diff --git a/cairo/src/image_surface.rs b/cairo/src/image_surface.rs
index c6d3ddc7d097..65f4c650b77a 100644
--- a/cairo/src/image_surface.rs
+++ b/cairo/src/image_surface.rs
@@ -64,7 +64,12 @@ impl ImageSurface {
             (data.as_mut_ptr(), data.len())
         };
 
-        assert!(len >= (height * stride) as usize);
+        assert!(width >= 0, "width must be non-negative");
+        assert!(height >= 0, "height must be non-negative");
+        assert!(stride >= 0, "stride must be non-negative");
+        
+        // check if there is integer overflow
+        assert!(len >= height.checked_mul(stride).unwrap() as usize);
         let result = unsafe {
             ImageSurface::from_raw_full(ffi::cairo_image_surface_create_for_data(
                 ptr,
diff --git a/cairo/src/region.rs b/cairo/src/region.rs
index 930a5983dc9e..78e450ce2698 100644
--- a/cairo/src/region.rs
+++ b/cairo/src/region.rs
@@ -176,6 +176,8 @@ impl Region {
     #[doc(alias = "get_rectangle")]
     #[doc(alias = "cairo_region_get_rectangle")]
     pub fn rectangle(&self, nth: i32) -> RectangleInt {
+        let total_rectangles = self.num_rectangles();
+        assert!(nth >= 0 && nth < total_rectangles, "nth is out of range");
         unsafe {
             let rectangle: RectangleInt = ::std::mem::zeroed();
             ffi::cairo_region_get_rectangle(self.0.as_ptr(), nth, rectangle.to_raw_none());
diff --git a/gir b/gir
index 7047e1b433e2..ab56426172f9 160000
--- a/gir
+++ b/gir
@@ -1 +1 @@
-Subproject commit 7047e1b433e2ea39d96b25ae3242a2a780d2f59a
+Subproject commit ab56426172f9697eb909397c535bf127f7ad7128
diff --git a/glib/src/date.rs b/glib/src/date.rs
index 39947b99cc1a..83e5cf1de198 100644
--- a/glib/src/date.rs
+++ b/glib/src/date.rs
@@ -274,7 +274,7 @@ impl Date {
     #[doc(alias = "g_date_subtract_days")]
     pub fn subtract_days(&mut self, n_days: u32) -> Result<(), BoolError> {
         let julian = self.julian();
-        if julian > n_days {
+        if julian < n_days {
             Err(bool_error!("invalid number of days"))
         } else {
             unsafe {
diff --git a/glib/src/functions.rs b/glib/src/functions.rs
index 37e3dd660d2c..d666f6c90c8e 100644
--- a/glib/src/functions.rs
+++ b/glib/src/functions.rs
@@ -166,7 +166,7 @@ pub fn spawn_async_with_pipes<
         let mut standard_output = mem::MaybeUninit::uninit();
         let mut standard_error = mem::MaybeUninit::uninit();
         let mut error = ptr::null_mut();
-        let _ = ffi::g_spawn_async_with_pipes(
+        let success = ffi::g_spawn_async_with_pipes(
             working_directory.as_ref().to_glib_none().0,
             argv.to_glib_none().0,
             envp.to_glib_none().0,
@@ -179,11 +179,11 @@ pub fn spawn_async_with_pipes<
             standard_error.as_mut_ptr(),
             &mut error,
         );
-        let child_pid = from_glib(child_pid.assume_init());
-        let standard_input = standard_input.assume_init();
-        let standard_output = standard_output.assume_init();
-        let standard_error = standard_error.assume_init();
-        if error.is_null() {
+        if from_glib(success) {
+            let child_pid = from_glib(child_pid.assume_init());
+            let standard_input = standard_input.assume_init();
+            let standard_output = standard_output.assume_init();
+            let standard_error = standard_error.assume_init();
             #[cfg(not(windows))]
             {
                 Ok((
@@ -204,6 +204,8 @@ pub fn spawn_async_with_pipes<
         //     ))
         // }
         } else {
+            // Function failed, output parameters are not initialized
+            // Return the error without calling assume_init()
             Err(from_glib_full(error))
         }
     }
diff --git a/graphene/Gir.toml b/graphene/Gir.toml
index 348249edf9f1..449e98faccca 100644
--- a/graphene/Gir.toml
+++ b/graphene/Gir.toml
@@ -375,6 +375,15 @@ boxed_inline = true
     name = "init_from_vec3"
     rename = "from_vec3"
     manual = true # manual proper constructor
+    [[object.function]]
+    name = "intersect_box"
+    manual = true # fix issue 1805
+    [[object.function]]
+    name = "intersect_sphere"
+    manual = true # fix issue 1805
+    [[object.function]]
+    name = "intersect_triangle"
+    manual = true # fix issue 1805
 
