PKGBUILDs/community/percona-server/gcc-11.patch

diff --git a/components/mysqlbackup/backup_page_tracker.h b/components/mysqlbackup/backup_page_tracker.h
index a0898a251f84..1d072a5104d3 100644
--- a/components/mysqlbackup/backup_page_tracker.h
+++ b/components/mysqlbackup/backup_page_tracker.h
@@ -28,6 +28,7 @@
 
 #include <mysql/components/services/page_track_service.h>
 
+#include <stddef.h>  // size_t
 #include <list>
 
 #include "mysqlbackup.h"
diff --git a/extra/robin-hood-hashing/robin_hood.h b/extra/robin-hood-hashing/robin_hood.h
index 34ba81bf8736..596f123beb98 100644
--- a/extra/robin-hood-hashing/robin_hood.h
+++ b/extra/robin-hood-hashing/robin_hood.h
@@ -43,6 +43,7 @@
 #include <cstdlib>
 #include <cstring>
 #include <functional>
+#include <limits>  // std::numeric_limits
 #include <memory> // only to support hash of smart pointers
 #include <stdexcept>
 #include <string>
diff --git a/include/my_alloc.h b/include/my_alloc.h
index a1bd1f278abb..942f3cf0786f 100644
--- a/include/my_alloc.h
+++ b/include/my_alloc.h
@@ -32,6 +32,7 @@
 
 #include <string.h>
 
+#include <cstdint>  // std::uintptr_t
 #include <memory>
 #include <new>
 #include <type_traits>
diff --git a/include/mysql/components/services/page_track_service.h b/include/mysql/components/services/page_track_service.h
index 103b51351868..3090daa332cc 100644
--- a/include/mysql/components/services/page_track_service.h
+++ b/include/mysql/components/services/page_track_service.h
@@ -27,6 +27,7 @@
 #include <mysql/components/service.h>
 #include <functional>
 
+#include <stddef.h>  // size_t
 #include <stdint.h>
 
 #ifdef __cplusplus
diff --git a/mysys/thr_lock.cc b/mysys/thr_lock.cc
index 404e32024ed3..662f34086d68 100644
--- a/mysys/thr_lock.cc
+++ b/mysys/thr_lock.cc
@@ -1198,6 +1198,7 @@ static void *test_thread(void *arg) {
   THR_LOCK_DATA *multi_locks[MAX_LOCK_COUNT];
   my_thread_id id;
   mysql_cond_t COND_thr_lock;
+  memset(&COND_thr_lock, 0, sizeof(COND_thr_lock));
 
   id = param + 1; /* Main thread uses value 0. */
   mysql_cond_init(0, &COND_thr_lock);
diff --git a/router/src/harness/src/stdx/filesystem.cc b/router/src/harness/src/stdx/filesystem.cc
index d800d4635379..d1f352a6f210 100644
--- a/router/src/harness/src/stdx/filesystem.cc
+++ b/router/src/harness/src/stdx/filesystem.cc
@@ -92,7 +92,7 @@ stdx::expected<std::string, std::error_code> getcwd() {
     return stdx::make_unexpected(last_posix_error_code());
   }
 #else
-  std::array<char, PATH_MAX> cwd;
+  std::array<char, PATH_MAX> cwd{};
   if (nullptr == ::getcwd(cwd.data(), cwd.size())) {
     return stdx::make_unexpected(last_error_code());
   }
diff --git a/router/src/harness/tests/plugins/lifecycle.cc b/router/src/harness/tests/plugins/lifecycle.cc
index 115b05804ecc..d2760d4c3422 100644
--- a/router/src/harness/tests/plugins/lifecycle.cc
+++ b/router/src/harness/tests/plugins/lifecycle.cc
@@ -195,7 +195,7 @@ void init_exit_strategies(const mysql_harness::ConfigSection *section) {
   // clang-format on
 
   // process configuration
-  for (const std::string &func : {"init", "start", "stop", "deinit"}) {
+  for (const std::string func : {"init", "start", "stop", "deinit"}) {
     if (section->has(func)) {
       const std::string &line = section->get(func);
 
