Processor crashing: TypeError: Cannot read properties of null (reading 'length')

[Rafael Ugolini]

Describe the bug
While running the processor, it's crashing from time to time

To Reproduce
SQD_TRACE=* sqd process

Expected behavior
Not crash

Environment (please complete the following information):

specify the version of the core packages (@subsquid/cli, @subsquid/substrate-processor, ...)
@subsquid/cli/2.4.3 darwin-arm64 node-v18.16.1
"@subsquid/archive-registry": "^3.1.0",
"@subsquid/evm-processor": "^1.7.1",
"@subsquid/graphql-server": "^4.2.0",
"@subsquid/typeorm-migration": "^1.2.0",
"@subsquid/typeorm-store": "^1.2.1",
node.js version: v18.16.1
npm version: 9.5.1
OS version: macOS 13.4

Applicable to decoding issues:

17:47:01 DEBUG sqd:processor:rpc rpc call
                                 rpcUrl: https://rpc.ankr.com/eth
                                 rpcId: 294
                                 rpcMethod: eth_getBlockReceipts
                                 rpcParams: ["0x10e6707"]
17:47:01 DEBUG sqd:processor:rpc rpc send
                                 rpcUrl: https://rpc.ankr.com/eth
                                 rpcId: 294
17:47:01 DEBUG sqd:http-client http request
                               httpRequestId: 119
                               httpRequestUrl: https://rpc.ankr.com/eth
                               httpRequestMethod: POST
                               httpRequestHeaders: [["content-type","application/json"]]
                               httpRequestBody: {"id":294,"jsonrpc":"2.0","method":"eth_getBlockReceipts","params":["0x10e6707"]}
17:47:02 DEBUG sqd:http-client http headers
                               httpRequestId: 119
                               httpResponseUrl: https://rpc.ankr.com/eth
                               httpResponseStatus: 200
                               httpResponseHeaders: [["access-control-allow-headers","Content-Type,Authorization"],["access-control-allow-methods","GET,POST,DELETE,OPTIONS"],["access-control-allow-origin","*"],["access-control-max-age","86400"],["cf-cache-status","DYNAMIC"],["cf-ray","7e8bdc612afb027e-CDG"],["connection","keep-alive"],["content-length","40"],["content-type","application/json"],["date","Tue, 18 Jul 2023 15:47:02 GMT"],["server","cloudflare"],["vary","Accept-Encoding"],["x-multirpc-response-type","1"]]
17:47:02 DEBUG sqd:http-client http body
                               httpRequestId: 119
                               httpResponseBody: {"jsonrpc":"2.0","id":294,"result":null}
17:47:02 DEBUG sqd:processor:rpc rpc response
                                 rpcUrl: https://rpc.ankr.com/eth
                                 rpcId: 294
                                 rpcMethod: eth_getBlockReceipts
                                 rpcParams: ["0x10e6707"]
                                 rpcResponse: {"jsonrpc":"2.0","id":294,"result":null}
17:47:02 FATAL sqd:processor TypeError: Cannot read properties of null (reading 'length')
                                 at EvmRpcDataSource.fetchReceiptsByBlock (squid/node_modules/@subsquid/evm-processor/lib/ds-rpc/client.js:221:56)
                                 at process.processTicksAndRejections (node:internal/process/task_queues:95:5)