1 files changed, 11 insertions, 0 deletions
diff --git a/spec/bundler/lock/git_spec.rb b/spec/bundler/lock/git_spec.rb
index 28d167b773..df9d71fdd6 100644
--- a/spec/bundler/lock/git_spec.rb
+++ b/spec/bundler/lock/git_spec.rb
@@ -22,6 +22,17 @@ RSpec.describe "bundle lock with git gems" do
     expect(err).to be_empty
   end
 
+  it "prints a proper error when changing a locked Gemfile to point to a bad branch" do
+    gemfile <<-G
+      source "#{file_uri_for(gem_repo1)}"
+      gem 'foo', :git => "#{lib_path("foo-1.0")}", :branch => "bad"
+    G
+
+    bundle "lock --update foo", :raise_on_error => false
+
+    expect(err).to include("Revision bad does not exist in the repository")
+  end
+
   it "locks a git source to the current ref" do
     update_git "foo"
     bundle :install