Merge remote-tracking branch 'origin/topic/timw/1740-table-key-error'

* origin/topic/timw/1740-table-key-error:
  GH-1741: Print error if calling a non-hook with hook keyword
  GH-1740: Report a better error message if table key is not a list

CHANGES

@@ -1,3 +1,9 @@
+4.2.0-dev.432 | 2021-12-10 09:28:23 -0700
+
+  * GH-1741: Print error if calling a non-hook with hook keyword (Tim Wojtulewicz, Corelight)
+
+  * GH-1740: Report a better error message if table key is not a list (Tim Wojtulewicz, Corelight)
+
 4.2.0-dev.428 | 2021-12-09 14:58:53 -0700
 
   * GH-1125: Support GRE ARUBA headers (Tim Wojtulewicz, Corelight)

VERSION

@@ -1 +1 @@
-4.2.0-dev.428
+4.2.0-dev.432

src/Expr.cc

@@ -2626,7 +2626,7 @@ TypePtr AssignExpr::InitType() const
 	{
 	if ( op1->Tag() != EXPR_LIST )
 		{
-		Error("bad initializer");
+		Error("bad initializer, first operand should be a list");
 		return nullptr;
 		}
 
@@ -3490,7 +3490,10 @@ TableConstructorExpr::TableConstructorExpr(ListExprPtr constructor_list,
 			SetType(init_type(op.get()));
 
 			if ( ! type )
+				{
 				SetError();
+				return;
+				}
 
 			else if ( type->Tag() != TYPE_TABLE || type->AsTableType()->IsSet() )
 				SetError("values in table(...) constructor do not specify a table");

src/parse.y

@@ -721,8 +721,12 @@ expr:
 			{
 			--in_hook;
 			set_location(@1, @3);
+
 			if ( $3->Tag() != EXPR_CALL )
 				$3->Error("not a valid hook call expression");
+			else if ( $3->AsCallExpr()->Func()->GetType()->AsFuncType()->Flavor() != FUNC_FLAVOR_HOOK )
+				$3->Error("hook keyword should only be used to call hooks");
+
 			$$ = $3;
 			}
 

testing/btest/Baseline/language.hook_calls/invalid.out

@@ -1,9 +1,10 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
-error in ./invalid.zeek, line 9: hook cannot be called directly, use hook operator (myhook)
+error in ./invalid.zeek, line 14: hook cannot be called directly, use hook operator (myhook)
-error in ./invalid.zeek, line 10: hook cannot be called directly, use hook operator (myhook)
+error in ./invalid.zeek, line 15: hook cannot be called directly, use hook operator (myhook)
-error in ./invalid.zeek, line 11: hook cannot be called directly, use hook operator (myhook)
+error in ./invalid.zeek, line 16: hook cannot be called directly, use hook operator (myhook)
-error in ./invalid.zeek, line 12: not a valid hook call expression (2 + 2)
+error in ./invalid.zeek, line 17: not a valid hook call expression (2 + 2)
-warning in ./invalid.zeek, line 12: expression value ignored (2 + 2)
+warning in ./invalid.zeek, line 17: expression value ignored (2 + 2)
-error in ./invalid.zeek, line 13: not a valid hook call expression (2 + 2)
+error in ./invalid.zeek, line 18: not a valid hook call expression (2 + 2)
-error in ./invalid.zeek, line 15: hook cannot be called directly, use hook operator (h)
+error in ./invalid.zeek, line 20: hook cannot be called directly, use hook operator (h)
-error in ./invalid.zeek, line 16: hook cannot be called directly, use hook operator (h)
+error in ./invalid.zeek, line 21: hook cannot be called directly, use hook operator (h)
+error in ./invalid.zeek, line 24: hook keyword should only be used to call hooks (foo())

testing/btest/language/hook_calls.zeek

@@ -66,6 +66,11 @@ hook myhook(i: count)
 	if ( i == 0 ) break;
 	}
 
+function foo()
+	{
+	print "foo()";
+	}
+
 event zeek_init()
 	{
 	myhook(3);
@@ -78,5 +83,6 @@ event zeek_init()
 	if ( h(3) )
 		print "hmm";
 	print "done";
+	hook foo();
 	}
 @TEST-END-FILE