1 files changed, 19 insertions, 0 deletions
diff --git a/tools/slang-test/parse-diagnostic-util.cpp b/tools/slang-test/parse-diagnostic-util.cpp
index 41dae07f7..db16d0c7e 100644
--- a/tools/slang-test/parse-diagnostic-util.cpp
+++ b/tools/slang-test/parse-diagnostic-util.cpp
@@ -384,8 +384,27 @@ static SlangResult _findDownstreamCompiler(const UnownedStringSlice& slice, Slan
     return nullptr;
 }
 
+static bool _isWhitespace(const UnownedStringSlice& slice)
+{
+    for (const char c : slice)
+    {
+        if (!CharUtil::isWhitespace(c))
+        {
+            return false;
+        }
+    }
+    return true;
+}
+
 /* static */SlangResult ParseDiagnosticUtil::parseDiagnostics(const UnownedStringSlice& inText, List<DownstreamDiagnostic>& outDiagnostics)
 {
+    if (_isWhitespace(inText))
+    {
+        // If it's empty, then there are no diagnostics to add.
+        outDiagnostics.clear();
+        return SLANG_OK;
+    }
+
     // TODO(JS):
     // As it stands output of downstream compilers isn't standardized. This can be improved upon - and if so
     // we should have a function that will parse the standardized output