Fix #11492 FP uninitvar with try/catch (#4711)

Author: chrchr-github

lib/forwardanalyzer.cpp

@@ -770,7 +770,7 @@ struct ForwardTraversal {
                 tryTraversal.updateRange(tok->next(), endBlock, depth - 1);
                 bool bail = tryTraversal.actions.isModified();
                 if (bail)
-                    analyzer->lowerToPossible();
+                    return Break();
 
                 while (Token::simpleMatch(endBlock, "} catch (")) {
                     Token* endCatch = endBlock->linkAt(2);

test/testother.cpp

@@ -265,6 +265,7 @@ class TestOther : public TestFixture {
         TEST_CASE(moveCallback);
         TEST_CASE(moveClassVariable);
         TEST_CASE(forwardAndUsed);
+        TEST_CASE(moveAndReference);
 
         TEST_CASE(funcArgNamesDifferent);
         TEST_CASE(funcArgOrderDifferent);
@@ -10193,6 +10194,18 @@ class TestOther : public TestFixture {
         ASSERT_EQUALS("[test.cpp:4]: (warning) Access of forwarded variable 't'.\n", errout.str());
     }
 
+    void moveAndReference() { // #9791
+        check("void g(std::string&&);\n"
+              "void h(const std::string&);\n"
+              "void f() {\n"
+              "    std::string s;\n"
+              "    const std::string& r = s;\n"
+              "    g(std::move(s));\n"
+              "    h(r);\n"
+              "}\n");
+        ASSERT_EQUALS("[test.cpp:7]: (warning) Access of moved variable 'r'.\n", errout.str());
+    }
+
     void funcArgNamesDifferent() {
         check("void func1(int a, int b, int c);\n"
               "void func1(int a, int b, int c) { }\n"

test/testuninitvar.cpp

@@ -5407,6 +5407,18 @@ class TestUninitVar : public TestFixture {
                         "		(void)p[i];\n"
                         "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        // #11492
+        valueFlowUninit("void f() {\n"
+                        "    int i;\n"
+                        "    try {\n"
+                        "        i = 0;\n"
+                        "    }\n"
+                        "    catch (...) {\n"
+                        "        if (i) {}\n"
+                        "    }\n"
+                        "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void valueFlowUninitBreak() { // Do not show duplicate warnings about the same uninitialized value