Can't extract CSR name from code in Python 3.14

[david-sawatzke]

Similar to #2152, python 3.14 once again changed the opcodes so the name extraction in migen fails. Unfortunately there doesn't seem to be an upstream patch yet, and upstream has moved to their own git host with closed registrations.

I've been able to fix it by inserting "LOAD_FAST_BORROW" : _bytecode_length_version_guard(3), into the _load_build_opcodes dict in migen/fhdl/tracer.py for anyone else experiencing this issue and unwilling to downgrade.

[inochisa]

I've been able to fix it by inserting "LOAD_FAST_BORROW" : _bytecode_length_version_guard(3), into the _load_build_opcodes dict in migen/fhdl/tracer.py for anyone else experiencing this issue and unwilling to downgrade.

Actually, the bytecode length is 2 instead of 3. Anyway, the migen can handle it as all instruction is 2 byte after python 3.6.