@@ -449,7 +449,7 @@ LIFECYCLE_API void lifecycle_init(int flags) {
     std::lock_guard<std::mutex> lock(g_strategies_mtx);
     g_strategies.clear();
 
-    for (const std::string &key : {"instance1", "instance2", "instance3"}) {
+    for (const std::string key : {"instance1", "instance2", "instance3"}) {
       g_strategies[key].strategy_set = false;  // optimisation,
     }                                          // doesn't affect behavior
   }
diff --git a/router/src/harness/tests/test_net_ts_impl_resolver.cc b/router/src/harness/tests/test_net_ts_impl_resolver.cc
index 3f28f2688e43..e5007b21671e 100644
--- a/router/src/harness/tests/test_net_ts_impl_resolver.cc
+++ b/router/src/harness/tests/test_net_ts_impl_resolver.cc
@@ -80,15 +80,15 @@ TEST(NetTS_impl_resolver, gethostname_buffer_too_short) {
 }
 
 TEST(NetTS_impl_resolver, gethostname) {
-  std::array<char, 255> name;
+  std::array<char, 255> name{};
   const auto res = net::impl::resolver::gethostname(name.data(), name.size());
 
   EXPECT_THAT(res, ::testing::Truly([](auto v) { return bool(v); }));
 }
 
 TEST(NetTS_impl_resolver, getnameinfo) {
-  std::array<char, NI_MAXHOST> name;
-  std::array<char, NI_MAXSERV> serv;
+  std::array<char, NI_MAXHOST> name{};
+  std::array<char, NI_MAXSERV> serv{};
   struct sockaddr_in saddr {};
 
   saddr.sin_family = AF_INET;
@@ -101,8 +101,8 @@ TEST(NetTS_impl_resolver, getnameinfo) {
 }
 
 TEST(NetTS_impl_resolver, getnameinfo_invalid_sockaddr_size) {
-  std::array<char, NI_MAXHOST> name;
-  std::array<char, NI_MAXSERV> serv;
+  std::array<char, NI_MAXHOST> name{};
+  std::array<char, NI_MAXSERV> serv{};
   struct sockaddr_in saddr {};
 
   saddr.sin_family = AF_INET;
@@ -132,8 +132,8 @@ TEST(NetTS_impl_resolver, getnameinfo_invalid_sockaddr_size) {
 // windows doesn't check for bad-flags, but returns ERROR_INSUFFICIENT_BUFFER
 // freebsd, macosx doesn't check for bad-flags, but returns EAI_NONAME
 TEST(NetTS_impl_resolver, getnameinfo_badflags) {
-  std::array<char, NI_MAXHOST> name;
-  std::array<char, NI_MAXSERV> serv;
+  std::array<char, NI_MAXHOST> name{};
+  std::array<char, NI_MAXSERV> serv{};
   struct sockaddr_in saddr {};
 
   saddr.sin_family = AF_INET;
@@ -150,7 +150,7 @@ TEST(NetTS_impl_resolver, getnameinfo_badflags) {
 #endif
 
 TEST(NetTS_impl_resolver, getnameinfo_overflow) {
-  std::array<char, 1> name;  // buffer too small to resolve the address
+  std::array<char, 1> name{};  // buffer too small to resolve the address
   struct sockaddr_in saddr {};
 
   saddr.sin_family = AF_INET;
@@ -295,7 +295,7 @@ TEST(NetTS_impl_resolver, inetntop_nospace) {
 
   saddr.sin_family = AF_INET;
 
-  std::array<char, 1> name;
+  std::array<char, 1> name{};
 
   const auto res =
       net::impl::resolver::inetntop(AF_INET, &saddr, name.data(), name.size());
@@ -319,7 +319,7 @@ TEST(NetTS_impl_resolver, inetntop_nospace) {
 TEST(NetTS_impl_resolver, inetntop_ipv4) {
   struct in_addr addr {};
 
