Memory access error: writing to the outside of a memory block; abort!
  # Writing 5 bytes to 0xffeb896c will clobber other memory blocks.
  #
  # The memory-block-to-be-written (start:0xffeb896c, size:4 bytes) is bound to 'input' at
  #    file:/prog.c::190, 14
  #
  #  0xffeb896c           0xffeb896f
  #  +--------------------------+
  #  |memory-block-to-be-written|......
  #  +--------------------------+
  #  ^~~~~~~~~~
  #  the write starts at the memory block begin.
  #
  # Stack trace (most recent call first) of the write.
  # [0]  file:/musl-1.1.10/src/string/stpcpy.c::16, 2
  # [1]  file:/musl-1.1.10/src/string/strcpy.c::17, 2
  # [2]  file:/prog.c::201, 17
  # [3]  file:/prog.c::236, 32
  # [4]  [libc-start-main]
Segmentation fault