intermittent panic in ShardQueue #412
Description
Describe the bug
[Error] GOPOOL: panic in pool: gopool.DefaultPool: runtime error: invalid memory address or nil pointer dereference: goroutine 2642567 [running]:
runtime/debug.Stack()
/usr/local/go/src/runtime/debug/stack.go:24 +0x5e
github.com/bytedance/gopkg/util/gopool.(*worker).run.func1.1.1()
/root/tmp/starfs/go/pkg/mod/github.com/bytedance/gopkg@v0.1.1/util/gopool/worker.go:64 +0x8b
panic({0x15eea20?, 0x23fb5f0?})
/usr/local/go/src/runtime/panic.go:770 +0x132
github.com/cloudwego/netpoll.(*UnsafeLinkBuffer).WriteBuffer(0x0?, 0xc02e8d2790?)
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/nocopy_linkbuffer.go:453 +0x2d
github.com/cloudwego/netpoll.(*UnsafeLinkBuffer).Append(0x7fd8b84bffc8?, {0x19edf00?, 0xcdb9d90000?})
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/nocopy_linkbuffer.go:439 +0x2d
github.com/cloudwego/netpoll.(*connection).Append(0x599500?, {0x19edf00?, 0xcdb9d90000?})
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/connection_impl.go:246 +0x25
github.com/cloudwego/netpoll/mux.(*ShardQueue).deal(0xcdb79f8fa0, {0xd6aee6a200, 0x1, 0xcd74868b40?})
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/mux/shard_queue.go:179 +0x8b
github.com/cloudwego/netpoll/mux.(*ShardQueue).foreach.func1()
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/mux/shard_queue.go:153 +0x13c
github.com/bytedance/gopkg/util/gopool.(*worker).run.func1.1(0x19ee5f8?, 0xcb57e5f980?)
/root/tmp/starfs/go/pkg/mod/github.com/bytedance/gopkg@v0.1.1/util/gopool/worker.go:69 +0x57
github.com/bytedance/gopkg/util/gopool.(*worker).run.func1()
/root/tmp/starfs/go/pkg/mod/github.com/bytedance/gopkg@v0.1.1/util/gopool/worker.go:70 +0xe9
created by github.com/bytedance/gopkg/util/gopool.(*worker).run in goroutine 2673576
/root/tmp/starfs/go/pkg/mod/github.com/bytedance/gopkg@v0.1.1/util/gopool/worker.go:41 +0x4f
2026/02/14 10:52:05.529837 logger.go:190: [Error] GOPOOL: panic in pool: gopool.DefaultPool: runtime error: invalid memory address or nil pointer dereference: goroutine 13384279 [running]:
runtime/debug.Stack()
/usr/local/go/src/runtime/debug/stack.go:24 +0x5e
github.com/bytedance/gopkg/util/gopool.(*worker).run.func1.1.1()
/root/tmp/starfs/go/pkg/mod/github.com/bytedance/gopkg@v0.1.1/util/gopool/worker.go:64 +0x8b
panic({0x15eea20?, 0x23fb5f0?})
/usr/local/go/src/runtime/panic.go:770 +0x132
github.com/cloudwego/netpoll.(*UnsafeLinkBuffer).WriteBuffer(0x9d7d4c?, 0xc0f4ad03c0?)
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/nocopy_linkbuffer.go:453 +0x2d
github.com/cloudwego/netpoll.(*UnsafeLinkBuffer).Append(0xc8ce780008?, {0x19edf00?, 0xc0f75989c0?})
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/nocopy_linkbuffer.go:439 +0x2d
github.com/cloudwego/netpoll.(*connection).Append(0x9d7e00?, {0x19edf00?, 0xc0f75989c0?})
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/connection_impl.go:246 +0x25
github.com/cloudwego/netpoll/mux.(*ShardQueue).deal(0xce3d95c280, {0xcbe87d3600, 0x1, 0xc0f4fa3e00?})
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/mux/shard_queue.go:179 +0x8b
github.com/cloudwego/netpoll/mux.(*ShardQueue).foreach.func1()
/root/tmp/starfs/go/pkg/mod/github.com/cloudwego/netpoll@v0.7.1/mux/shard_queue.go:153 +0x13c
github.com/bytedance/gopkg/util/gopool.(*worker).run.func1.1(0xc00b45b7d0?, 0x5d2bfd?)
/root/tmp/starfs/go/pkg/mod/github.com/bytedance/gopkg@v0.1.1/util/gopool/worker.go:69 +0x57
github.com/bytedance/gopkg/util/gopool.(*worker).run.func1()
/root/tmp/starfs/go/pkg/mod/github.com/bytedance/gopkg@v0.1.1/util/gopool/worker.go:70 +0xe9
created by github.com/bytedance/gopkg/util/gopool.(*worker).run in goroutine 13372009
/root/tmp/starfs/go/pkg/mod/github.com/bytedance/gopkg@v0.1.1/util/gopool/worker.go:41 +0x4f