diff options
Diffstat (limited to 'libcpp/line-map.c')
| -rw-r--r-- | libcpp/line-map.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libcpp/line-map.c b/libcpp/line-map.c index ff679ed..0e30b4b 100644 --- a/libcpp/line-map.c +++ b/libcpp/line-map.c @@ -742,6 +742,10 @@ linemap_line_start (struct line_maps *set, linenum_type to_line, if (line_delta < 0 || last_line != ORDINARY_MAP_STARTING_LINE_NUMBER (map) || SOURCE_COLUMN (map, highest) >= (1U << (column_bits - range_bits)) + || ( /* We can't reuse the map if the line offset is sufficiently + large to cause overflow when computing location_t values. */ + (to_line - ORDINARY_MAP_STARTING_LINE_NUMBER (map)) + >= (1U << (CHAR_BIT * sizeof (linenum_type) - column_bits))) || range_bits < map->m_range_bits) map = linemap_check_ordinary (const_cast <line_map *> |