-  std::array<char, INET_ADDRSTRLEN> name;
+  std::array<char, INET_ADDRSTRLEN> name{};
 
   const auto res =
       net::impl::resolver::inetntop(AF_INET, &addr, name.data(), name.size());
@@ -331,7 +331,7 @@ TEST(NetTS_impl_resolver, inetntop_ipv4) {
 TEST(NetTS_impl_resolver, inetntop_ipv6) {
   struct in6_addr addr {};
 
-  std::array<char, INET6_ADDRSTRLEN> name;
+  std::array<char, INET6_ADDRSTRLEN> name{};
 
   const auto res =
       net::impl::resolver::inetntop(AF_INET6, &addr, name.data(), name.size());
@@ -343,7 +343,7 @@ TEST(NetTS_impl_resolver, inetntop_ipv6) {
 TEST(NetTS_impl_resolver, inetntop_fail_invalid_protocol) {
   struct in6_addr addr {};
 
-  std::array<char, INET6_ADDRSTRLEN> name;
+  std::array<char, INET6_ADDRSTRLEN> name{};
 
   const auto res =
       net::impl::resolver::inetntop(AF_UNIX, &addr, name.data(), name.size());
@@ -355,7 +355,7 @@ TEST(NetTS_impl_resolver, inetntop_fail_invalid_protocol) {
 TEST(NetTS_impl_resolver, inetntop_fail_empty_buffer) {
   struct in6_addr addr {};
 
-  std::array<char, INET6_ADDRSTRLEN> name;
+  std::array<char, INET6_ADDRSTRLEN> name{};
 
   const auto res =
       net::impl::resolver::inetntop(AF_INET6, &addr, name.data(), 0);
diff --git a/router/tests/component/test_bootstrap_account.cc b/router/tests/component/test_bootstrap_account.cc
index c475e1429f97..ee57ecddfde3 100644
--- a/router/tests/component/test_bootstrap_account.cc
+++ b/router/tests/component/test_bootstrap_account.cc
@@ -3971,7 +3971,7 @@ TEST_F(UndoCreateUserTest, failure_after_account_creation) {
   // induce failure at config-write step (should result in error analogous to:
   // "Could not create file '.../router-sBHJGw/mysqlrouter.conf.bak': Permission
   // denied"
-  for (const std::string &file : {"mysqlrouter.conf", "mysqlrouter.conf.bak"}) {
+  for (const std::string file : {"mysqlrouter.conf", "mysqlrouter.conf.bak"}) {
     std::string path = bootstrap_directory.name() + "/" + file;
     std::ofstream f(path.c_str());
     f << "[DEFAULT]\n";
@@ -4082,7 +4082,7 @@ TEST_F(UndoCreateUserTest,
   // induce failure at config-write step (should result in error analogous to:
   // "Could not create file '.../router-sBHJGw/mysqlrouter.conf.bak': Permission
   // denied"
-  for (const std::string &file : {"mysqlrouter.conf", "mysqlrouter.conf.bak"}) {
+  for (const std::string file : {"mysqlrouter.conf", "mysqlrouter.conf.bak"}) {
     std::string path = bootstrap_directory.name() + "/" + file;
     std::ofstream f(path.c_str());
     f << "[DEFAULT]\n";
diff --git a/sql-common/sql_string.cc b/sql-common/sql_string.cc
index 40435729421f..44511304e80f 100644
--- a/sql-common/sql_string.cc
+++ b/sql-common/sql_string.cc
@@ -23,6 +23,7 @@
 #include "sql_string.h"
 
 #include <algorithm>
+#include <limits>  // std::numeric_limits
 
 #include "my_dbug.h"
 #include "my_macros.h"
diff --git a/sql/CMakeLists.txt b/sql/CMakeLists.txt
index 27dfdd8c825a..30590fb9cc64 100644
--- a/sql/CMakeLists.txt
+++ b/sql/CMakeLists.txt
@@ -870,6 +870,13 @@ IF(SOLARIS AND MY_COMPILER_IS_GNU AND
     )
 ENDIF()
 
