"Blame" does not give me all changed lines

[dimitris93]

Below I print the total number of lines changed in a specific commit: f092795fe94ba727f7368b63d8eb1ecd39749fc4:

from git import Repo

repo = Repo("C:/Users/shiro/Desktop/lucene-solr/")

sum_lines = 0
for blame_commit, lines_list in repo.blame('HEAD', 'lucene/core/src/java/org/apache/lucene/analysis/Analyzer.java'):
    if blame_commit.hexsha == 'f092795fe94ba727f7368b63d8eb1ecd39749fc4':
        sum_lines += len(lines_list)
print sum_lines

The output is 38. However, if you simply go to apache/lucene-solr@f092795 and look at the commit yourself for file /lucene/analysis/Analyzer.java, the actual number of lines changed is not 38 but it is 47. Some lines are completely missing.

Why am I getting a wrong value ?