fix crash in cppunitassertequals plugin

Change-Id: I0427c70aa3a7f55aba4bbe0fe571aab08596541a
Reviewed-on: https://gerrit.libreoffice.org/22922
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/compilerplugins/clang/cppunitassertequals.cxx b/compilerplugins/clang/cppunitassertequals.cxx
index 907f203d2917..f5db38421dd3 100644
--- a/compilerplugins/clang/cppunitassertequals.cxx
+++ b/compilerplugins/clang/cppunitassertequals.cxx
@@ -76,19 +76,19 @@ void CppunitAssertEquals::checkExpr(const Stmt* stmt)
         return;
     }
     parent = parentStmt(parent);
-    if (!isa<UnaryOperator>(parent)) {
+    if (!parent || !isa<UnaryOperator>(parent)) {
         return;
     }
     parent = parentStmt(parent);
-    if (!isa<CallExpr>(parent)) {
+    if (!parent || !isa<CallExpr>(parent)) {
         return;
     }
     const CallExpr* callExpr = dyn_cast<CallExpr>(parent);
-    if (callExpr->getDirectCallee() == nullptr) {
+    if (!callExpr || callExpr->getDirectCallee() == nullptr) {
         return;
     }
     const FunctionDecl* functionDecl = callExpr->getDirectCallee()->getCanonicalDecl();
-    if (functionDecl->getQualifiedNameAsString().find("Asserter::failIf") == std::string::npos) {
+    if (!functionDecl || functionDecl->getQualifiedNameAsString().find("Asserter::failIf") == std::string::npos) {
         return;
     }
     report(