Merge branch 'jk/compiler-fixes-and-workarounds'

Small fixes and workarounds.

* jk/compiler-fixes-and-workarounds:
  revision: avoid leak when preparing bloom filter for "/"
  revision: avoid out-of-bounds read/write on empty pathspec
  config: work around gcc-10 -Wstringop-overflow warning

Author: gitster

config.c

@@ -3115,7 +3115,7 @@ static int git_config_copy_or_rename_section_in_file(const char *config_filename
 	}
 
 	while (fgets(buf, sizeof(buf), config_file)) {
-		int i;
+		unsigned i;
 		int length;
 		int is_section = 0;
 		char *output = buf;

revision.c

@@ -669,7 +669,6 @@ static void prepare_to_use_bloom_filter(struct rev_info *revs)
 	struct pathspec_item *pi;
 	char *path_alloc = NULL;
 	const char *path, *p;
-	int last_index;
 	size_t len;
 	int path_component_nr = 1;
 
@@ -692,19 +691,18 @@ static void prepare_to_use_bloom_filter(struct rev_info *revs)
 		return;
 
 	pi = &revs->pruning.pathspec.items[0];
-	last_index = pi->len - 1;
 
 	/* remove single trailing slash from path, if needed */
-	if (pi->match[last_index] == '/') {
-		path_alloc = xstrdup(pi->match);
-		path_alloc[last_index] = '\0';
+	if (pi->len > 0 && pi->match[pi->len - 1] == '/') {
+		path_alloc = xmemdupz(pi->match, pi->len - 1);
 		path = path_alloc;
 	} else
 		path = pi->match;
 
 	len = strlen(path);
 	if (!len) {
 		revs->bloom_filter_settings = NULL;
+		free(path_alloc);
 		return;
 	}