Saxon

It's failed at line 16 executing (1 to $number-of-cols) ! <col>{$col-value}</col>

Because the expression (1 to $number-of-cols) occurs in a loop and is invariant over the loop, it's been bound to a system-allocated local variable, but no slot for this variable has been allocated on the stack.

It's evaluating variable $m1 (the function call to local:make-rows() has been inlined. The variable (internally, a GlobalParam has a null stackframeMap.

Allocation of slots to local variables happens in GlobalVariable.typeCheck(), called from Executable.typeCheckGlobalVariables(). At this the function call has already been inlined, but loop-lifting has not yet taken place, so there are no local variables.

The problem appears to be that the ComponentTracer expression (injected by virtue of the -TP option) is not doing a deep copy during function inlining -- only a shallow copy -- which means that after inlining, a subtree is shared between the original function and the inlined copy, which invalidates slot number allocation.