morningman opened a new pull request #5349:
URL: https://github.com/apache/incubator-doris/pull/5349
## Proposed changes
When loading json data like `[]` (an empty array). BE will crash with stack:
```
*** Aborted at 1612273824 (unix time) try "date -d @1612273824" if you are
using GNU date ***
PC: @ 0xe0cce7 rapidjson::GenericValue<>::Accept<>()
*** SIGSEGV (@0xe) received by PID 36798 (TID 0x7f7812114700) from PID 14;
stack trace: ***
@ 0x7f791b74b470 (unknown)
@ 0xe0cce7 rapidjson::GenericValue<>::Accept<>()
@ 0x169ff79
_ZN5doris10JsonReader17_print_json_valueB5cxx11ERKN9rapidjson12GenericValueINS1_4UTF8IcEENS1_19MemoryPoolAllocatorINS1_12CrtAllocatorEEEEE
@ 0x16a0689 doris::JsonReader::_write_values_by_jsonpath()
@ 0x16a2cb4 doris::JsonReader::_handle_flat_array_complex_json()
@ 0x16a3761 doris::JsonScanner::get_next()
@ 0x1659bd4 doris::BrokerScanNode::scanner_scan()
@ 0x165a671 doris::BrokerScanNode::scanner_worker()
@ 0x281f67f execute_native_thread_routine
@ 0x7f791b5001c3 start_thread
@ 0x7f791b7fd12d __clone
```
## Types of changes
- [x] Bugfix (non-breaking change which fixes an issue)
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