diff options
| -rw-r--r-- | core/string/ustring.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/core/string/ustring.cpp b/core/string/ustring.cpp index e93375bff7..13be7516d5 100644 --- a/core/string/ustring.cpp +++ b/core/string/ustring.cpp @@ -531,10 +531,12 @@ String &String::operator+=(const String &p_str) { resize(lhs_len + rhs_len + 1); - const char32_t *src = p_str.get_data(); + const char32_t *src = p_str.ptr(); char32_t *dst = ptrw() + lhs_len; - memcpy(dst, src, (rhs_len + 1) * sizeof(char32_t)); + // Don't copy the terminating null with `memcpy` to avoid undefined behavior when string is being added to itself (it would overlap the destination). + memcpy(dst, src, rhs_len * sizeof(char32_t)); + *(dst + rhs_len) = _null; return *this; } |