bryancall opened a new issue, #8848:
URL: https://github.com/apache/trafficserver/issues/8848
I get this error with gcc 12.1.1 on Fedora 36. I am able to get around this
issue if I make this modification to catch.hpp:
Patch:
```
+#pragma GCC diagnostic error "-Wmaybe-uninitialized"
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#include <functional>
+#pragma GCC diagnostic pop
+#pragma GCC diagnostic pop
```
Compiler error:
```
CXX unit_tests/freelist_benchmark-freelist_benchmark.o
In file included from /usr/include/c++/12/functional:59,
from
/home/bcall/dev/apache/trafficserver/build-Linux_gcc/../tests/include/catch.hpp:3483,
from
../../../src/tscore/unit_tests/freelist_benchmark.cc:25:
In constructor ‘std::function<_Res(_ArgTypes
...)>::function(std::function<_Res(_ArgTypes ...)>&&) [with _Res = bool;
_ArgTypes = {char}]’,
inlined from
‘std::__detail::_State<_Char_type>::_State(std::__detail::_State<_Char_type>&&)
[with _Char_type = char]’ at /usr/include/c++/12/bits/regex_automaton.h:149:4,
inlined from
‘std::__detail::_State<_Char_type>::_State(std::__detail::_State<_Char_type>&&)
[with _Char_type = char]’ at /usr/include/c++/12/bits/regex_automaton.h:146:7,
inlined from ‘std::__detail::_StateIdT
std::__detail::_NFA<_TraitsT>::_M_insert_subexpr_end() [with _TraitsT =
std::__cxx11::regex_traits<char>]’ at
/usr/include/c++/12/bits/regex_automaton.h:290:24:
/usr/include/c++/12/bits/std_function.h:405:42: error:
‘*(std::function<bool(char)>*)((char*)&__tmp + offsetof(std::__detail::_StateT,
std::__detail::_State<char>::<unnamed>.std::__detail::_State_base::<unnamed>)).std::function<bool(char)>::_M_invoker’
may be used uninitialized [-Werror=maybe-uninitialized]
405 | : _Function_base(), _M_invoker(__x._M_invoker)
| ~~~~^~~~~~~~~~
In file included from /usr/include/c++/12/regex:63,
from
/home/bcall/dev/apache/trafficserver/build-Linux_gcc/../tests/include/catch.hpp:11706:
/usr/include/c++/12/bits/regex_automaton.h: In member function
‘std::__detail::_StateIdT
std::__detail::_NFA<_TraitsT>::_M_insert_subexpr_end() [with _TraitsT =
std::__cxx11::regex_traits<char>]’:
/usr/include/c++/12/bits/regex_automaton.h:287:17: note: ‘__tmp’ declared
here
287 | _StateT __tmp(_S_opcode_subexpr_end);
| ^~~~~
In member function ‘bool std::_Function_base::_M_empty() const’,
inlined from ‘std::function<_Res(_ArgTypes ...)>::operator bool() const
[with _Res = bool; _ArgTypes = {char}]’ at
/usr/include/c++/12/bits/std_function.h:574:25,
inlined from ‘std::function<_Res(_ArgTypes
...)>::function(std::function<_Res(_ArgTypes ...)>&&) [with _Res = bool;
_ArgTypes = {char}]’ at /usr/include/c++/12/bits/std_function.h:407:6,
inlined from
‘std::__detail::_State<_Char_type>::_State(std::__detail::_State<_Char_type>&&)
[with _Char_type = char]’ at /usr/include/c++/12/bits/regex_automaton.h:149:4,
inlined from
‘std::__detail::_State<_Char_type>::_State(std::__detail::_State<_Char_type>&&)
[with _Char_type = char]’ at /usr/include/c++/12/bits/regex_automaton.h:146:7,
inlined from ‘std::__detail::_StateIdT
std::__detail::_NFA<_TraitsT>::_M_insert_subexpr_end() [with _TraitsT =
std::__cxx11::regex_traits<char>]’ at
/usr/include/c++/12/bits/regex_automaton.h:290:24:
/usr/include/c++/12/bits/std_function.h:247:37: error: ‘*(const
std::_Function_base*)((char*)&__tmp + offsetof(std::__detail::_StateT,
std::__detail::_State<char>::<unnamed>.std::__detail::_State_base::<unnamed>)).std::_Function_base::_M_manager’
may be used uninitialized [-Werror=maybe-uninitialized]
247 | bool _M_empty() const { return !_M_manager; }
| ^~~~~~~~~~
/usr/include/c++/12/bits/regex_automaton.h: In member function
‘std::__detail::_StateIdT
std::__detail::_NFA<_TraitsT>::_M_insert_subexpr_end() [with _TraitsT =
std::__cxx11::regex_traits<char>]’:
/usr/include/c++/12/bits/regex_automaton.h:287:17: note: ‘__tmp’ declared
here
287 | _StateT __tmp(_S_opcode_subexpr_end);
| ^~~~~
cc1plus: all warnings being treated as errors
```
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