Merge pull request #11188 from blishko/issue-11181

[SMTChecker] Fix crash when analysing try-catch clauses with function call.

test/libsolidity/smtCheckerTests/try_catch/try_call_in_catch_1.sol

@@ -0,0 +1,13 @@
+pragma experimental SMTChecker;
+contract C {
+    function f() public returns (uint) {
+        try this.f() {
+        } catch Error(string memory) {
+			g();
+		}
+	}
+	function g() public pure returns (address) {
+	}
+}
+// ----
+// Warning 6321: (78-82): Unnamed return variable can remain unassigned. Add an explicit return with value to all non-reverting code paths or name the variable.

test/libsolidity/smtCheckerTests/try_catch/try_call_in_catch_2.sol

@@ -0,0 +1,16 @@
+pragma experimental SMTChecker;
+contract C {
+    function f() public returns (uint, uint) {
+        try this.f() {
+        } catch Error(string memory) {
+			g();
+		}
+	}
+	function g() public pure {
+		int test = 1;
+	}
+}
+// ----
+// Warning 6321: (78-82): Unnamed return variable can remain unassigned. Add an explicit return with value to all non-reverting code paths or name the variable.
+// Warning 6321: (84-88): Unnamed return variable can remain unassigned. Add an explicit return with value to all non-reverting code paths or name the variable.
+// Warning 2072: (199-207): Unused local variable.