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-rw-r--r--lib/open3.pl2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/open3.pl b/lib/open3.pl
index 9a387eb9a0..9f4d5a40a4 100644
--- a/lib/open3.pl
+++ b/lib/open3.pl
@@ -1,3 +1,5 @@
+warn "Legacy library @{[(caller(0))[6]]} will be removed from the Perl core distribution in the next major release. Please install it from the CPAN distribution Perl4::CoreLibs. It is being used at @{[(caller)[1]]}, line @{[(caller)[2]]}.\n";
+
# This legacy library is deprecated and will be removed in a future
# release of perl.
#