Fix regression: If invalid instruction is handled, allow emulation to continue

qemu/accel/tcg/cpu-exec.c

@@ -359,6 +359,9 @@ static inline bool cpu_handle_exception(CPUState *cpu, int *ret)
             // we want to stop emulation
             *ret = EXCP_HLT;
             return true;
+        } else {
+            // Continue execution because user hints us it has been handled
+            cpu->exception_index = -1;
         }
     }