diff options
Diffstat (limited to 'components/layout/flow_ref.rs')
| -rw-r--r-- | components/layout/flow_ref.rs | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/components/layout/flow_ref.rs b/components/layout/flow_ref.rs index 65c07f81f19..b7d143734fb 100644 --- a/components/layout/flow_ref.rs +++ b/components/layout/flow_ref.rs @@ -14,7 +14,7 @@ use flow; use flow::{Flow, BaseFlow}; use std::mem; -use std::ops::{Deref, DerefMut}; +use std::ops::Deref; use std::ptr; use std::raw; use std::rt::heap; @@ -67,12 +67,10 @@ impl<'a> Deref for FlowRef { } } -impl DerefMut for FlowRef { - fn deref_mut<'a>(&mut self) -> &mut (Flow + 'a) { - unsafe { - mem::transmute_copy::<raw::TraitObject, &mut (Flow + 'a)>(&self.object) - } - } +// FIXME(https://github.com/servo/servo/issues/6503) This introduces unsound mutable aliasing. +// Try to replace it with Arc::get_mut (which checks that the reference count is 1). +pub unsafe fn deref_mut<'a>(flow_ref: &mut FlowRef) -> &mut (Flow + 'a) { + mem::transmute_copy::<raw::TraitObject, &mut (Flow + 'a)>(&flow_ref.object) } impl Drop for FlowRef { |