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-rw-r--r--plumbing/format/gitignore/pattern.go2
1 files changed, 2 insertions, 0 deletions
diff --git a/plumbing/format/gitignore/pattern.go b/plumbing/format/gitignore/pattern.go
index 098cb50..450b3cd 100644
--- a/plumbing/format/gitignore/pattern.go
+++ b/plumbing/format/gitignore/pattern.go
@@ -39,6 +39,8 @@ type pattern struct {
// ParsePattern parses a gitignore pattern string into the Pattern structure.
func ParsePattern(p string, domain []string) Pattern {
+ // storing domain, copy it to ensure it isn't changed externally
+ domain = append([]string(nil), domain...)
res := pattern{domain: domain}
if strings.HasPrefix(p, inclusionPrefix) {