It does for me too on my Mac mini. JVERSION
Engine: j903/j64/darwin Release-b: commercial/2022-01-28T04:07:40 Library: 9.03.08 Qt IDE: 1.9.5/5.15.2(5.15.2) Platform: Darwin 64 Installer: J903 install InstallPath: /applications/j903 Contact: www.jsoftware.com After the 3rd or 4th crash I actually got an Apple crash report. The whole thing is too long to insert here, but I have kept a copy. The key part IMHO is this: +++++++++++++++++++++++++++++++++++ Notes: PC register does not match crashing frame (0x0 vs 0x115314C97) Crashed Thread: 0 Dispatch queue: com.apple.main-thread Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000028 Exception Codes: 0x0000000000000001, 0x0000000000000028 Termination Reason: Namespace SIGNAL, Code 11 Segmentation fault: 11 Terminating Process: exc handler [1282] VM Region Info: 0x28 is not in any region. Bytes before following region: 140723209813976 REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL UNUSED SPACE AT START ---> mapped file 7ffcaceec000-7ffcd260c000 [599.1M] r-x/r-x SM=COW ...t_id=e024f55b Error Formulating Crash Report: PC register does not match crashing frame (0x0 vs 0x115314C97) +++++++++++++++++++++++++++++++++++ AFAICT you can replace 'oops' with a string, name or numeral to get the crash. (Not tested extensively.) On Thu, 2 Nov 2023 at 21:33, Raul Miller <rauldmil...@gmail.com> wrote: > This reliably crashes J for me (all versions since j902, but j901 > didn't support the {{ }} notation). > > {{ a.=.'oops' y }} > > FYI, > > -- > Raul > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm