nitx: recover early from two failure conditions

src/doc/commands/commands_usage.nit

@@ -199,7 +199,9 @@ private class MPropertyCallVisitor
 	do
 		node.visit_all(self)
 		if not node isa ASendExpr then return
-		calls.add node.callsite.as(not null).mproperty
+		var callsite = node.callsite
+		if callsite == null then return
+		calls.add callsite.mproperty
 	end
 end
 

src/doc/term/term.nit

@@ -36,7 +36,7 @@ redef class CommandParser
 			error.print_message(no_color)
 			print ""
 		end
-		if cmd == null then return
+		if cmd == null or error isa CmdError then return
 		cmd.execute(no_color)
 	end
 end

tests/nitx.args

@@ -1,3 +1,5 @@
 base_simple3.nit -c A --no-color
 base_simple3.nit -c foo --no-color
 base_simple3.nit -c "defs: base_simple3::base_simple3" --no-color
+base_simple3.nit -c "lin: NotAnEntity" --no-color
+nitx_annotation_args.nit -I ../lib/core -c "call: nitx_annotation_args::A::foo" --no-color

tests/nitx_annotation_args.nit

@@ -0,0 +1,30 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+module nitx_annotation_args
+
+import kernel
+
+class A
+	autoinit y
+
+	var x = 0 is writable(set_x)
+
+	var y: Int
+
+	fun foo do end
+end
+
+var a = new A(1)
+a.foo

tests/sav/nitx_args4.res

@@ -0,0 +1,4 @@
+
+No result found for `NotAnEntity`...
+
+

tests/sav/nitx_args5.res

@@ -0,0 +1,8 @@
+
+Methods calling `nitx_annotation_args::A::foo`:
+
+ * nitx_annotation_args::nitx_annotation_args$core::Sys$main
+   # The main method of a program.
+   redef fun main
+   nitx_annotation_args.nit:29,1--30,5
+