a

4 files changed, 6 insertions, 5 deletions

diff --git a/src/chunk.cpp b/src/chunk.cpp
index 2222b40a..17fe1b49 100644
--- a/src/chunk.cpp
+++ b/src/chunk.cpp
@@ -28,7 +28,7 @@ bool chunk::empty(bool force) const noexcept
     for (auto i = 0uz; i < TILE_COUNT; i++)
         if (!_objects.empty() ||
             _ground && _ground->_ground_atlases[i] ||
-            _walls && _walls->atlases[i])
+            _walls && (_walls->atlases[i*2+0] || _walls->atlases[i*2+1]))
             return _maybe_empty = false;
     if (!_objects.empty())
         return false;
diff --git a/src/scenery.hpp b/src/scenery.hpp
index 9135b548..05b0683a 100644
--- a/src/scenery.hpp
+++ b/src/scenery.hpp
@@ -31,7 +31,7 @@ struct scenery_proto : object_proto
     ~scenery_proto() noexcept override;
     scenery_proto& operator=(const scenery_proto&);
     bool operator==(const object_proto& proto) const override;
-    operator bool() const;
+    explicit operator bool() const;
 };
 
 struct scenery final : object
diff --git a/src/tile-image.hpp b/src/tile-image.hpp
index 8b2c94e5..50cf0a33 100644
--- a/src/tile-image.hpp
+++ b/src/tile-image.hpp
@@ -15,7 +15,7 @@ struct image_proto_
     variant_t variant = 0;
 
     bool operator==(const image_proto_<Atlas>& b) const noexcept;
-    operator bool() const noexcept;
+    explicit operator bool() const noexcept;
 };
 
 template<typename Atlas, typename Proto>
@@ -28,7 +28,7 @@ struct image_ref_ final
     image_ref_(const image_ref_&) noexcept;
     image_ref_& operator=(const Proto& proto) noexcept;
     operator Proto() const noexcept;
-    operator bool() const noexcept;
+    explicit operator bool() const noexcept;
 };
 
 using tile_image_proto = image_proto_<tile_atlas>;
diff --git a/src/wall-atlas.cpp b/src/wall-atlas.cpp
index 90d5dfe7..b56a845b 100644
--- a/src/wall-atlas.cpp
+++ b/src/wall-atlas.cpp
@@ -47,7 +47,7 @@ void resolve_wall_rotations(std::vector<Wall::Direction>& array, const std::arra
                              dir_name, group_name, direction_index_to_name(G.from_rotation));
                 const auto& D2 = array[DAI2.val];
                 const auto& G2 = D2.*ptr;
-                if (!G2.is_defined)
+                if (!G2.is_defined || G2.from_rotation != (uint8_t)-1)
                     fm_throw("from_rotation for '{}/{}' points to empty group '{}/{}'"_cf,
                              dir_name, group_name, direction_index_to_name(G.from_rotation), group_name);
                 G.from_rotation = DAI2.val;
@@ -127,6 +127,7 @@ wall_atlas::wall_atlas(wall_atlas_def def, String path, const ImageView2D& img)
                 const auto& G = D->*gmemb;
                 fm_soft_assert(G.is_defined == !!G.count);
                 fm_soft_assert(G.is_defined == (G.index != (uint32_t)-1));
+                fm_soft_assert(G.from_rotation == (uint8_t)-1 || G.is_defined);
                 if (!G.is_defined)
                     continue;
                 found = true;