 [[object]]
 name = "Graphene.Rect"
diff --git a/graphene/src/auto/ray.rs b/graphene/src/auto/ray.rs
index 1fa2acafb62f..e01b286d8a2e 100644
--- a/graphene/src/auto/ray.rs
+++ b/graphene/src/auto/ray.rs
@@ -2,7 +2,7 @@
 // from gir-files (https://github.com/gtk-rs/gir-files)
 // DO NOT EDIT
 
-use crate::{ffi, Box, Plane, Point3D, RayIntersectionKind, Sphere, Triangle, Vec3};
+use crate::{ffi, Box, Plane, Point3D, Sphere, Triangle, Vec3};
 use glib::translate::*;
 
 glib::wrapper! {
@@ -85,45 +85,6 @@ impl Ray {
         }
     }
 
-    #[doc(alias = "graphene_ray_intersect_box")]
-    pub fn intersect_box(&self, b: &Box) -> (RayIntersectionKind, f32) {
-        unsafe {
-            let mut t_out = std::mem::MaybeUninit::uninit();
-            let ret = from_glib(ffi::graphene_ray_intersect_box(
-                self.to_glib_none().0,
-                b.to_glib_none().0,
-                t_out.as_mut_ptr(),
-            ));
-            (ret, t_out.assume_init())
-        }
-    }
-
-    #[doc(alias = "graphene_ray_intersect_sphere")]
-    pub fn intersect_sphere(&self, s: &Sphere) -> (RayIntersectionKind, f32) {
-        unsafe {
-            let mut t_out = std::mem::MaybeUninit::uninit();
-            let ret = from_glib(ffi::graphene_ray_intersect_sphere(
-                self.to_glib_none().0,
-                s.to_glib_none().0,
-                t_out.as_mut_ptr(),
-            ));
-            (ret, t_out.assume_init())
-        }
-    }
-
-    #[doc(alias = "graphene_ray_intersect_triangle")]
-    pub fn intersect_triangle(&self, t: &Triangle) -> (RayIntersectionKind, f32) {
-        unsafe {
-            let mut t_out = std::mem::MaybeUninit::uninit();
-            let ret = from_glib(ffi::graphene_ray_intersect_triangle(
-                self.to_glib_none().0,
-                t.to_glib_none().0,
-                t_out.as_mut_ptr(),
-            ));
-            (ret, t_out.assume_init())
-        }
-    }
-
     #[doc(alias = "graphene_ray_intersects_box")]
     pub fn intersects_box(&self, b: &Box) -> bool {
         unsafe { ffi::graphene_ray_intersects_box(self.to_glib_none().0, b.to_glib_none().0) }
diff --git a/graphene/src/ray.rs b/graphene/src/ray.rs
index b13ed42024a3..5206dbd24c89 100644
--- a/graphene/src/ray.rs
+++ b/graphene/src/ray.rs
@@ -4,7 +4,7 @@ use std::fmt;
 
 use glib::translate::*;
 
