED.... ......I. 360,0-540,546}
[*] Instance found: android.view.View{42bdbed8 I.ED.... ......I. 540,0-720,546}

The first call to choose() is necessary, else the second call fails with "Error: VM::GetEnv failed: -2". Making the second call directly, without setTimeout(), also gives "Error: VM::GetEnv failed: -2".

[oleavr]

This is a bug that was fixed a while ago – confirmed working in latest versions of Frida.