A Mozilla developer ran the µmix static analyzer on its codebase and incidentally found some issues regarding null checks in Skia. This fixes the issues that were found.

Downstream bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1278452

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2046563007

Review-Url: https://codereview.chromium.org/2046563007

3 files changed, 5 insertions, 5 deletions

diff --git a/src/pathops/SkPathOpsWinding.cpp b/src/pathops/SkPathOpsWinding.cpp
index 0abffb0586..584ebd457a 100644
--- a/src/pathops/SkPathOpsWinding.cpp
+++ b/src/pathops/SkPathOpsWinding.cpp
@@ -289,10 +289,10 @@ bool SkOpSpan::sortableTop(SkOpContour* contourHead) {
         bool ccw = ccw_dxdy(hit->fSlope, dir);
 //        SkASSERT(!approximately_zero(hit->fT) || !hit->fValid);
         SkOpSpan* span = hit->fSpan;
-        SkOpSegment* hitSegment = span->segment();
         if (!span) {
             return false;
         }
+        SkOpSegment* hitSegment = span->segment();
         if (span->windValue() == 0 && span->oppValue() == 0) {
             continue;
         }
diff --git a/src/ports/SkFontMgr_win_dw.cpp b/src/ports/SkFontMgr_win_dw.cpp
index e6e52d961a..bacac2ceef 100644
--- a/src/ports/SkFontMgr_win_dw.cpp
+++ b/src/ports/SkFontMgr_win_dw.cpp
@@ -45,7 +45,7 @@ public:
     // Takes ownership of stream.
     static HRESULT Create(SkStreamAsset* stream, StreamFontFileLoader** streamFontFileLoader) {
         *streamFontFileLoader = new StreamFontFileLoader(stream);
-        if (nullptr == streamFontFileLoader) {
+        if (nullptr == *streamFontFileLoader) {
             return E_OUTOFMEMORY;
         }
         return S_OK;
@@ -110,7 +110,7 @@ public:
     static HRESULT Create(IDWriteFactory* factory, IDWriteFontFileLoader* fontFileLoader,
                           StreamFontFileEnumerator** streamFontFileEnumerator) {
         *streamFontFileEnumerator = new StreamFontFileEnumerator(factory, fontFileLoader);
-        if (nullptr == streamFontFileEnumerator) {
+        if (nullptr == *streamFontFileEnumerator) {
             return E_OUTOFMEMORY;
         }
         return S_OK;
@@ -207,7 +207,7 @@ public:
     static HRESULT Create(IDWriteFontFileLoader* fontFileLoader,
                           StreamFontCollectionLoader** streamFontCollectionLoader) {
         *streamFontCollectionLoader = new StreamFontCollectionLoader(fontFileLoader);
-        if (nullptr == streamFontCollectionLoader) {
+        if (nullptr == *streamFontCollectionLoader) {
             return E_OUTOFMEMORY;
         }
         return S_OK;
diff --git a/src/utils/win/SkDWriteFontFileStream.cpp b/src/utils/win/SkDWriteFontFileStream.cpp
index 460f90e6c4..6c73441e72 100644
--- a/src/utils/win/SkDWriteFontFileStream.cpp
+++ b/src/utils/win/SkDWriteFontFileStream.cpp
@@ -139,7 +139,7 @@ HRESULT SkDWriteFontFileStreamWrapper::Create(SkStreamAsset* stream,
                                               SkDWriteFontFileStreamWrapper** streamFontFileStream)
 {
     *streamFontFileStream = new SkDWriteFontFileStreamWrapper(stream);
-    if (nullptr == streamFontFileStream) {
+    if (nullptr == *streamFontFileStream) {
         return E_OUTOFMEMORY;
     }
     return S_OK;