[gnome-builder] vala-pack: avoid copying unsaved files from threads

[Christian Hergert <chergert src gnome org>]

commit 4c16af4d8e40e5608442bb418266c92683f52019
Author: Christian Hergert <chergert redhat com>
Date:   Sun Jan 14 19:12:26 2018 -0800

    vala-pack: avoid copying unsaved files from threads
    
    We want to access these from the main thread to get a snapshot of the
    modified buffers.

 src/plugins/vala-pack/ide-vala-completion-provider.vala |  5 ++++-
 src/plugins/vala-pack/ide-vala-index.vala               | 11 +++++++----
 2 files changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/src/plugins/vala-pack/ide-vala-completion-provider.vala 
b/src/plugins/vala-pack/ide-vala-completion-provider.vala
index 34afcb947..af685e887 100644
--- a/src/plugins/vala-pack/ide-vala-completion-provider.vala
+++ b/src/plugins/vala-pack/ide-vala-completion-provider.vala
@@ -80,6 +80,9 @@ namespace Ide
                        var index = service.index;
                        var unsaved_files = this._context.get_unsaved_files ();
 
+                       /* make a copy for threaded access */
+                       var unsaved_files_copy = unsaved_files.to_array ();
+
                        var cancellable = new GLib.Cancellable ();
                        context.cancelled.connect(() => {
                                cancellable.cancel ();
@@ -92,7 +95,7 @@ namespace Ide
                                                                    iter.get_line () + 1,
                                                                    iter.get_line_offset () + 1,
                                                                    line,
-                                                                   unsaved_files,
+                                                                   unsaved_files_copy,
                                                                    this,
                                                                    cancellable,
                                                                    out res_line,
diff --git a/src/plugins/vala-pack/ide-vala-index.vala b/src/plugins/vala-pack/ide-vala-index.vala
index 12af2bcbb..593d47aa0 100644
--- a/src/plugins/vala-pack/ide-vala-index.vala
+++ b/src/plugins/vala-pack/ide-vala-index.vala
@@ -304,7 +304,9 @@ namespace Ide
                                                var source_file = this.source_files[file];
                                                source_file.get_mapped_contents ();
 
-                                               this.apply_unsaved_files (unsaved_files_copy);
+                                               if (unsaved_files_copy != null)
+                                                       this.apply_unsaved_files (unsaved_files_copy);
+
                                                this.report.clear ();
                                                this.reparse ();
                                                if (this.report.get_errors () == 0 &&
@@ -328,20 +330,21 @@ namespace Ide
                                                            int line,
                                                            int column,
                                                            string? line_text,
-                                                           Ide.UnsavedFiles? unsaved_files,
+                                                           GLib.GenericArray<Ide.UnsavedFile>? unsaved_files,
                                                            Ide.ValaCompletionProvider provider,
                                                            GLib.Cancellable? cancellable,
                                                            out int result_line,
                                                            out int result_column)
                {
-                       var unsaved_files_copy = unsaved_files.to_array ();
                        var result = new Ide.CompletionResults (provider.query);
 
                        if ((cancellable == null) || !cancellable.is_cancelled ()) {
                                lock (this.code_context) {
                                        Vala.CodeContext.push (this.code_context);
 
-                                       this.apply_unsaved_files (unsaved_files_copy);
+                                       if (unsaved_files != null)
+                                               this.apply_unsaved_files (unsaved_files);
+
                                        this.report.clear ();
                                        this.reparse ();
                                        if (this.report.get_errors () == 0 &&