Avoid panic in stty #452

Job	Run time
L10n/Fluent Syntax Check	15s
L10n/Build and Test (ubuntu-latest, feat_os_unix)	2m 57s
L10n/Installation Test (Make & Cargo) (ubuntu-latest, feat_os_unix)	5m 57s
L10n/Installation Test (Make & Cargo) (macos-latest, feat_os_macos)	8m 43s
L10n/Clap Error Localization Test	48s
L10n/Build and Test (windows-latest, feat_os_windows)	4m 17s
L10n/Build and Test (macos-latest, feat_os_macos)	2m 47s
L10n/Locale Support Verification	8m 51s
L10n/French Integration Test	56s
L10n/Multi-call Binary Install Test (ubuntu-latest, feat_os_unix)	3m 59s
L10n/Multi-call Binary Install Test (macos-latest, feat_os_macos)	6m 21s
L10n/Locale Embedding Regression Test	2m 39s
	48m 30s

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