At any given time Tcl enforces a limit on the number of recursive
calls that may be active for Tcl_Eval and related procedures
such as Tcl_GlobalEval.
Any call to Tcl_Eval that exceeds this depth is aborted with
By default the recursion limit is 1000.
Tcl_SetRecursionLimit may be used to change the maximum
allowable nesting depth for an interpreter.
The depth argument specifies a new limit for interp,
and Tcl_SetRecursionLimit returns the old limit.
To read out the old limit without modifying it, invoke
Tcl_SetRecursionLimit with depth equal to 0.
The Tcl_SetRecursionLimit only sets the size of the Tcl
call stack: it cannot by itself prevent stack overflows on the
C stack being used by the application. If your machine has a
limit on the size of the C stack, you may get stack overflows
before reaching the limit set by Tcl_SetRecursionLimit.
If this happens, see if there is a mechanism in your system for
increasing the maximum size of the C stack.