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diff --git a/bin/1sh/tests/builtins/break5.4 b/bin/1sh/tests/builtins/break5.4
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+# $FreeBSD: releng/12.1/bin/sh/tests/builtins/break5.4 251180 2013-05-31 14:45:25Z jilles $
+
+# Although this is not specified by POSIX, some configure scripts (gawk 4.1.0)
+# appear to depend on it.
+# In some uncommitted code, the subshell environment corrupted the outer
+# shell environment's state.
+
+(for i in a b c; do
+	exit 3
+done)
+break
+exit 4