diff options
Diffstat (limited to 'libcxx/src')
| -rw-r--r-- | libcxx/src/locale.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libcxx/src/locale.cpp b/libcxx/src/locale.cpp index 00eb574ec45..ca0a1c9b15f 100644 --- a/libcxx/src/locale.cpp +++ b/libcxx/src/locale.cpp @@ -4379,7 +4379,9 @@ void __check_grouping(const string& __grouping, unsigned* __g, unsigned* __g_end, ios_base::iostate& __err) { - if (__grouping.size() != 0) +// if the grouping pattern is empty _or_ there are no grouping bits, then do nothing +// we always have at least a single entry in [__g, __g_end); the end of the input sequence + if (__grouping.size() >= 0 && __g_end - __g > 1) { reverse(__g, __g_end); const char* __ig = __grouping.data(); |
