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May 2, 2019
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doc: Warn about possible zombie apocalypse #60439

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12 changes: 12 additions & 0 deletions src/libstd/process.rs
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Expand Up @@ -134,6 +134,18 @@ use crate::sys_common::{AsInner, AsInnerMut, FromInner, IntoInner};
/// the parent process wait until the child has actually exited before
/// continuing.
///
/// # Warning
///
/// On some system, calling [`wait`] or similar is necessary for the OS to
/// release resources. A process that terminated but has not been waited on is
/// still around as a "zombie". Leaving too many zombies around may exhaust
/// global resources (for example process IDs).
///
/// The standard library does *not* automatically wait on child processes (not
/// even if the `Child` is dropped), it is up to the application developer to do
/// so. As a consequence, dropping `Child` handles without waiting on them first
/// is not recommended in long-running applications.
///
/// # Examples
///
/// ```should_panic
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