I've been getting the same crash report for days, every time I try to export a PDF in InDesign CS6. I'm not sure what's going on with this particular file, but I can export other files with no problem. I've deleted all .indd and .ai links and am not using any new fonts that won't export in other files. I've tried exporting single pages and the entire document, in different resolutions, and it crashes every time. I've pasted my latest crash report here: INDESIGN 6 CRASH REPORT - Pastebin.com
Export the file to IDML and open that.
Also note that you should patch InDesign (Help>updates) and that CS6 is unsupported under 10.11.
Thank you so much! I am not a graphic designer, but someone who uses InDesign all the time despite that fact. You have saved my butt!