xcstringstool compile (and by extension CompileXCStrings in Xcode/Bazel builds) hangs indefinitely on .xcstrings files where one or more keys have a localizations entry count that is a significant outlier relative to the rest of the file's keys — even when total file size and total entry count are unremarkable. The tool produces no error, warning, exception, or log output; it simply spins at high CPU with flat memory until killed.