Fixing 3.1.1 crash, adding crash symbolication script and instruction…

…s in README

README.md

@@ -320,3 +320,19 @@ Tune your MIDI software to send only one of the two signals, either ok button pr
  - The code is based on the *SwitcherPanel*-Democode (Version 3.5) provided by Blackmagic.
  - [VVOSC](http://code.google.com/p/vvopensource/) is used as OSC-framework.
  - Program icon based heavily on the ATEM Software Control icon by [Blackmagic Design](http://www.blackmagicdesign.com).
+
+ ----------
+
+## Developer Resources
+
+### Find what line a crash occured on given a crash report (on MacOS)
+
+People like to send crash reports in issues.  You can use this method to find out which line of the program crashed from just the crash report and version number.
+
+1. Download the `atemOSC.debug.zip` file associated with the release that crashed and unzip it
+2. At a command line, `cd` into the unzipped folder (Usually `~/Downloads/atemOSC.debug`)
+3. Copy the crash report into a file (e.g. `crash.log`) and save it to the unzipped folder
+4. Copy the `find_crash` bash script from the root of this repository into that folder as well
+5. Run `./find_crash crash.log`, replacing `crash.log` with whatever your crash report file is named
+6. The script should tell you which line in which file caused the crash
+

atemOSC/AppDelegate.mm

@@ -527,7 +527,7 @@ - (void)switcherConnected
 
 		// Audio Inputs
 		IBMDSwitcherFairlightAudioInputIterator* audioInputIterator = NULL;
-		if (SUCCEEDED(mAudioMixer->CreateIterator(IID_IBMDSwitcherFairlightAudioInputIterator, (void**)&audioInputIterator)))
+		if (SUCCEEDED(mFairlightAudioMixer->CreateIterator(IID_IBMDSwitcherFairlightAudioInputIterator, (void**)&audioInputIterator)))
 		{
 			IBMDSwitcherFairlightAudioInput* audioInput = NULL;
 			while (S_OK == audioInputIterator->Next(&audioInput))

find_crash

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+# Usage: ./find_crash <crash_file>
+crashed_thread=$(cat $1 | grep "Crashed Thread" | cut -d' ' -f3)
+start_loc=$(cat $1 | grep "Binary Images" -A1 | grep -v Binary | cut -d' ' -f1)
+crash_loc=$(cat $1 | grep "Thread $crashed_thread Crashed" -A1 | grep -v Thread | cut -d' ' -f3)
+xcrun atos -o atemOSC.app.dSYM/Contents/Resources/DWARF/atemOSC -arch x86_64 -l $start_loc $crash_loc