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| author | Daniel Henry-Mantilla <daniel.henrymantilla@gatewatcher.com> | 2019-09-03 12:17:03 +0200 |
|---|---|---|
| committer | Daniel Henry-Mantilla <daniel.henrymantilla@gatewatcher.com> | 2019-09-03 12:18:09 +0200 |
| commit | 23c76ff7b912f16f6fdbde167306b08e59353427 (patch) | |
| tree | 8ec65bbd78d768792d3193caa306253430d0a380 | |
| parent | 815dec9db156284b4f57a4ec34182ffc89218242 (diff) | |
| download | rust-23c76ff7b912f16f6fdbde167306b08e59353427.tar.gz rust-23c76ff7b912f16f6fdbde167306b08e59353427.zip | |
Added warning around code with reference to uninit bytes
| -rw-r--r-- | src/libstd/io/mod.rs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs index 5060f368229..495c0c8d172 100644 --- a/src/libstd/io/mod.rs +++ b/src/libstd/io/mod.rs @@ -371,6 +371,14 @@ where loop { if g.len == g.buf.len() { unsafe { + // FIXME(danielhenrymantilla): #42788 + // + // - This creates a (mut) reference to a slice of + // _uninitialized integers_. + // + // - This having defined behavior is **unstable**: + // it could become UB in the future, + // at which point it would have be changed. g.buf.reserve(reservation_size(r)); let capacity = g.buf.capacity(); g.buf.set_len(capacity); |