main: Stringify project name in error_info

If a project can't be removed from checkout due to uncommitted changes
present, error.project is type of Project and not a string (as it is in
some cases). Project is not JSON serializable, resulting in exception
within exception handler:

TypeError: Object of type Project is not JSON serializable

This change casts project to string as a defensive mechanism. It also
passes project name instead of project object.

Change-Id: Ie7b782d73dc3647975755d5a3774d16ea6cd5348
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/413877
Tested-by: Josip Sokcevic <sokcevic@google.com>
Reviewed-by: Gavin Mak <gavinmak@google.com>
Commit-Queue: Josip Sokcevic <sokcevic@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/project.py b/project.py
index 2ba2b766..7d6b6cea 100644
--- a/project.py
+++ b/project.py
@@ -1813,11 +1813,11 @@ class Project:
                 )
             else:
                 msg = (
-                    "error: %s: Cannot remove project: uncommitted"
+                    "error: %s: Cannot remove project: uncommitted "
                     "changes are present.\n" % self.RelPath(local=False)
                 )
                 logger.error(msg)
-                raise DeleteDirtyWorktreeError(msg, project=self)
+                raise DeleteDirtyWorktreeError(msg, project=self.name)
 
         if verbose:
             print(f"{self.RelPath(local=False)}: Deleting obsolete checkout.")