Mark GMutex mutex guards as #[must_use]

See gstreamer-rs commit b21f5764309f9f65666016a9069e1b938935e6f2

2 files changed, 2 insertions, 1 deletions

diff --git a/utils/fallbackswitch/src/base/aggregator_pad.rs b/utils/fallbackswitch/src/base/aggregator_pad.rs
index eb57f6143..38c473272 100644
--- a/utils/fallbackswitch/src/base/aggregator_pad.rs
+++ b/utils/fallbackswitch/src/base/aggregator_pad.rs
@@ -21,7 +21,7 @@ impl<O: IsA<AggregatorPad>> AggregatorPadExtManual for O {
     fn get_segment(&self) -> gst::Segment {
         unsafe {
             let ptr: &gst_base_sys::GstAggregatorPad = &*(self.as_ptr() as *const _);
-            super::utils::MutexGuard::lock(&ptr.parent.object.lock);
+            let _guard = super::utils::MutexGuard::lock(&ptr.parent.object.lock);
             from_glib_none(&ptr.segment as *const gst_sys::GstSegment)
         }
     }
diff --git a/utils/fallbackswitch/src/base/utils.rs b/utils/fallbackswitch/src/base/utils.rs
index dca8cf691..ff456cd06 100644
--- a/utils/fallbackswitch/src/base/utils.rs
+++ b/utils/fallbackswitch/src/base/utils.rs
@@ -9,6 +9,7 @@
 use glib::translate::mut_override;
 use glib_sys;
 
+#[must_use = "if unused the Mutex will immediately unlock"]
 pub struct MutexGuard<'a>(&'a glib_sys::GMutex);
 
 impl<'a> MutexGuard<'a> {