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Fix crash in selftest::test_lexer_string_locations_ucn4 (PR bootstrap/72823)

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libcpp/ChangeLog:
	PR bootstrap/72823
	* charset.c (_cpp_valid_ucn): Replace overzealous assert with one
	that allows for char_range to be non-NULL when loc_reader is NULL.

From-SVN: r239211
This commit is contained in:
David Malcolm 2016-08-06 18:06:30 +00:00 • committed by David Malcolm
parent 851e6c6a8e
commit e7864d68ee
2 changed files with 11 additions and 6 deletions
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6
libcpp/ChangeLog
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@ -1,3 +1,9 @@
2016-08-06 David Malcolm <dmalcolm@redhat.com>
PR bootstrap/72823
* charset.c (_cpp_valid_ucn): Replace overzealous assert with one
that allows for char_range to be non-NULL when loc_reader is NULL.
2016-08-05 David Malcolm <dmalcolm@redhat.com>
* charset.c (cpp_substring_ranges::cpp_substring_ranges): New

11
libcpp/charset.c
View file

@ -1027,7 +1027,7 @@ ucn_valid_in_identifier (cpp_reader *pfile, cppchar_t c,
IDENTIFIER_POS is 0 when not in an identifier, 1 for the start of
an identifier, or 2 otherwise.
If CHAR_RANGE and LOC_READER are non-NULL, then position information is
If LOC_READER is non-NULL, then position information is
read from *LOC_READER and CHAR_RANGE->m_finish is updated accordingly. */
bool
@ -1042,10 +1042,6 @@ _cpp_valid_ucn (cpp_reader *pfile, const uchar **pstr,
const uchar *str = *pstr;
const uchar *base = str - 2;
/* char_range and loc_reader must either be both NULL, or both be
non-NULL. */
gcc_assert ((char_range != NULL) == (loc_reader != NULL));
if (!CPP_OPTION (pfile, cplusplus) && !CPP_OPTION (pfile, c99))
cpp_error (pfile, CPP_DL_WARNING,
"universal character names are only valid in C++ and C99");
@ -1076,7 +1072,10 @@ _cpp_valid_ucn (cpp_reader *pfile, const uchar **pstr,
break;
str++;
if (loc_reader)
char_range->m_finish = loc_reader->get_next ().m_finish;
{
gcc_assert (char_range);
char_range->m_finish = loc_reader->get_next ().m_finish;
}
result = (result << 4) + hex_value (c);
}
while (--length && str < limit);