Fix 11669: Assert failure in infer.cpp (#4982)

* Fix 11669: Assert failure in infer.cpp

* Format

Author: pfultz2

lib/infer.cpp

@@ -148,7 +148,7 @@ struct Interval {
                 result.setMinValue(minValue->intvalue + 1, minValue);
             if (minValue->isPossible() && minValue->bound == ValueFlow::Value::Bound::Lower)
                 result.setMinValue(minValue->intvalue, minValue);
-            if (!minValue->isImpossible() && minValue->bound == ValueFlow::Value::Bound::Point &&
+            if (!minValue->isImpossible() && (minValue->bound == ValueFlow::Value::Bound::Point || minValue->isKnown()) &&
                 std::count_if(values.begin(), values.end(), predicate) == 1)
                 return Interval::fromInt(minValue->intvalue, minValue);
         }

test/testvalueflow.cpp

@@ -7183,6 +7183,17 @@ class TestValueFlow : public TestFixture {
                "  a;\n"
                "}\n";
         valueOfTok(code, "a");
+
+        code = "void f(int i, int j, int n) {\n"
+               "    if ((j == 0) != (i == 0)) {}\n"
+               "    int t = 0;\n"
+               "    if (j > 0) {\n"
+               "        t = 1;\n"
+               "        if (n < j)\n"
+               "            n = j;\n"
+               "    }\n"
+               "}\n";
+        valueOfTok(code, "i");
     }
 
     void valueFlowCrashConstructorInitialization() { // #9577