make test of esi plugin failed

git commit ddbc3567b4176cef7ef759bd1f93b6f76f5c7503

===================== Test 21) invalidly expanding url
lt-processor_test: test/processor_test.cc:483: int main(): Assertion `output_data_len == 0' failed.
Debug (processor): [addParseData] Implicit call to start()
Debug (parser): [_parse], Adding data of size 4 before (newly found) ESI tag as PRE node
Debug (parser): [_compareData] string [include ] is equal to data at position 9
Debug (parser): [_parse] Found [INCLUDE] tag at position 4
Debug (parser): [_searchData] Found full match of /> in [src=$...] at position 34
Debug (parser): [_parse] Handling include tag...
Debug (parser): [_processIncludeTag] Added include tag with url [$(HTTP_HOST)]
Debug (parser): [_parse] Added 2 node(s) during parse
Debug (processor): [_preprocess] Adding fetch request for url [$(HTTP_HOST)]
Debug (vars): [_parseCachedHeaders] Parsing headers
Debug (vars): [getValue] Unmatched simple variable [HTTP_HOST] not in dict variable form
Debug (expression): [expand] Got value [] for variable [HTTP_HOST]
Debug (expression): [expand] Returning final expanded expression []
Error: [_preprocess] Couldn't expand raw URL [$(HTTP_HOST)]
Debug (parser): [_setup] Returning true for empty data
Debug (parser): [_parse] Adding trailing text of size 4 starting at [ bar] as a PRE node
Debug (parser): [_parse] Added 1 node(s) during parse
Debug (processor): [_handleParseComplete] Parsed ESI document with 3 nodes
Debug (processor): [process] Processing ESI node [PRE] with data of size 4 starting with [foo <...]
Debug (processor): [process] Processing ESI node [INCLUDE] with data of size 0 starting with [(null...]
Error: [_getIncludeData] Data not requested for URL [$(HTTP_HOST)]; no data to include
Error: [_processEsiNode] Failed to process ESI doc node of type 2
Error: [process] Failed to process ESI node []
/bin/bash: line 5: 23903 Aborted ${dir}$tst
FAIL: processor_test