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-rw-r--r--thrdvar.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/thrdvar.h b/thrdvar.h
index 6058642e47..db38d2f698 100644
--- a/thrdvar.h
+++ b/thrdvar.h
@@ -90,7 +90,7 @@ PERLVAR(Ttimesbuf, struct tms)
/* Fields used by magic variables such as $@, $/ and so on */
PERLVAR(Ttainted, bool) /* using variables controlled by $< */
PERLVAR(Tcurpm, PMOP *) /* what to do \ interps in REs from */
-PERLVAR(Tnrs, SV *) /* placeholder: unused since 5.8.0 (5.7.2 patch #12027 for bug ID 20010815.012) */
+PERLVAR(Tnrs, SV *) /* was placeholder: unused since 5.8.0 (5.7.2 patch #12027 for bug ID 20010815.012). Used to save rx->saved_copy */
/*
=for apidoc mn|SV*|PL_rs