Record Case Detail

This function is in beta test. Please help improve it in the issues here.

=================================================================
==572==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fff8ea8ee3f at pc 0x561878ad5e8f bp 0x7fff8ea8dbc0 sp 0x7fff8ea8dbb0
READ of size 1 at 0x7fff8ea8ee3f thread T0
    #0 0x561878ad5e8e in printd (/out/package/lab5+0x7e8e)
    #1 0x561878ad3b0b in main (/out/package/lab5+0x5b0b)
    #2 0x7f4ea28f6c86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)
    #3 0x561878ad3f99 in _start (/out/package/lab5+0x5f99)

Address 0x7fff8ea8ee3f is located in stack of thread T0 at offset 4063 in frame
    #0 0x561878ad382f in main (/out/package/lab5+0x582f)

  This frame has 4 object(s):
    [32, 1232) 'help'
    [1280, 3680) 'print'
    [3712, 4012) 'stack'
    [4064, 4364) 'expr' <== Memory access at offset 4063 underflows this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
      (longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffe

Your answer may be identical to the JOJ answer in the first several lines.

However, the main problem you meet now is Runtime Error. And the exit code of your program is 1, which should be 0.

Please double check your code to solve this problem and try again.

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