-use crate::{ffi, Point3D, Ray, Vec3};
+use crate::{ffi, Box, Point3D, Ray, RayIntersectionKind, Sphere, Triangle, Vec3};
 
 impl Ray {
     #[doc(alias = "graphene_ray_init")]
@@ -35,6 +35,54 @@ impl Ray {
             ray
         }
     }
+
+    #[doc(alias = "graphene_ray_intersect_box")]
+    pub fn intersect_box(&self, b: &Box) -> (RayIntersectionKind, Option<f32>) {
+        unsafe {
+            let mut t_out = std::mem::MaybeUninit::uninit();
+            let ret = from_glib(ffi::graphene_ray_intersect_box(
+                self.to_glib_none().0,
+                b.to_glib_none().0,
+                t_out.as_mut_ptr(),
+            ));
+            match ret {
+                RayIntersectionKind::None => (ret, None),
+                _ => (ret, Some(t_out.assume_init())),
+            }
+        }
+    }
+
+    #[doc(alias = "graphene_ray_intersect_sphere")]
+    pub fn intersect_sphere(&self, s: &Sphere) -> (RayIntersectionKind, Option<f32>) {
+        unsafe {
+            let mut t_out = std::mem::MaybeUninit::uninit();
+            let ret = from_glib(ffi::graphene_ray_intersect_sphere(
+                self.to_glib_none().0,
+                s.to_glib_none().0,
+                t_out.as_mut_ptr(),
+            ));
+            match ret {
+                RayIntersectionKind::None => (ret, None),
+                _ => (ret, Some(t_out.assume_init())),
+            }
+        }
+    }
+
+    #[doc(alias = "graphene_ray_intersect_triangle")]
+    pub fn intersect_triangle(&self, t: &Triangle) -> (RayIntersectionKind, Option<f32>) {
+        unsafe {
+            let mut t_out = std::mem::MaybeUninit::uninit();
+            let ret = from_glib(ffi::graphene_ray_intersect_triangle(
+                self.to_glib_none().0,
+                t.to_glib_none().0,
+                t_out.as_mut_ptr(),
+            ));
+            match ret {
+                RayIntersectionKind::None => (ret, None),
+                _ => (ret, Some(t_out.assume_init())),
+            }
+        }
+    }
 }
 
 impl fmt::Debug for Ray {
diff --git a/pango/Gir.toml b/pango/Gir.toml
index fe5fc4c608e0..ad5bc0134659 100644
--- a/pango/Gir.toml
+++ b/pango/Gir.toml
@@ -96,11 +96,13 @@ status = "generate"
     ignore = true
     [[object.function]]
     name = "itemize"
+    manual = true
         [[object.function.parameter]]
         name = "cached_iter"
         const = true
     [[object.function]]
     name = "itemize_with_base_dir"
+    manual = true
         [[object.function.parameter]]
         name = "cached_iter"
         const = true
diff --git a/pango/src/auto/functions.rs b/pango/src/auto/functions.rs
index 0f60a789d07b..ecbb76078afe 100644
--- a/pango/src/auto/functions.rs
+++ b/pango/src/auto/functions.rs
@@ -3,7 +3,7 @@
 // DO NOT EDIT
 
 use crate::{
-    ffi, AttrIterator, AttrList, Context, Direction, Item, Stretch, Style, Variant, Weight,
+    ffi, AttrList, Direction, Stretch, Style, Variant, Weight,
 };
 use glib::translate::*;
 
@@ -56,49 +56,6 @@ pub fn is_zero_width(ch: char) -> bool {
     unsafe { from_glib(ffi::pango_is_zero_width(ch.into_glib())) }
 }
 
