Stuck on Register Sample Code in Section 7.1 RTRM

[bcombes]

I'm going through the embedded rust discovery book for the STM32 Discovery kit. I was trying to following the sample code for 07-Registers, but when I try to debug the application using gdb, after the first next instruction, the program seems to halt, produces no further output and does not return control to the gdb console unless I escape with Ctrl + C.

Sample out put is reproduced below;

Breakpoint 1, registers::__cortex_m_rt_main_trampoline ()
    at src/07-registers/src/main.rs:7
7	#[entry]
(gdb) next
halted: PC: 0x080001f6
^C
Program received signal SIGINT, Interrupt.
0x0800023a in registers::__cortex_m_rt_main ()
    at src/07-registers/src/main.rs:28
28	    loop {}

Pretty new to embedded programming so no idea what the halted: PC 0x080001f6 output means and why I'm seeing a memory address instead of moving forward in the debug session. Any insight would be appreciated.