Segfault when dropping Context

[jeromegn]

I made a simple program (uses ChakraCore 0.11, current master) which segfaults when releasing a Context:

Process 29099 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x907f32000)
    frame #0: 0x000000010021a07c libChakraCore.dylib`VirtualTableInfoBase::GetVirtualTable(ptr=0x0000000907f32000) at vtinfo.h:89
   86  	class VirtualTableInfoBase
   87  	{
   88  	public:
-> 89  	    static INT_PTR GetVirtualTable(void * ptr) { return (*(INT_PTR*)ptr); }
   90  	protected:
   91  	    static void SetVirtualTable(void * ptr, INT_PTR vt) { *(INT_PTR*)ptr = vt; }
   92  	};
Target 0: (rustproxy) stopped.
(lldb) fr v
(void *) ptr = 0x0000000907f32000
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x907f32000)
  * frame #0: 0x000000010021a07c libChakraCore.dylib`VirtualTableInfoBase::GetVirtualTable(ptr=0x0000000907f32000) at vtinfo.h:89
    frame #1: 0x00000001003a2545 libChakraCore.dylib`VirtualTableInfo<JsrtContextCore>::HasVirtualTable(ptr=0x0000000907f32000) at vtinfo.h:101
    frame #2: 0x00000001003a2525 libChakraCore.dylib`JsrtContext::Is(ref=0x0000000907f32000) at JsrtContextCore.cpp:17
    frame #3: 0x00000001002ee3ac libChakraCore.dylib`::JsRelease(ref=0x0000000907f32000, count=0x00007ffeefbfe948) at Jsrt.cpp:682
    frame #4: 0x000000010002bb4b rustproxy`chakracore::util::release_reference::hb73d2b9d781d679f(reference=JsRef @ 0x00007ffeefbfe938) at util.rs:34
    frame #5: 0x000000010002613a rustproxy`_$LT$chakracore..context..Context$u20$as$u20$core..ops..drop..Drop$GT$::drop::hd59efd86683630b5(self=0x00007ffeefbfeae8) at macros.rs:75
    frame #6: 0x0000000100001af5 rustproxy`core::ptr::drop_in_place::h161661c845e43bd1((null)=0x00007ffeefbfeae8) at ptr.rs:59
    frame #7: 0x0000000100001a8a rustproxy`core::ptr::drop_in_place::h1072f79302fb8014((null)=0x00007ffeefbfeab0) at ptr.rs:59
    frame #8: 0x0000000100002bb4 rustproxy`rustproxy::main::h0a8ee1b9fd89ba26 at main.rs:210
<snip>

This is likely due to the latest ChakraCore, but I thought I'd still bring it up.

This isn't the first segfault I've seen related to the "Virtual Table"