insertChain panics when struct tracer is set

[lightclient]

When a tracer is set while calling "insertChain", the client panics. Doesn't seem like OnTxStart is called before process.

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x38 pc=0x10155f144]

goroutine 1 [running]:
github.com/ethereum/go-ethereum/eth/tracers/logger.(*StructLogger).OnOpcode(0x14000273290, 0x0, 0x33, 0x1c9c380, 0x2, {0x101ba1de0, 0x14000329b18}, {0x0, 0x0, 0x101506be4?}, ...)
        /Users/matt/dev/go-ethereum/eth/tracers/logger/logger.go:214 +0x644
github.com/ethereum/go-ethereum/core/vm.(*EVMInterpreter).Run(0x140005d5440, 0x140000e69c0, {0x14000038340, 0x20, 0x20}, 0x0)
        /Users/matt/dev/go-ethereum/core/vm/interpreter.go:304 +0x8f0
github.com/ethereum/go-ethereum/core/vm.(*EVM).Call(0x140000f7900, {0x101b93640, 0x140004d8d68}, {0x0, 0xf, 0x3d, 0xf6, 0xd7, 0x32, 0x80, ...}, ...)
        /Users/matt/dev/go-ethereum/core/vm/evm.go:227 +0x780
github.com/ethereum/go-ethereum/core.ProcessBeaconBlockRoot({0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...}, ...)
        /Users/matt/dev/go-ethereum/core/state_processor.go:240 +0x240
github.com/ethereum/go-ethereum/core.(*StateProcessor).Process(0x140004d49e0, 0x1400040f680, 0x14000246f00, {0x140004e6a00, 0x0, 0x0, {0x0, 0x0, 0x0}, 0x0})
        /Users/matt/dev/go-ethereum/core/state_processor.go:80 +0x49c
github.com/ethereum/go-ethereum/core.(*BlockChain).processBlock(0x140000fa408, 0x1400040f680, 0x14000246f00, {0x0?, 0x101ba2438?, 0x1022ebd60?}, 0x1)
        /Users/matt/dev/go-ethereum/core/blockchain.go:1899 +0x220
github.com/ethereum/go-ethereum/core.(*BlockChain).insertChain(0x140000fa408, {0x1400038a9f8, 0x1, 0x1}, 0x1, 0x0)
        /Users/matt/dev/go-ethereum/core/blockchain.go:1818 +0x16ac
github.com/ethereum/go-ethereum/core.(*BlockChain).InsertChain(0x140000fa408, {0x1400038a9f8, 0x1, 0x1})
        /Users/matt/dev/go-ethereum/core/blockchain.go:1601 +0x908
github.com/ethereum/go-ethereum/tests.(*BlockTest).insertBlocks(0x101ba94a8?, 0x140000fa408)
        /Users/matt/dev/go-ethereum/tests/block_test_util.go:238 +0x21c
github.com/ethereum/go-ethereum/tests.(*BlockTest).Run(0x1400037c608, 0x0, {0x1016bf309, 0x4}, 0x0, 0x140004e6a00, 0x140004d1978)
        /Users/matt/dev/go-ethereum/tests/block_test_util.go:162 +0x478
main.blockTestCmd(0x140001fa900)
        /Users/matt/dev/go-ethereum/cmd/evm/blockrunner.go:84 +0x514
github.com/ethereum/go-ethereum/internal/flags.MigrateGlobalFlags.func2.1(0x140001fa900)
        /Users/matt/dev/go-ethereum/internal/flags/helpers.go:99 +0x38
github.com/urfave/cli/v2.(*Command).Run(0x10227f7a0, 0x140001fa900, {0x14000396320, 0x5, 0x5})
        /Users/matt/dev/go-workspace/pkg/mod/github.com/urfave/cli/v2@v2.25.7/command.go:274 +0x5e0
github.com/urfave/cli/v2.(*Command).Run(0x140003482c0, 0x140001fa300, {0x14000152000, 0x7, 0x7})
        /Users/matt/dev/go-workspace/pkg/mod/github.com/urfave/cli/v2@v2.25.7/command.go:267 +0x81c
github.com/urfave/cli/v2.(*App).RunContext(0x140001fc000, {0x101b9c6c0, 0x10231b3e0}, {0x14000152000, 0x7, 0x7})
        /Users/matt/dev/go-workspace/pkg/mod/github.com/urfave/cli/v2@v2.25.7/app.go:332 +0x4f8
github.com/urfave/cli/v2.(*App).Run(...)
        /Users/matt/dev/go-workspace/pkg/mod/github.com/urfave/cli/v2@v2.25.7/app.go:309
main.main()
        /Users/matt/dev/go-ethereum/cmd/evm/main.go:141 +0x4c
exit status 2

[lightclient]

cc @s1na

[s1na]

Yeah the the pre-block processors get the non-wrapped statedb. here is the fix for that: fbd1d19#diff-7ee5f952a6b64b5c8a5db54348910f6e901dcafce4afa172720c40713fe2e78bR80-R88