Changing revision date of module in certain way causes odd compile error on uses reference, even stranger way of changing it back removes compile error

[davidmichaelkarr]

I'm seeing a very odd sequence of events working with a simple module. See more information past the code block. I'm using the following:

/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
module bar {
    yang-version 1;
    namespace "urn:yang:bar";
    prefix "bar";

    import baz {
        prefix "baz";
    }

    revision "2014-03-21" { // Test: change "21" to "22"
    }

    grouping machine-def {

    }

    grouping stuff {
        uses machine-def; // Causes compile error on this line: Grouping 'machine-def' not found
    }

    container factory {
        container alpha {
            uses baz:machine-def;
        }
        container beta {
            uses baz:machine-def;
        }
    }

    rpc create-factory {
        input {
            uses baz:machine-def;
        }
    }

    rpc create-nested-factory {
        input {
            container nested {
                uses baz:machine-def;
            }
        }
    }

    grouping machine-types {
        container types {
            choice machine-type {
            }
        }
    }

    grouping machine-ext {
        uses machine-types {
            augment "types/machine-type" {
                case type-a {
                    leaf id {
                        type string;
                    }
                }
            }
        }
    }

}

I put my cursor just past the date value on the "revision" statement, sitting on the ending double quote. I then pressed Backspace to remove the "1", and then pressed "2". At that point, a red marker appeared on the annotated "uses" statement a few lines down, saying that the grouping referenced on this line, which is defined just before this, now doesn't exist ("Grouping 'machine-def' not found").

I then reverted my change by pressing backspace again and entering "1", then adding an additional space after the "21", and then deleting the space I just entered. I then saved the buffer. At that point, the red marker went away. This last sequence seems very contrived, but I actually tried several other ways to revert the change, and most of them didn't remove the red marker.

I was also able to do variations which left the "22", but removed the red marker. This always included the step of adding the extra space, and then removing it.