Tcl has become a lot harder to debug since [NRE]'s adoption.

The problem is intrinsic to the nature and goals of the [NRE]: [C] keeps a ''who called me stack'', [NRE] does its best to replace it with a ''who do we call next stack''. Most debugging tools like [gdb] are designed for C

The student would research different possibilities for assisting the developer to debug Tcl's core, including a simpler inspection of core dumps, and implement one of them.

One idea might be to devise a tracing mode, enabled with special compile flags, that would maintain a ''who called me stack'' (in memory? on file?). A second step would then be to arrange for the tracing output to be inspected from [gdb].