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Auto merge of #18302 - upsuper:atom-assert, r=bholley

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Harden assert for creating atom from raw pointer

One of Stylo's common assertion turns out to be from having a null Atom (see [Gecko 1385925 bug comment 7](https://bugzilla.mozilla.org/show_bug.cgi?id=1385925#c7)). It would be helpful if we can catch this kind of crash earlier via a release-assertion.

This may regress performance to some extent which I'm not sure. But we can probably have it there for diagnosis for now, and remove later.

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This commit is contained in:
bors-servo 2017-08-29 22:13:02 -05:00 • committed by GitHub
commit 421e6d8f91
1 changed files with 2 additions and 2 deletions
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4
components/style/gecko_string_cache/mod.rs
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@ -265,7 +265,7 @@ impl Atom {
/// called on it.
#[inline]
pub unsafe fn from_addrefed(ptr: *mut nsIAtom) -> Self {
debug_assert!(!ptr.is_null());
assert!(!ptr.is_null());
unsafe {
Atom(WeakAtom::new(ptr))
}
@ -378,7 +378,7 @@ impl From<String> for Atom {
impl From<*mut nsIAtom> for Atom {
#[inline]
fn from(ptr: *mut nsIAtom) -> Atom {
debug_assert!(!ptr.is_null());
assert!(!ptr.is_null());
unsafe {
let ret = Atom(WeakAtom::new(ptr));
if !ret.is_static() {