fix: restore better error message

which is covered by a test case.

broken by:
445eea13d987b345535fd4fa56486ff334bbd351

1 files changed, 3 insertions, 1 deletions

diff --git a/src/sub_commands/send.rs b/src/sub_commands/send.rs
index 62c6a04..16f10c4 100644
--- a/src/sub_commands/send.rs
+++ b/src/sub_commands/send.rs
@@ -51,7 +51,9 @@ pub async fn launch(cli_args: &Cli, args: &SubCommandArgs) -> Result<()> {
             || args.since_or_revision_range.eq("master..HEAD")
         {
             let branch_name = git_repo.get_checked_out_branch_name()?;
-            let (main_branch_name, main_tip) = git_repo.get_main_or_master_branch()?;
+            let (main_branch_name, main_tip) = git_repo
+                .get_main_or_master_branch()
+                .context("the default branches (main or master) do not exist")?;
             if branch_name.eq(main_branch_name) {
                 println!("creating 1 patch from latest commit");
                 vec![main_tip]