julia

65680923 - strings: transcode(String, ::Vector{UInt8}) no longer empties the input (#62040)

strings: transcode(String, ::Vector{UInt8}) no longer empties the input (#62040) `transcode(String, src)` for a `Vector{UInt8}` calls `String(transcode(UInt8, src))`. `transcode(UInt8, src)` returns `src` unchanged (identity dispatch), and `String(::Vector{UInt8})` takes ownership and zeroes it — so the call silently empties the caller's vector: ```julia julia> v = collect(codeunits("hello")); julia> transcode(String, v) "hello" julia> v UInt8[] ``` Capture the intermediate buffer and copy only when it aliases the input: ```julia b = transcode(UInt8, src) b === src ? String(copy(b)) : String(b) ``` `String(::Vector{UInt8})` is the only constructor that truncates its argument, and the identity dispatch only returns `src` for `Vector{UInt8}` among the inputs `String()` would steal. Fresh buffers (the `UInt16`/`UInt32` paths) still move without a copy. Fixes #28612 --- This PR was done with the assistance of gen AI. --------- Co-authored-by: Claude <noreply@anthropic.com>