panic: runtime error: invalid memory address or nil pointer dereference

[Duanshouze]

version: github.com/go-redis/redis/v8 v8.11.5
problem scenario: Nearly two million calls per minute are made to interfaces such as "redis/hgetall" and "redis/set"

exception information:
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x48 pc=0xbaa29e]

goroutine 144316890 [running]:
github.com/go-redis/redis/v8/internal/pool.(*Conn).WithWriter(0xc016f805a0, {0x1e1f4c8?, 0xc010c98f00?}, 0x7270223a22796765?, 0xc0035ceee0)
/usr/local/app/go/pkg/mod/github.com/go-redis/redis/[email protected]/internal/pool/conn.go:76 +0x3e
github.com/go-redis/redis/v8.(*baseClient).pipelineProcessCmds(0xc016f805f0, {0x1e1f4c8, 0xc010c98f00}, 0x64696d227b3a3270?, {0xc01baeb290, 0x1, 0x1})
/usr/local/app/go/pkg/mod/github.com/go-redis/redis/[email protected]/redis.go:439 +0x85
github.com/go-redis/redis/v8.(*baseClient)._generalProcessPipeline.func1({0x1e1f4c8?, 0xc010c98f00?}, 0x303a22746e756f43?)
/usr/local/app/go/pkg/mod/github.com/go-redis/redis/[email protected]/redis.go:426 +0x3d
github.com/go-redis/redis/v8.(*baseClient).withConn.func2()
/usr/local/app/go/pkg/mod/github.com/go-redis/redis/[email protected]/redis.go:291 +0x36
created by github.com/go-redis/redis/v8.(*baseClient).withConn
/usr/local/app/go/pkg/mod/github.com/go-redis/redis/[email protected]/redis.go:291 +0x20a

[Duanshouze]

When the number of calls to Redis-related interfaces such as 'redis/hgetall' suddenly increases, the above-mentioned exception occurs, accompanied by a sudden increase in disk block device read bandwidth.