1[^:]*: Assembler messages: 2[^:]*:3: Warning: This instruction may be unpredictable if executed on M-profile cores with interrupts enabled. 3[^:]*:4: Warning: This instruction may be unpredictable if executed on M-profile cores with interrupts enabled. 4[^:]*:7: Error: Thumb does not support register indexing with writeback -- `ldr r1,\[r0,r1\]!' 5[^:]*:8: Error: r13 not allowed here -- `ldrsb sp,\[r2,#16\]!' 6