1 file changed, 28 insertions, 19 deletions
diff --git a/source/ui-refs.c b/source/ui-refs.c
index c375137..d89e3ea 100644
--- a/source/ui-refs.c
+++ b/source/ui-refs.c
@@ -16,11 +16,9 @@
 #include "ui-refs.h"
 #include "ui-shared.h"
 
-/*
- * The slice of a sorted ref list that one page shows, with end one past the
- * last row. size is what a full page holds, so it also decides whether the
- * list needs a pager.
- */
+// The slice of a sorted ref list that one page shows, with end one past the
+// last row. size is what a full page holds, so it also decides whether the
+// list needs a pager.
 struct ref_page {
 	int size;
 	int start;
@@ -80,10 +78,12 @@ static void collect_branches(struct reflist *list)
 
 static void print_branch_header(void)
 {
-	html("<tr class='nohover'><th class='left'>Branch</th>"
-	     "<th class='left'>Commit message</th>"
-	     "<th class='left col-author'>Author</th>"
-	     "<th colspan='2' class='left'>Age</th></tr>\n");
+	html(
+		"<tr class='nohover'><th class='left'>Branch</th>"
+		"<th class='left'>Commit message</th>"
+		"<th class='left col-author'>Author</th>"
+		"<th colspan='2' class='left'>Age</th></tr>\n"
+	);
 }
 
 static int print_branch(struct refinfo *ref)
@@ -100,7 +100,10 @@ static int print_branch(struct refinfo *ref)
 	if (ref->object->type == OBJ_COMMIT) {
 		cgit_commit_link(info->subject, NULL, NULL, name, NULL, NULL);
 		html("</td><td class='col-author'>");
-		cgit_open_filter(ctx.repo->email_filter, info->author_email, "refs");
+		// A filter must not be handed a NULL argument.
+		cgit_open_filter(
+			ctx.repo->email_filter, info->author_email ? info->author_email : "", "refs"
+		);
 		html_txt(info->author);
 		cgit_close_filter(ctx.repo->email_filter);
 		html("</td><td colspan='2'>");
@@ -124,10 +127,12 @@ static void collect_tags(struct reflist *list)
 
 static void print_tag_header(void)
 {
-	html("<tr class='nohover'><th class='left'>Tag</th>"
-	     "<th class='left'>Download</th>"
-	     "<th class='left col-author'>Author</th>"
-	     "<th colspan='2' class='left'>Age</th></tr>\n");
+	html(
+		"<tr class='nohover'><th class='left'>Tag</th>"
+		"<th class='left'>Download</th>"
+		"<th class='left col-author'>Author</th>"
+		"<th colspan='2' class='left'>Age</th></tr>\n"
+	);
 }
 
 static int print_tag(struct refinfo *ref)
@@ -162,7 +167,10 @@ static int print_tag(struct refinfo *ref)
 			cgit_close_filter(ctx.repo->email_filter);
 		}
 	} else if (ref->object->type == OBJ_COMMIT) {
-		cgit_open_filter(ctx.repo->email_filter, ref->commit->author_email, "refs");
+		cgit_open_filter(
+			ctx.repo->email_filter, ref->commit->author_email ? ref->commit->author_email : "",
+			"refs"
+		);
 		html_txt(ref->commit->author);
 		cgit_close_filter(ctx.repo->email_filter);
 	}
@@ -201,7 +209,8 @@ static void print_ref_pager(int ofs, int pagesize, int count, const char *path)
 	}
 	htmlf("%d - %d of %d", ofs + 1, ofs + pagesize < count ? ofs + pagesize : count, count);
 	if (ofs + pagesize < count) {
-		url = cgit_pageurl(ctx.qry.repo, cgit_fmt("refs/%s", path), cgit_fmt("ofs=%d", ofs + pagesize));
+		url = cgit_pageurl(ctx.qry.repo, cgit_fmt("refs/%s", path),
+			cgit_fmt("ofs=%d", ofs + pagesize));
 		html(" <a href='");
 		html_attr(url);
 		html("'>[next]</a>");
@@ -328,11 +337,11 @@ void cgit_print_refs(void)
 	cgit_print_layout_start();
 	html("<table class='list'>\n");
 
-	if (ctx.qry.path && starts_with(ctx.qry.path, "heads"))
+	if (ctx.qry.path && starts_with(ctx.qry.path, "heads")) {
 		print_branches_page(ctx.cfg.max_ref_count);
-	else if (ctx.qry.path && starts_with(ctx.qry.path, "tags"))
+	} else if (ctx.qry.path && starts_with(ctx.qry.path, "tags")) {
 		print_tags_page(ctx.cfg.max_ref_count);
-	else {
+	} else {
 		cgit_print_branches(ctx.cfg.max_ref_count);
 		html("<tr class='nohover'><td colspan='5'></td></tr>\n");
 		cgit_print_tags(ctx.cfg.max_ref_count);