The Stack Trace panel lists the Lua call stack at the pause point, innermost frame first. Each row has two columns:
(main chunk)
or (anonymous) when no name is available. C frames in the stack
are shown for context.
source:line for the currently-executing
line of that frame.
Selecting a row changes which frame provides Locals and Upvalues in the Variables tree. Globals are not affected. Double-clicking a Lua frame opens (or switches to) its source file and jumps to the current line. C frames cannot be opened.
A right-click context menu on a stack row offers Open Source
(same as double-click; disabled on C frames) and Copy Location
(copies source:line to the clipboard).
See Section 14.5.1, “Changed-value cue” for how the Stack Trace interacts with the changed-value cue.