Rust: Weaken scopeNoFirst check

Author: hvitved

rust/ql/consistency-queries/CfgConsistency.ql

@@ -1,5 +1,7 @@
 import rust
-import codeql.rust.controlflow.internal.ControlFlowGraphImpl::Consistency
+import codeql.rust.controlflow.internal.ControlFlowGraphImpl::Consistency as Consistency
+import Consistency
+import codeql.rust.controlflow.ControlFlowGraph
 import codeql.rust.controlflow.internal.ControlFlowGraphImpl as CfgImpl
 import codeql.rust.controlflow.internal.Completion
 
@@ -17,3 +19,9 @@ query predicate nonPostOrderExpr(Expr e, string cls) {
     c instanceof NormalCompletion
   )
 }
+
+query predicate scopeNoFirst(CfgScope scope) {
+  Consistency::scopeNoFirst(scope) and
+  not scope = any(Function f | not exists(f.getBody())) and
+  not scope = any(ClosureExpr c | not exists(c.getBody()))
+}

rust/ql/test/library-tests/controlflow/Cfg.ql

@@ -1,7 +1,3 @@
-/**
- * @id rust/controlflow/cfg
- */
-
 import rust
 import codeql.rust.controlflow.ControlFlowGraph
 import TestUtils