new test

vlib/v/checker/tests/call_empty_or_block_err.out

@@ -0,0 +1,35 @@
+vlib/v/checker/tests/call_empty_or_block_err.vv:10:2: warning: unused variable: `a`
+    8 | 
+    9 | fn test_main() {
+   10 |     a := foo() or {
+      |     ^
+   11 |         foo() or {}
+   12 |     }
+vlib/v/checker/tests/call_empty_or_block_err.vv:14:2: warning: unused variable: `y`
+   12 |     }
+   13 | 
+   14 |     y := if c := foo() {
+      |     ^
+   15 |         dump(c)
+   16 |         bar() or {}
+vlib/v/checker/tests/call_empty_or_block_err.vv:21:2: warning: unused variable: `z`
+   19 |     }
+   20 | 
+   21 |     z := if d := foo() {
+      |     ^
+   22 |         dump(d)
+   23 |         bar() or {}
+vlib/v/checker/tests/call_empty_or_block_err.vv:11:9: error: assignment requires a non empty `or {}` block
+    9 | fn test_main() {
+   10 |     a := foo() or {
+   11 |         foo() or {}
+      |               ~~~~~
+   12 |     }
+   13 |
+vlib/v/checker/tests/call_empty_or_block_err.vv:16:3: error: the final expression in `if` or `match`, must have a value of a non-void type
+   14 |     y := if c := foo() {
+   15 |         dump(c)
+   16 |         bar() or {}
+      |         ~~~~~
+   17 |     } else {
+   18 |         false

vlib/v/checker/tests/call_empty_or_block_err.vv

@@ -0,0 +1,25 @@
+fn foo() !bool {
+	return true
+}
+
+fn bar() ! {
+}
+
+fn test_main() {
+	a := foo() or { foo() or {} }
+
+	y := if c := foo() {
+		dump(c)
+		bar() or {}
+	} else {
+		false
+	}
+
+	z := if d := foo() {
+		dump(d)
+		bar() or {}
+		true
+	} else {
+		false
+	}
+}