diff --git a/core/fxge/dib/cfx_imagetransformer.cpp b/core/fxge/dib/cfx_imagetransformer.cpp
index 8e01127b0..f4ce4d915 100644
--- a/core/fxge/dib/cfx_imagetransformer.cpp
+++ b/core/fxge/dib/cfx_imagetransformer.cpp
@@ -315,14 +315,14 @@ bool CFX_ImageTransformer::Continue(IFX_PauseIndicator* pPause) {
   } else if (pDestMask) {
     CalcData cdata = {
         pDestMask.Get(), result2stretch, pSrcMaskBuf,
-        m_Storer.GetBitmap()->m_pAlphaMask->GetPitch(),
+        static_cast<uint32_t>(m_Storer.GetBitmap()->m_pAlphaMask->GetPitch()),
     };
     CalcMask(cdata);
   }
 
   CalcData cdata = {pTransformed.Get(), result2stretch,
                     m_Storer.GetBitmap()->GetBuffer(),
-                    m_Storer.GetBitmap()->GetPitch()};
+                    static_cast<uint32_t>(m_Storer.GetBitmap()->GetPitch())};
   if (m_Storer.GetBitmap()->IsAlphaMask()) {
     CalcAlpha(cdata);
   } else {
diff --git a/core/fpdfdoc/cpdf_metadata.cpp b/core/fpdfdoc/cpdf_metadata.cpp
index 323de4ffc..f11a0b0ad 100644
--- a/core/fpdfdoc/cpdf_metadata.cpp
+++ b/core/fpdfdoc/cpdf_metadata.cpp
@@ -74,7 +74,7 @@ std::vector<UnsupportedFeature> CPDF_Metadata::CheckForSharedForm() const {
   CFX_XMLParser parser(stream);
   std::unique_ptr<CFX_XMLDocument> doc = parser.Parse();
   if (!doc)
-    return {};
+    return std::vector<UnsupportedFeature>();
 
   std::vector<UnsupportedFeature> unsupported;
   CheckForSharedFormInternal(doc->GetRoot(), &unsupported);
diff --git a/third_party/base/span.h b/third_party/base/span.h
index 0fb627ba8..f71c362e2 100644
--- a/third_party/base/span.h
+++ b/third_party/base/span.h
@@ -214,7 +214,7 @@ class span {
   // Conversions from spans of compatible types: this allows a span<T> to be
   // seamlessly used as a span<const T>, but not the other way around.
   template <typename U, typename = internal::EnableIfLegalSpanConversion<U, T>>
-  constexpr span(const span<U>& other) : span(other.data(), other.size()) {}
+  span(const span<U>& other) : span(other.data(), other.size()) {}
   span& operator=(const span& other) noexcept = default;
   ~span() noexcept {
     if (!size_) {
diff --git a/third_party/base/span.h b/third_party/base/span.h
index 0fb627ba8..dda1fc8bc 100644
--- a/third_party/base/span.h
+++ b/third_party/base/span.h
@@ -204,7 +204,7 @@ class span {
   // size()|.
   template <typename Container,
             typename = internal::EnableIfSpanCompatibleContainer<Container, T>>
-  constexpr span(Container& container)
+  span(Container& container)
       : span(container.data(), container.size()) {}
   template <
       typename Container,
diff --git a/core/fpdfdoc/cpdf_dest.h b/core/fpdfdoc/cpdf_dest.h
index 7f4eb86c0..5e227f86e 100644
--- a/core/fpdfdoc/cpdf_dest.h
+++ b/core/fpdfdoc/cpdf_dest.h
@@ -41,7 +41,7 @@
               float* pZoom) const;
 
  private:
-  UnownedPtr<const CPDF_Array> const m_pArray;
+  UnownedPtr<const CPDF_Array> m_pArray;
 };
 
 #endif  // CORE_FPDFDOC_CPDF_DEST_H_