-#[doc(alias = "pango_itemize")]
-pub fn itemize(
-    context: &Context,
-    text: &str,
-    start_index: i32,
-    length: i32,
-    attrs: &AttrList,
-    cached_iter: Option<&AttrIterator>,
-) -> Vec<Item> {
-    unsafe {
-        FromGlibPtrContainer::from_glib_full(ffi::pango_itemize(
-            context.to_glib_none().0,
-            text.to_glib_none().0,
-            start_index,
-            length,
-            attrs.to_glib_none().0,
-            mut_override(cached_iter.to_glib_none().0),
-        ))
-    }
-}
-
-#[doc(alias = "pango_itemize_with_base_dir")]
-pub fn itemize_with_base_dir(
-    context: &Context,
-    base_dir: Direction,
-    text: &str,
-    start_index: i32,
-    length: i32,
-    attrs: &AttrList,
-    cached_iter: Option<&AttrIterator>,
-) -> Vec<Item> {
-    unsafe {
-        FromGlibPtrContainer::from_glib_full(ffi::pango_itemize_with_base_dir(
-            context.to_glib_none().0,
-            base_dir.into_glib(),
-            text.to_glib_none().0,
-            start_index,
-            length,
-            attrs.to_glib_none().0,
-            mut_override(cached_iter.to_glib_none().0),
-        ))
-    }
-}
 
 #[doc(alias = "pango_markup_parser_finish")]
 pub fn markup_parser_finish(
diff --git a/pango/src/functions.rs b/pango/src/functions.rs
index 9452a3515ffc..4e2f231b8241 100644
--- a/pango/src/functions.rs
+++ b/pango/src/functions.rs
@@ -6,7 +6,7 @@ use std::{ffi::c_char, ptr};
 pub use crate::auto::functions::*;
 #[cfg(feature = "v1_44")]
 use crate::ShapeFlags;
-use crate::{ffi, Analysis, GlyphString, Item};
+use crate::{ffi, Analysis, AttrIterator, AttrList, Context, Direction, GlyphString, Item};
 
 #[doc(alias = "pango_reorder_items")]
 pub fn reorder_items(logical_items: &glib::List<Item>) -> glib::List<Item> {
@@ -93,3 +93,65 @@ pub fn extents_to_pixels(
         ffi::pango_extents_to_pixels(inclusive.to_glib_none_mut().0, nearest.to_glib_none_mut().0);
     }
 }
+
+#[doc(alias = "pango_itemize")]
+pub fn itemize(
+    context: &Context,
+    text: &str,
+    start_index: i32,
+    length: i32,
+    attrs: &AttrList,
+    cached_iter: Option<&AttrIterator>,
+) -> Vec<Item> {
+    let total_length = text.len() as i32;
+    assert!(
+        start_index >= 0 && start_index < total_length,
+        "start_index is out of range"
+    );
+    assert!(
+        length >= 0 && start_index.checked_add(length).unwrap() < total_length,
+        "start_index + length is out of range"
+    );
+    unsafe {
+        FromGlibPtrContainer::from_glib_full(ffi::pango_itemize(
+            context.to_glib_none().0,
+            text.to_glib_none().0,
+            start_index,
+            length,
+            attrs.to_glib_none().0,
+            mut_override(cached_iter.to_glib_none().0),
+        ))
+    }
+}
+
+#[doc(alias = "pango_itemize_with_base_dir")]
+pub fn itemize_with_base_dir(
+    context: &Context,
+    base_dir: Direction,
+    text: &str,
+    start_index: i32,
+    length: i32,
+    attrs: &AttrList,
+    cached_iter: Option<&AttrIterator>,
+) -> Vec<Item> {
+    let total_length = text.len() as i32;
+    assert!(
+        start_index >= 0 && start_index < total_length,
+        "start_index is out of range"
+    );
+    assert!(
+        length >= 0 && start_index.checked_add(length).unwrap() < total_length,
+        "start_index + length is out of range"
+    );
+    unsafe {
+        FromGlibPtrContainer::from_glib_full(ffi::pango_itemize_with_base_dir(
+            context.to_glib_none().0,
+            base_dir.into_glib(),
+            text.to_glib_none().0,
+            start_index,
+            length,
+            attrs.to_glib_none().0,
+            mut_override(cached_iter.to_glib_none().0),
+        ))
+    }
+}