Fix #11012 FP unassignedVariable when passed in init list (#5684)

Author: chrchr-github

lib/checkunusedvar.cpp

@@ -1090,7 +1090,7 @@ void CheckUnusedVar::checkFunctionVariableUsage_iterateScopes(const Scope* const
         }
 
         else if (Token::Match(tok->previous(), "[{,] %var% [,}]")) {
-            variables.read(tok->varId(), tok);
+            variables.use(tok->varId(), tok);
         }
 
         else if (tok->varId() && Token::Match(tok, "%var% .")) {

test/testunusedvar.cpp

@@ -176,6 +176,7 @@ class TestUnusedVar : public TestFixture {
         TEST_CASE(localvararray3);  // ticket #3980
         TEST_CASE(localvararray4);  // ticket #4839
         TEST_CASE(localvararray5);  // ticket #7092
+        TEST_CASE(localvararray6);
         TEST_CASE(localvarstring1);
         TEST_CASE(localvarstring2); // ticket #2929
         TEST_CASE(localvarconst1);
@@ -6059,6 +6060,17 @@ class TestUnusedVar : public TestFixture {
         ASSERT_EQUALS("[test.cpp:2]: (style) Unused variable: v\n", errout.str());
     }
 
+    void localvararray6() {
+        functionVariableUsage("struct S { int* p; };\n" // #11012
+                              "void g(struct S* ps);\n"
+                              "void f() {\n"
+                              "    int i[2];\n"
+                              "    struct S s = { i };\n"
+                              "    g(&s);\n"
+                              "}\n");
+        ASSERT_EQUALS("", errout.str());
+    }
+
     void localvarstring1() { // ticket #1597
         functionVariableUsage("void foo() {\n"
                               "    std::string s;\n"