+# Suppress warnings for gcc-11 or newer
+IF(CMAKE_COMPILER_IS_GNUCXX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 11)
+  ADD_CXX_COMPILE_FLAGS_TO_FILES(-Wno-mismatched-new-delete FILES sql_cursor.cc sql_prepare.cc)
+  # a false positive with a bison-generated file (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98753)
+  ADD_CXX_COMPILE_FLAGS_TO_FILES(-Wno-free-nonheap-object FILES ${CMAKE_CURRENT_BINARY_DIR}/sql_hints.yy.cc)
+ENDIF()
+
 ADD_LIBRARY(sql_dd STATIC ${DD_SOURCES})
 ADD_DEPENDENCIES(sql_dd GenFixPrivs)
 ADD_DEPENDENCIES(sql_dd GenServerSource)
diff --git a/sql/item_geofunc_internal.cc b/sql/item_geofunc_internal.cc
index 29384b48edd9..de426d3789ce 100644
--- a/sql/item_geofunc_internal.cc
+++ b/sql/item_geofunc_internal.cc
@@ -111,8 +111,7 @@ template <typename Coordsys>
 void BG_geometry_collection::merge_components(bool *pnull_value) {
   if (is_comp_no_overlapped()) return;
 
-  POS pos;
-  Item_func_st_union ifsu(pos, nullptr, nullptr);
+  Item_func_st_union ifsu(POS(), nullptr, nullptr);
   bool do_again = true;
   uint32 last_composition[6] = {0}, num_unchanged_composition = 0;
   size_t last_num_geos = 0;
diff --git a/sql/memory/unique_ptr.h b/sql/memory/unique_ptr.h
index 7997834d6ec6..a30585008de0 100644
--- a/sql/memory/unique_ptr.h
+++ b/sql/memory/unique_ptr.h
@@ -28,6 +28,7 @@
 #include <algorithm>
 #include <cstddef>
 #include <iostream>
+#include <limits>  // std::numeric_limits
 #include <memory>
 #include <string>
 #include <tuple>
diff --git a/sql/opt_range.cc b/sql/opt_range.cc
index f1167ef9ef2f..0af19bc8cc15 100644
--- a/sql/opt_range.cc
+++ b/sql/opt_range.cc
@@ -15560,7 +15560,7 @@ static void append_range_all_keyparts(Opt_trace_array *range_trace,
       range_string and the string becomes too long. Printing very long
       range conditions normally doesn't make sense either.
     */
-    if (!append_to_trace && range_string->length() > 500) {
+    if (!append_to_trace && range_string && range_string->length() > 500) {
       range_string->append(STRING_WITH_LEN("..."));
       break;
     }
@@ -15608,7 +15608,7 @@ static void append_range_all_keyparts(Opt_trace_array *range_trace,
       */
       if (append_to_trace)
         range_trace->add_utf8(range_so_far->ptr(), range_so_far->length());
-      else {
+      else if (range_string) {
         if (range_string->length() == 0)
           range_string->append(STRING_WITH_LEN("("));
         else
diff --git a/sql/server_component/mysql_query_attributes_imp.cc b/sql/server_component/mysql_query_attributes_imp.cc
index 14b2e65cb9c2..302d2016888a 100644
--- a/sql/server_component/mysql_query_attributes_imp.cc
+++ b/sql/server_component/mysql_query_attributes_imp.cc
@@ -274,7 +274,7 @@ static String *query_parameter_val_str(const PS_PARAM *param,
         str->length(
             my_TIME_to_str(tm, str->ptr(), uint8{DATETIME_MAX_DECIMALS}));
       } else {
-        delete str;
+        delete[] str;
         str = nullptr;
       }
       break;
@@ -300,7 +300,7 @@ static String *query_parameter_val_str(const PS_PARAM *param,
         str->length(
             my_TIME_to_str(tm, str->ptr(), uint8{DATETIME_MAX_DECIMALS}));
       } else {
