24 lines
710 B
Diff
24 lines
710 B
Diff
Index: node.c
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===================================================================
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RCS file: /sources/gawk/gawk-devel/node.c,v
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retrieving revision 1.3
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diff -u -r1.3 node.c
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--- node.c 6 May 2010 19:00:58 -0000 1.3
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+++ node.c 27 Oct 2010 17:56:49 -0000
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@@ -758,6 +758,15 @@
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assert((n->flags & (STRING|STRCUR)) != 0);
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+ /*
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+ * Don't convert global null string or global null field
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+ * variables to a wide string. They are both zero-length anyway.
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+ * This also avoids future double-free errors while releasing
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+ * shallow copies, eg. *tmp = *Null_field; free_wstr(tmp);
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+ */
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+ if (n == Nnull_string || n == Null_field)
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+ return n;
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+
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if ((n->flags & WSTRCUR) != 0) {
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if (ptr == NULL)
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return n;
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