1 files changed, 17 insertions, 0 deletions
diff --git a/bugs-fixed/ofs-rebuild.awk b/bugs-fixed/ofs-rebuild.awk
new file mode 100644
index 0000000000000..dd2700031524f
--- /dev/null
+++ b/bugs-fixed/ofs-rebuild.awk
@@ -0,0 +1,17 @@
+# The bug here is that nawk should use the value of OFS that
+# was current when $0 became invalid to rebuild the record.
+
+BEGIN {
+	OFS = ":"
+	$0 = "a b c d e f g"
+	$3 = "3333"
+	# Conceptually, $0 should now be "a:b:3333:d:e:f:g"
+
+	# Change OFS after (conceptually) rebuilding the record
+	OFS = "<>"
+
+	# Unmodifed nawk prints "a<>b<>3333<>d<>e<>f<>g" because
+	# it delays rebuilding $0 until it's needed, and then it uses
+	# the current value of OFS. Oops.
+	print
+}