null check HttpContext in SystemWebVersionLocator

CHANGELOG.md

@@ -23,6 +23,7 @@
 - Skip attachment if stream is empty ([#1854](https://github.com/getsentry/sentry-dotnet/pull/1854))
 - Allow some mobile options to be modified from defaults ([#1857](https://github.com/getsentry/sentry-dotnet/pull/1857))
 - Fix environment name casing issue ([#1861](https://github.com/getsentry/sentry-dotnet/pull/1861))
+- Null check HttpContext in SystemWebVersionLocator ([#1881](https://github.com/getsentry/sentry-dotnet/pull/1881))
 
 ## 3.20.1
 

src/Sentry.AspNet/Internal/SystemWebVersionLocator.cs

@@ -5,7 +5,7 @@ namespace Sentry.AspNet.Internal;
 
 internal static class SystemWebVersionLocator
 {
-    internal static string? Resolve(string? release, HttpContext context)
+    internal static string? Resolve(string? release, HttpContext? context)
     {
         if (!string.IsNullOrWhiteSpace(release))
         {
@@ -15,9 +15,9 @@ internal static class SystemWebVersionLocator
         return Resolve(context);
     }
 
-    internal static string? Resolve(HttpContext context)
+    internal static string? Resolve(HttpContext? context)
     {
-        if (context.ApplicationInstance?.GetType() is { } type)
+        if (context?.ApplicationInstance?.GetType() is { } type)
         {
             // Usually the type is ASP.global_asax and the BaseType is the Web Application.
             while (type is { Namespace: "ASP" })

test/Sentry.AspNet.Tests/Internal/SystemWebVersionLocatorTests.cs

@@ -14,6 +14,14 @@ public void GetCurrent_GetEntryAssemblyNull_HttpApplicationAssembly()
         Assert.Equal(expected, actual);
     }
 
+    [Fact]
+    public void Null_HttpContext()
+    {
+        var actual = SystemWebVersionLocator.Resolve((string)null, null);
+
+        Assert.Null(actual);
+    }
+
     [Fact]
     public void HttpApplicationAssembly_VersionParsing()
     {