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-rw-r--r--src/cmd/cgo/doc.go3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/cmd/cgo/doc.go b/src/cmd/cgo/doc.go
index 63413825a..7faece81c 100644
--- a/src/cmd/cgo/doc.go
+++ b/src/cmd/cgo/doc.go
@@ -73,6 +73,9 @@ A few special functions convert between Go and C types
by making copies of the data. In pseudo-Go definitions:
// Go string to C string
+ // The C string is allocated in the C heap using malloc.
+ // It is the caller's responsibility to arrange for it to be
+ // freed, such as by calling C.free.
func C.CString(string) *C.char
// C string to Go string