shard onEvict get an empty oldestEntry.so panic and not unLock

[s1040735149]

What is the issue you are having?

shard onEvict get an empty oldestEntry.so panic and not unLock

What is BigCache doing that it shouldn't?
fix panic

Minimal, Complete, and Verifiable Example

runtime error: index out of range [7] with length 0
goroutine 60116345 [running]:
runtime/debug.Stack(0x2153be0, 0x22c8700, 0xc1ec77bf40)
	/usr/local/go/src/runtime/debug/stack.go:24 +0x9f
git.in.zhihu.com/go/utils.SafelyRun.func1(0xc1ea5fdf40)
	/go/pkg/mod/git.in.zhihu.com/go/[email protected]/concurrent.go:20 +0x78
panic(0x22c8700, 0xc1ec77bf40)
	/usr/local/go/src/runtime/panic.go:969 +0x175
encoding/binary.littleEndian.Uint64(...)
	/usr/local/go/src/encoding/binary/binary.go:77
github.com/allegro/bigcache/v3.readTimestampFromEntry(...)
	/go/pkg/mod/github.com/allegro/bigcache/[email protected]/encoding.go:58
github.com/allegro/bigcache/v3.(*cacheShard).onEvict(0xc0ba3fd7a0, 0xc166605820, 0x0, 0xbc7e0, 0x623d7f7d, 0xc1ea5fd730, 0x0)
	/go/pkg/mod/github.com/allegro/bigcache/[email protected]/shard.go:271 +0x85
github.com/allegro/bigcache/v3.(*cacheShard).set(0xc0ba3fd7a0, 0xc1ecdc1ce0, 0x23, 0xd8bc05fe228582f8, 0xc1ecdd9200, 0x29d, 0x2c6, 0x0, 0x0)
	/go/pkg/mod/github.com/allegro/bigcache/[email protected]/shard.go:134 +0x31a
github.com/allegro/bigcache/v3.(*BigCache).Set(0xc000214680, 0xc1ecdc1ce0, 0x23, 0xc1ecdd9200, 0x29d, 0x2c6, 0x0, 0x2105a00)

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• ...Complete – Provide all parts needed to reproduce the problem
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Environment:

• Version (git sha or release): v3.0.1
• OS (e.g. from /etc/os-release or winver.exe): linux
• go version: go 1.15

[janisz]

@s1040735149 could you try v3.0.2