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MFC r258712;

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libcpp: fix an underflow.

Similar fix seen in Apple's gcc42.

Obtained from:	OpenBSD (Rev 1.2)
MFC after:	2 weeks
This commit is contained in:
pfg 2013-12-12 19:01:50 +00:00
parent 4bda5ad442
commit b8648b775a
1 changed files with 1 additions and 1 deletions
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2
contrib/gcclibs/libcpp/charset.c
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@ -1628,7 +1628,7 @@ _cpp_convert_input (cpp_reader *pfile, const char *input_charset,
terminate with another \r, not an \n, so that we do not mistake
the \r\n sequence for a single DOS line ending and erroneously
issue the "No newline at end of file" diagnostic. */
if (to.text[to.len - 1] == '\r')
if (to.len > 0 && to.text[to.len - 1] == '\r')
to.text[to.len] = '\r';
else
to.text[to.len] = '\n';