Android Studio 2.0+ crashes on OS X - android-studio-2.0

Question

i haven't been able to run any version of Android Studio 2.x. it crashes seemingly randomly with this same exception after < 1min of simply navigating through files in a project:
Exception Name: JavaNativeException
Description: java.lang.NullPointerException
at sun.lwawt.macosx.CAccessibility.getAccessibleIndexInParent(CAccessibility.java:287)
User Info: (null)
0 CoreFoundation 0x00007fff94a9e4f2 __exceptionPreprocess + 178
1 libobjc.A.dylib 0x00007fff88d51f7e objc_exception_throw + 48
2 CoreFoundation 0x00007fff94a9e439 -[NSException raise] + 9
3 JavaNativeFoundation 0x000000011be9251f JNFCallStaticIntMethod + 236
4 libawt_lwawt.dylib 0x000000011d7c8deb +[JavaComponentAccessibility createWithAccessible:withEnv:withView:] + 76
5 libawt_lwawt.dylib 0x000000011d7c930b -[JavaComponentAccessibility accessibilityFocusedUIElement] + 194
6 libawt_lwawt.dylib 0x000000011d79e4f6 -[AWTView accessibilityFocusedUIElement] + 156
7 AppKit 0x00007fff98c44d37 -[NSWindow(NSWindowAccessibility) accessibilityFocusedUIElement] + 118
8 libawt_lwawt.dylib 0x000000011d7c9069 +[JavaComponentAccessibility postFocusChanged:] + 96
9 Foundation 0x00007fff9427af5e __NSThreadPerformPerform + 279
10 CoreFoundation 0x00007fff94a33881 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
11 CoreFoundation 0x00007fff94a12fbc __CFRunLoopDoSources0 + 556
12 CoreFoundation 0x00007fff94a124df __CFRunLoopRun + 927
13 CoreFoundation 0x00007fff94a11ed8 CFRunLoopRunSpecific + 296
14 HIToolbox 0x00007fff963fe935 RunCurrentEventLoopInMode + 235
15 HIToolbox 0x00007fff963fe76f ReceiveNextEventCommon + 432
16 HIToolbox 0x00007fff963fe5af _BlockUntilNextEventMatchingListInModeWithFilter + 71
17 AppKit 0x00007fff98463efa _DPSNextEvent + 1067
18 AppKit 0x00007fff9846332a -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
19 libosxapp.dylib 0x000000011d8503aa -[NSApplicationAWT nextEventMatchingMask:untilDate:inMode:dequeue:] + 124
20 AppKit 0x00007fff98457e84 -[NSApplication run] + 682
21 libosxapp.dylib 0x000000011d85014d +[NSApplicationAWT runAWTLoopWithApp:] + 156
22 libawt_lwawt.dylib 0x000000011d7dd4b3 -[AWTStarter starter:] + 905
23 Foundation 0x00007fff9427af5e __NSThreadPerformPerform + 279
24 CoreFoundation 0x00007fff94a33881 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
25 CoreFoundation 0x00007fff94a12fbc __CFRunLoopDoSources0 + 556
26 CoreFoundation 0x00007fff94a124df __CFRunLoopRun + 927
27 CoreFoundation 0x00007fff94a11ed8 CFRunLoopRunSpecific + 296
28 studio 0x00000001000012f3 main + 357
29 studio 0x000000010000116c start + 52
30 ??? 0x0000000000000001 0x0 + 1
i'm running OS X 10.11.4 with Java version 1.8.0_92.
i'd seen some other references to this problem in the context of doing drag & drop operations, but the accepted solution of upgrading the JDK version doesn't seem to have resolved my issue.
FWIW i'm able to run Studio 1.5 without encountering this issue.

Answer 1

Answering a question of why it actually happens, but the source has this:
public static int getAccessibleIndexInParent(final Accessible a, final Component c) {
if (a == null) return 0;
return invokeAndWait(new Callable<Integer>() {
public Integer call() throws Exception {
final AccessibleContext ac = a.getAccessibleContext();
if (ac == null) return null;
return ac.getAccessibleIndexInParent();
}
}, c);
}
As you can see, the Callable returns null in some situations, which is fine for an Integer, but you get a NPE as soon as it unboxes that to return int. They probably should be checking for null and returning 0.