### Bug Description If `snap pack` fails, the error message (which is often helpful in determining why it failed) is hidden unless you enable debug logging or look in the detailed log file. Instead, the error message shows the specific command that was run in the instance (which isn't particularly useful to the user). ### To Reproduce Run `snapcraft pack` with the provided `snapcraft.yaml`. ### Environment Kubuntu 23.04 ### snapcraft.yaml ```shell name: my-snap-name # you probably want to 'snapcraft register <name>' base: core22 # the base snap is the execution environment for this snap version: '0.1' # just for humans, typically '1.2+git' or '1.3.2' summary: Single-line elevator pitch for your amazing snap # 79 char long summary description: | This is my-snap's description. You have a paragraph or two to tell the most important story about your snap. Keep it under 100 words though, we live in tweetspace and your description wants to look good in the snap store. grade: devel # must be 'stable' to release into candidate/stable channels confinement: devmode # use 'strict' once you have the right plugs and slots apps: thing: command: this/file/does/not/exist parts: my-part: # See 'snapcraft plugins' plugin: nil ``` ### Relevant log output ```shell lengau@ratel:~/tmp$ snapcraft pack Launching instance... Executed: pull my-part Executed: build my-part Executed: stage my-part Executed: prime my-part Executed parts lifecycle Generated snap metadata Command '['snap', 'pack', '--filename', 'my-snap-name_0.1_amd64.snap', '--compression', 'xz', PosixPath('/root/prime'), PosixPath('/root/project')]' returned non-zero exit status 1. Failed to execute pack in instance. Recommended resolution: Run the same command again with --debug to shell into the environment if you wish to introspect this failure. Full execution log: '/home/lengau/.local/state/snapcraft/log/snapcraft-20231215-111314.031750.log' ``` ### Additional context _No response_