1. When GDB debugging tip:
Missing separate debuginfos, use: yum debuginfo - install glibc 2.28-72 el8_1. 1. X86_64 libgcc 8.3.1-4.5 el8. X86_64 libstdc++ 8.3.1-4.5 el8. X86_64

2. Perform:
Yum debuginfo - install glibc 2.28-72 el8_1. 1. X86_64 libgcc 8.3.1-4.5 el8. X86_64 libstdc++ 8.3.1-4.5 el8. X86_64

Tip:
Could not find debuginfo for package, glibc 2.28-72. El8_1. 1. X86_64
Could not find debuginfo for package: libgcc 8.3.1-4.5 el8. X86_64
Could not find debuginfo for package: libstdc++ 8.3.1-4.5 el8. X86_64
No debuginfo packages available to install
Dependencies resolved.
Nothing to do.
Complete!!!

Small 3. The first question is:
2 after the execution of meaning from tip/etc/yum repo. D/the following yum source can't find the corresponding package?

4. I yum source directory:
CentOS - AppStream. Repo CentOS - CR. Repo CentOS - fasttrack. Repo CentOS - Sources. '
CentOS - Base. Repo CentOS - Debuginfo. Repo CentOS - Media. Repo CentOS - Vault. '
CentOS - centosplus. Repo CentOS - Extras. Repo CentOS - PowerTools. '

CentOS - Debuginfo. 'the source I configuration is now baseurl=http://debuginfo.centos.org/centos/8/storage/x86_64/
Yum makecache succeeded,

5. I can't find it to yum source directory GDB prompt the three bags,
Yum yourself I don't think so, I will give all three packages wget,
Then the RPM - the ivh respectively installed three bags,
Tip has been installed, such as the installation of the first three packages prompt [before the two bags the same clew] :
Verifying... # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # [100%]
Preparing... # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # [100%]
Package libstdc++ 8.3.1-4.5. El8. X86_64 is already installed

6. Conclusion:
I think my GDB can output error information in detail,
The yum debuginfo - install and what is the difference between ordinary installation, [because my server is installed the three package he also suggests the]

To solve ah, make the most of