fix: dereference of a possibly null reference.

.github/workflows/workflow.yml

@@ -109,7 +109,7 @@ jobs:
           Compress-Archive -Path (Join-Path $env:PUBLISH_DIR '*') -DestinationPath $archivePath -CompressionLevel Optimal
 
       - name: Upload build artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: ${{ needs.init.outputs.artifact-name }}
           path: ${{ env.RELEASE_DIR }}\${{ needs.init.outputs.archive-name }}
@@ -126,7 +126,7 @@ jobs:
       contents: write
     steps:
       - name: Download build artifact
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           name: ${{ needs.init.outputs.artifact-name }}
           path: release

src/SharpEmu.Libs/Kernel/KernelPthreadCompatExports.cs

@@ -3,6 +3,7 @@
 
 using SharpEmu.HLE;
 using System.Threading;
+using System.Diagnostics.CodeAnalysis;
 
 namespace SharpEmu.Libs.Kernel;
 
@@ -606,7 +607,7 @@ public static class KernelPthreadCompatExports
         return mutexAddress;
     }
 
-    private static bool TryResolveMutexState(CpuContext ctx, ulong mutexAddress, bool createIfZero, out ulong resolvedAddress, out PthreadMutexState? state)
+    private static bool TryResolveMutexState(CpuContext ctx, ulong mutexAddress, bool createIfZero, out ulong resolvedAddress, [NotNullWhen(true)] out PthreadMutexState? state)
     {
         resolvedAddress = 0;
         state = null;
@@ -739,7 +740,7 @@ public static class KernelPthreadCompatExports
         return condAddress;
     }
 
-    private static bool TryResolveCondState(CpuContext? ctx, ulong condAddress, bool createIfZero, out ulong resolvedAddress, out PthreadCondState? state)
+    private static bool TryResolveCondState(CpuContext? ctx, ulong condAddress, bool createIfZero, out ulong resolvedAddress, [NotNullWhen(true)] out PthreadCondState? state)
     {
         resolvedAddress = 0;
         state = null;

src/SharpEmu.Libs/Kernel/KernelPthreadExtendedCompatExports.cs

@@ -5,6 +5,7 @@ using SharpEmu.HLE;
 using System.Buffers.Binary;
 using System.Text;
 using System.Threading;
+using System.Diagnostics.CodeAnalysis;
 
 namespace SharpEmu.Libs.Kernel;
 
@@ -928,7 +929,7 @@ public static class KernelPthreadExtendedCompatExports
         return rwlockAddress;
     }
 
-    private static bool TryResolveRwlockState(CpuContext ctx, ulong rwlockAddress, bool createIfZero, out ulong resolvedAddress, out ReaderWriterLockSlim? rwlock)
+    private static bool TryResolveRwlockState(CpuContext ctx, ulong rwlockAddress, bool createIfZero, out ulong resolvedAddress, [NotNullWhen(true)] out ReaderWriterLockSlim? rwlock)
     {
         resolvedAddress = 0;
         rwlock = null;