-        delete str;
+        delete[] str;
         str = nullptr;
       }
       break;
@@ -342,7 +342,7 @@ static String *query_parameter_val_str(const PS_PARAM *param,
         str->length(
             my_TIME_to_str(tm, str->ptr(), uint8{DATETIME_MAX_DECIMALS}));
       } else {
-        delete str;
+        delete[] str;
         str = nullptr;
       }
       break;
@@ -355,7 +355,7 @@ static String *query_parameter_val_str(const PS_PARAM *param,
       uint dummy_errors;
       if (str->copy(reinterpret_cast<const char *>(param->value), param->length,
                     &my_charset_bin, &my_charset_bin, &dummy_errors)) {
-        delete str;
+        delete[] str;
         str = nullptr;
       }
       break;
@@ -368,7 +368,7 @@ static String *query_parameter_val_str(const PS_PARAM *param,
       uint dummy_errors;
       if (str->copy(reinterpret_cast<const char *>(param->value), param->length,
                     cs, cs, &dummy_errors)) {
-        delete str;
+        delete[] str;
         str = nullptr;
       }
       break;
diff --git a/storage/innobase/CMakeLists.txt b/storage/innobase/CMakeLists.txt
index b34a1bb97c8a..7cc7ad7e0f24 100644
--- a/storage/innobase/CMakeLists.txt
+++ b/storage/innobase/CMakeLists.txt
@@ -288,3 +288,10 @@ IF(HAS_WARN_FLAG)
   ADD_COMPILE_FLAGS(fts/fts0pars.cc
     COMPILE_FLAGS "${HAS_WARN_FLAG}")
 ENDIF()
+
+# Suppress warnings for gcc-11 or newer
+IF(CMAKE_COMPILER_IS_GNUCXX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 11)
+  ADD_CXX_COMPILE_FLAGS_TO_FILES(-Wno-maybe-uninitialized FILES os/os0file.cc)
+  # a false positive with a bison-generated file (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98753)
+  ADD_CXX_COMPILE_FLAGS_TO_FILES(-Wno-free-nonheap-object FILES pars/pars0grm.cc)
+ENDIF()
diff --git a/unittest/gunit/mock_create_field.h b/unittest/gunit/mock_create_field.h
index 16c87540b8fa..d9caad5b4ed5 100644
--- a/unittest/gunit/mock_create_field.h
+++ b/unittest/gunit/mock_create_field.h
@@ -40,6 +40,7 @@ class Mock_create_field : public Create_field {
     */
     DBUG_ASSERT(field_type == MYSQL_TYPE_TIMESTAMP ||
                 field_type == MYSQL_TYPE_TIMESTAMP2);
+    memset(&m_lex_string, 0, sizeof(m_lex_string));
     init(nullptr,  // THD *thd
          nullptr,  // char *fld_name
          field_type,
diff --git a/unittest/gunit/strings_utf8-t.cc b/unittest/gunit/strings_utf8-t.cc
index a863c7d1aa28..7e6e1b71b452 100644
--- a/unittest/gunit/strings_utf8-t.cc
+++ b/unittest/gunit/strings_utf8-t.cc
@@ -148,6 +148,7 @@ TEST_F(StringsUTF8Test, MyIsmbcharUtf8) {
 
   /* valid utf8 charaters, testing for boundry values */
   utf8_src[0] = '\x00';
+  utf8_src[1] = '\x00';
   EXPECT_EQ(0U, system_charset_info->cset->ismbchar(system_charset_info,
                                                     utf8_src, utf8_src + 1));
 
@@ -522,6 +523,7 @@ TEST_F(StringsUTF8mb4Test, MyIsmbcharUtf8mb4) {
 
   /* valid utf8mb4 charaters, testing for boundry values */
   utf8_src[0] = '\x00';
+  utf8_src[1] = '\x00';
   EXPECT_EQ(0U, system_charset_info->cset->ismbchar(system_charset_info,
                                                     utf8_src, utf8_src + 1));
   utf8_src[0] = '\x7f';