Default implementation of QueryInterface needs to NULL result on failure.

2024-10-10 03:45:46 +00:00 · 1998-07-21 21:32:52 +00:00 · 1998-07-21 21:32:52 +00:00 · 1b7aa79e95
commit 1b7aa79e95
parent cf3031342e
1 changed files with 3 additions and 0 deletions
--- a/xpcom/src/nsISupports.h
+++ b/xpcom/src/nsISupports.h
@ -218,6 +218,9 @@ nsresult _class::QueryInterface(REFNSIID aIID, void** aInstancePtr)      \
  if (NULL == aInstancePtr) {                                            \
    return NS_ERROR_NULL_POINTER;                                        \
  }                                                                      \
+                                                                         \
+  *aInstancePtr = NULL;                                                  \
+                                                                         \
  static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID);                 \
  static NS_DEFINE_IID(kClassIID, _classiiddef);                         \
  if (aIID.Equals(kClassIID)) {                                          \