Fix exitCode from ExecuteAssembly

ExecuteAssembly is initializing exitCode to 0 on entrance to the function.  If it then fails prior to exitCode being set when invoking the entry point, the exitCode remains 0 even though there was a failure, and corerun ends up returning a successful exit code.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/dlls/mscoree/unixinterface.cpp b/src/dlls/mscoree/unixinterface.cpp
index 2eaa1b81cb..1cd9d679b8 100644
--- a/src/dlls/mscoree/unixinterface.cpp
+++ b/src/dlls/mscoree/unixinterface.cpp
@@ -124,7 +124,11 @@ HRESULT ExecuteAssembly(
             LPCSTR entryPointMethodName,
             DWORD* exitCode)
 {
-    *exitCode = 0;
+    if (exitCode == NULL)
+    {
+        return HRESULT_FROM_WIN32(ERROR_INVALID_PARAMETER);
+    }
+    *exitCode = -1;
 
     DWORD error = PAL_InitializeCoreCLR(exePath, coreClrPath, true);
     HRESULT hr = HRESULT_FROM_WIN32(error);