Problem can be relatively easily reproduced.
1) Cursor in middle of variable "current_offset" in line 4 of attached file
2) Then, in VERY fast succession...
2.1) Select line 4 by triple-clicking on track pad, and
2.2) Click trackpad and drag line 4 up towards blank line 3
3) SE crashes...
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00000133d8241398
Exception Note: EXC_CORPSE_NOTIFY
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [9965]
Notes:
1) I also observed this problem in the previous SE version.
2) Also seen in perl and other source files
SlickEdit Pro 2019 (v24.0.2.0)
Licensed number of users: Single user
License file: /Library/Application Support/SlickEdit/24/slickedit.lic
Build Date: April 1, 2020
Emulation: macOS
OS: macOS
OS Version: 10.15.4
Processor Architecture: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz 64 bit (16 cores)
Memory: 96% Load, 15818MB/16384MB Virtual
Shell Information: /Applications/SlickEditPro2019.app/Contents/MacOS/secsh -i
Screen Size: 1680 x 1050
Project Type: Python
Language: .py (Python)
Encoding: UTF-8, no signature
Installation Directory: /Applications/SlickEditPro2019.app/Contents/
Configuration Directory: /Users/tuchman/Library/Application Support/SlickEdit/24.0.2/
Migrated from: /Users/tuchman/Library/Application Support/SlickEdit/24.0.1/