Xcode has this nice debugging feature called 'Enable Guard Malloc', which is settable from Edit Schemes - Diagnostics (among a few other tools that I don't use as often). I just figured out, from the libgmalloc man page, that I can enable it when debugging with CLion by adding the following environment variable when editing the Run/Debug Configurations:
I've made a note so that I can use this in the future, but what about adding it as an option within the IDE? You usually only want it on for a brief amount of time when debugging some memory-related crash, although it is difficult to remember what to type here if you have to enable it manually. Just a thought.