Here a Followup with trace and osx dump.
The invocation was /Applications/Cog_r2776.app/Contents/MacOS/Squeak -trace -memory 1024m -eden 128m -codesize 128m -stackpages 128 /Users/tobias/Downloads/TrunkImage/Squeak4.5-13148.image 2>&1 >~/Desktop/Cog.trace
Best -Tobias
message:
Dear all, Dear Eliot
Using Cog r2776, the following doit in todays Squeak-Trunk (update 13148) [1] will crash the VM with the (OSX) crash report at the end of this mail.
SystemNavigation default obsoleteBehaviors chasePointers
No Crash.dmp was generated.
HTH
Best -Tobias