I took a look at the early-memcopy stuff, and at the registers at the time of the hang, and at the map output from my .elf image build. It appears that the code as-written is trying to copy a portion of the flash image onto itself. Both __flash_rodata_rom_start and __flash_r...
/home/pi/development/pico/pico/pico-sdk/tools/elf2uf2/main.cpp:75:1: error: no matching function for call to ‘std::vector<address_range>::vector(<brace-enclosed initializer list>)’ }; ^ In file included from /usr/include/c++/5/vector:64:0, from /home/pi/development/pico/pico/pico...