[PATCH v2 04/20] pretty: fix leaking key/value separator buffer

[Patrick Steinhardt <ps@pks.im>]

The `format_set_trailers_options()` function is responsible for parsing
a custom pretty format for trailers. It puts the parsed options into a
`struct process_trailer_options` structure, while the allocated memory
required for this will be put into separate caller-provided arguments.
It is thus the caller's responsibility to free the memory not via the
options structure, but via the other parameters.

While we do this alright for the separator and filter keys, we do not
free the memory associated with the key/value separator. Fix this to
plug this memory leak.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 pretty.c                      | 1 +
 t/t4205-log-pretty-formats.sh | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/pretty.c b/pretty.c
index 5e162d7204d..5e5ae452530 100644
--- a/pretty.c
+++ b/pretty.c
@@ -1776,6 +1776,7 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 		}
 	trailer_out:
 		string_list_clear(&filter_list, 0);
+		strbuf_release(&kvsepbuf);
 		strbuf_release(&sepbuf);
 		return ret;
 	}
diff --git a/t/t4205-log-pretty-formats.sh b/t/t4205-log-pretty-formats.sh
index 158b49d4b60..eb63ce011fa 100755
--- a/t/t4205-log-pretty-formats.sh
+++ b/t/t4205-log-pretty-formats.sh
@@ -5,6 +5,8 @@
 #
 
 test_description='Test pretty formats'
+
+TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 # Tested non-UTF-8 encoding
-- 
2.46.0.164.g477ce5ccd6.dirty