Merge branch '54656-500-error-on-save-of-general-pipeline-settings-timeout' into 'master'

Resolve "500 error on save of general pipeline settings timeout"

Closes gitlab-ee#11281

See merge request gitlab-org/gitlab-ce!27416

app/controllers/projects/settings/ci_cd_controller.rb

@@ -19,7 +19,7 @@ module Projects
 
             redirect_to project_settings_ci_cd_path(@project)
           else
-            render 'show'
+            redirect_to project_settings_ci_cd_path(@project), alert: result[:message]
           end
         end
       end

changelogs/unreleased/54656-500-error-on-save-of-general-pipeline-settings-timeout.yml

@@ -0,0 +1,5 @@
+---
+title: Fix 500 in general pipeline settings when passing an invalid build timeout.
+merge_request: 27416
+author:
+type: fixed

spec/controllers/projects/settings/ci_cd_controller_spec.rb

@@ -191,6 +191,15 @@ describe Projects::Settings::CiCdController do
           expect(project.build_timeout).to eq(5400)
         end
       end
+
+      context 'when build_timeout_human_readable is invalid' do
+        let(:params) { { build_timeout_human_readable: '5m' } }
+
+        it 'set specified timeout' do
+          expect(subject).to set_flash[:alert]
+          expect(response).to redirect_to(namespace_project_settings_ci_cd_path)
+        end
+      end
     end
   end
 end