diff options
Diffstat (limited to 'src/libstd')
| -rw-r--r-- | src/libstd/process.rs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/libstd/process.rs b/src/libstd/process.rs index c1addb46a0a..6e4c6e4c366 100644 --- a/src/libstd/process.rs +++ b/src/libstd/process.rs @@ -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 |