I was also affected by this error. I think it has to do with the recent
time_t transition in experimental. I had libapt-pkg6.0t64:riscv64
2.7.10+nmu1~exp1 installed before.
- Bug#1063907: apt: symbol lookup error Michael Ott
- Bug#1063907: apt: symbol lookup error Julian Andres Klode
- Bug#1063907: time_t 64bit transition Michael Fladischer
