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--- TEA.xs.orig 2001-05-21 18:32:59.000000000 +0100
+++ TEA.xs 2017-04-19 16:35:13.541830200 +0100
@@ -54,9 +54,8 @@
if (output == &PL_sv_undef)
output = sv_newmortal();
outlen = 8;
-
- if (SvREADONLY(output) || !SvUPGRADE(output, SVt_PV))
- croak("cannot use output as lvalue");
+
+ if (!SvREADONLY(output)) SvUPGRADE(output, SVt_PV);
tea_crypt(self,
(unsigned char *)input,