On 22/11/2019 18:59, Jonathan Wakely wrote:
On 22/11/19 18:38 +0100, François Dumont wrote:
I noticed that we are not checking that iterators are not
singular in valid_range. Moreover __check_singular signature
for pointers is not intercepting all kind of pointers in terms
of qualification.
I'd like to commit it next week but considering we are in
stage 3 I need proper acceptance.
* include/debug/functions.h: Remove <bits/move.h> include.
(__check_singular_aux, __check_singular): Move...
* include/debug/helper_functions.h:
(__check_singular_aux, __check_singular): ...here.
(__valid_range_aux): Adapt to use latter.
* testsuite/25_algorithms/copy/debug/2_neg.cc: New.
Tested under Linux x86_64 normal and debug modes.
OK for trunk, thanks.
The curly braces...
diff --git a/libstdc++-v3/include/debug/helper_functions.h
b/libstdc++-v3/include/debug/helper_functions.h
index c3e7478f649..5a858754875 100644
--- a/libstdc++-v3/include/debug/helper_functions.h
+++ b/libstdc++-v3/include/debug/helper_functions.h
[...]
@@ -138,14 +156,23 @@ namespace __gnu_debug
inline bool
__valid_range_aux(_InputIterator __first, _InputIterator __last,
std::input_iterator_tag)
- { return true; }
+ {
+ if (__first != __last)
+ return !__check_singular(__first) && !__check_singular(__last);
+
+ return true;
+ }
template<typename _InputIterator>
_GLIBCXX_CONSTEXPR
inline bool
__valid_range_aux(_InputIterator __first, _InputIterator __last,
std::random_access_iterator_tag)
- { return __first <= __last; }
+ {
+ return
+ __valid_range_aux(__first, __last, std::input_iterator_tag{})
...^^^ here...
+ && __first <= __last;
+ }
/** We have iterators, so figure out what kind of iterators they are
* to see if we can check the range ahead of time.
@@ -167,6 +194,9 @@ namespace __gnu_debug
typename _Distance_traits<_InputIterator>::__type&
__dist,
std::__false_type)
{
+ if (!__valid_range_aux(__first, __last,
std::input_iterator_tag{}))
...and ^^^ here are not allowed pre C++11. Replacing those with
std::input_iterator_tag()
should fix it.