segfault on macOS

[JayKickliter]

I only installed Pothos today, so I can't yet offer any advice on how to fix this.

Install info

Pothos v0.6.1-release

$ brew list --versions | grep pothos
pothos 0.6.1
pothosblocks 0.5.1
pothosflow 0.6.1

Steps to reproduce:

1. Launch application:

$ PothosFlow
2018-05-09 16:53:12 PothosFlow.MainWindow: Welcome to Pothos v0.6.1-release
2018-05-09 16:53:12 PothosFlow.GraphEditor: Loading /Users/jay/Desktop/eval_playground.pothos
2018-05-09 16:53:12 PothosFlow.MainWindow: Initialization complete

2. Click Execute -> Show rendered graph view
3. Hit CMD-w (close window)

/usr/local/bin/PothosFlow: line 3: 83558 Segmentation fault: 11  /usr/local/Cellar/pothosflow/0.6.1/./PothosFlow.app/Contents/MacOS/PothosFlow $@

Stacktrace

Process:               PothosFlow [84069]
Path:                  /usr/local/Cellar/pothosflow/0.6.1/./PothosFlow.app/Contents/MacOS/PothosFlow
Identifier:            com.pothosware.pothosflow
Version:               0.6.1 (2018.05.09)
Code Type:             X86-64 (Native)
Parent Process:        ??? [84068]
Responsible:           PothosFlow [84069]
User ID:               501

Date/Time:             2018-05-09 17:25:29.361 -0700
OS Version:            Mac OS X 10.13.4 (17E199)
Report Version:        12


Time Awake Since Boot: 200000 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       EXC_I386_GPFLT
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [0]

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.pothosware.pothosflow     	0x0000000106650dac GraphEditor::handleShowRenderedGraphDialog() + 108
1   org.qt-project.QtWidgets      	0x000000010806d7f5 QAction::activate(QAction::ActionEvent) + 309
2   org.qt-project.QtCore         	0x0000000108d32a31 QObject::event(QEvent*) + 769
3   org.qt-project.QtWidgets      	0x0000000108076ffd QApplicationPrivate::notify_helper(QObject*, QEvent*) + 269
4   org.qt-project.QtWidgets      	0x000000010807839a QApplication::notify(QObject*, QEvent*) + 362
5   org.qt-project.QtCore         	0x0000000108d09798 QCoreApplication::notifyInternal2(QObject*, QEvent*) + 168
6   org.qt-project.QtCore         	0x0000000108d0a938 QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) + 840
7   libqcocoa.dylib               	0x0000000106d21227 0x106cf7000 + 172583
8   libqcocoa.dylib               	0x0000000106d21af1 0x106cf7000 + 174833
9   com.apple.CoreFoundation      	0x00007fff45eddd81 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
10  com.apple.CoreFoundation      	0x00007fff45f9565c __CFRunLoopDoSource0 + 108
11  com.apple.CoreFoundation      	0x00007fff45ec0d30 __CFRunLoopDoSources0 + 208
12  com.apple.CoreFoundation      	0x00007fff45ec01ad __CFRunLoopRun + 1293
13  com.apple.CoreFoundation      	0x00007fff45ebfa07 CFRunLoopRunSpecific + 487
14  com.apple.HIToolbox           	0x00007fff4519dd96 RunCurrentEventLoopInMode + 286
15  com.apple.HIToolbox           	0x00007fff4519da0f ReceiveNextEventCommon + 366
16  com.apple.HIToolbox           	0x00007fff4519d884 _BlockUntilNextEventMatchingListInModeWithFilter + 64
17  com.apple.AppKit              	0x00007fff43450a73 _DPSNextEvent + 2085
18  com.apple.AppKit              	0x00007fff43be6e34 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 3044
19  com.apple.AppKit              	0x00007fff43445885 -[NSApplication run] + 764
20  libqcocoa.dylib               	0x0000000106d208dd 0x106cf7000 + 170205
21  org.qt-project.QtCore         	0x0000000108d052be QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 398
22  org.qt-project.QtCore         	0x0000000108d09e91 QCoreApplication::exec() + 369
23  com.pothosware.pothosflow     	0x00000001065f46d1 main + 1121
24  libdyld.dylib                 	0x00007fff6e273015 start + 1