get error when reply.as_string() ,macos 10.15 compile by bazel

[dxq174510447]

Describe the bug
A clear and concise description of what the bug is.
i use bazel compile my project. below is my code

       cpp_redis::client client;

	client.connect("127.0.0.1", 6379);
	client.auth("123456");

	std::future<cpp_redis::reply> r2= client.get("hello");
	client.sync_commit();
	if(r2.get().is_null()){
		cout << "null" << endl;
	}
	else{
		cout << "123" << endl;
		cout << r2.get().as_string()<< endl;
		cout << "456" << endl;
	}

WORKSPACE

http_archive(
    name = "redis",
    strip_prefix = "cpp_redis-master",
    url = "https://github.com/cpp-redis/cpp_redis/archive/master.zip",
)

load("@redis//:repositories.bzl", "cpp_redis_repositories")

cpp_redis_repositories()

BUILD

cc_binary(
    name = "wasm",
    srcs = ["seclang.cpp"],
    deps = [
    	"@redis//:cpp_redis",
    	":t1"
    	
    ],
    visibility = ["//visibility:public"]
)

cc_library(
    name = "t1",
    srcs = ["ttt/t1.cpp"],
    hdrs = ["ttt/t1.h"]
)

build

bazel build -s //src:wasm

In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/core/reply.hpp:29:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/misc/optional.hpp:39:
bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/misc/logger.hpp:135:3: warning: explicitly defaulted copy constructor is implicitly deleted [-Wdefaulted-function-deleted]
  logger(const logger&) = default;
  ^
bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/misc/logger.hpp:194:14: note: copy constructor of 'logger' is implicitly deleted because field 'm_mutex' has a deleted copy constructor
  std::mutex m_mutex;
             ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__mutex_base:40:5: note: 'mutex' has been explicitly marked deleted here
    mutex(const mutex&) = delete;
    ^
In file included from src/seclang.cpp:11:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/cpp_redis:30:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/core/client.hpp:36:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/core/types.hpp:31:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/core/reply.hpp:29:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/misc/optional.hpp:39:
bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/misc/logger.hpp:140:11: warning: explicitly defaulted copy assignment operator is implicitly deleted [-Wdefaulted-function-deleted]
  logger& operator=(const logger&) = default;
          ^
bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/misc/logger.hpp:194:14: note: copy assignment operator of 'logger' is implicitly deleted because field 'm_mutex' has a deleted copy assignment operator
  std::mutex m_mutex;
             ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__mutex_base:41:12: note: 'operator=' has been explicitly marked deleted here
    mutex& operator=(const mutex&) = delete;
           ^
In file included from src/seclang.cpp:11:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/cpp_redis:41:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/network/tcp_client.hpp:28:
In file included from bazel-out/darwin-fastbuild/bin/external/tacopie/_virtual_includes/tacopie/tacopie/tacopie:30:
In file included from bazel-out/darwin-fastbuild/bin/external/tacopie/_virtual_includes/tacopie/tacopie/utils/error.hpp:29:
bazel-out/darwin-fastbuild/bin/external/tacopie/_virtual_includes/tacopie/tacopie/utils/logger.hpp:107:3: warning: explicitly defaulted copy constructor is implicitly deleted [-Wdefaulted-function-deleted]
  logger(const logger&) = default;
  ^
bazel-out/darwin-fastbuild/bin/external/tacopie/_virtual_includes/tacopie/tacopie/utils/logger.hpp:157:14: note: copy constructor of 'logger' is implicitly deleted because field 'm_mutex' has a deleted copy constructor
  std::mutex m_mutex;
             ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__mutex_base:40:5: note: 'mutex' has been explicitly marked deleted here
    mutex(const mutex&) = delete;
    ^
In file included from src/seclang.cpp:11:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/cpp_redis:41:
In file included from bazel-out/darwin-fastbuild/bin/external/redis/_virtual_includes/cpp_redis/cpp_redis/network/tcp_client.hpp:28:
In file included from bazel-out/darwin-fastbuild/bin/external/tacopie/_virtual_includes/tacopie/tacopie/tacopie:30:
In file included from bazel-out/darwin-fastbuild/bin/external/tacopie/_virtual_includes/tacopie/tacopie/utils/error.hpp:29:
bazel-out/darwin-fastbuild/bin/external/tacopie/_virtual_includes/tacopie/tacopie/utils/logger.hpp:109:11: warning: explicitly defaulted copy assignment operator is implicitly deleted [-Wdefaulted-function-deleted]
  logger& operator=(const logger&) = default;
          ^
bazel-out/darwin-fastbuild/bin/external/tacopie/_virtual_includes/tacopie/tacopie/utils/logger.hpp:157:14: note: copy assignment operator of 'logger' is implicitly deleted because field 'm_mutex' has a deleted copy assignment operator
  std::mutex m_mutex;
             ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__mutex_base:41:12: note: 'operator=' has been explicitly marked deleted here
    mutex& operator=(const mutex&) = delete;
           ^
4 warnings generated.
Target //src:wasm up-to-date:
  bazel-bin/src/wasm
INFO: Elapsed time: 0.881s, Critical Path: 0.81s
INFO: 2 processes: 1 internal, 1 darwin-sandbox.
INFO: Build completed successfully, 2 total actions

run

dengxiaoqian@dengxiaoqiandeMacBook-Pro ctgw_wasm % bazel run -s //src:wasm
DEBUG: Rule 'redis' indicated that a canonical reproducible form can be obtained by modifying arguments sha256 = "666243fefb1465c0f9e6cd7fba0eab099e8aa7469674fecfc246f572705543ab"
DEBUG: Repository redis instantiated at:
  no stack (--record_rule_instantiation_callstack not enabled)
Repository rule http_archive defined at:
  /private/var/tmp/_bazel_dengxiaoqian/52cacb9c84a09b383e18d0ecdbf561f4/external/bazel_tools/tools/build_defs/repo/http.bzl:336:31: in <toplevel>
INFO: Analyzed target //src:wasm (0 packages loaded, 0 targets configured).
INFO: Found 1 target...
Target //src:wasm up-to-date:
  bazel-bin/src/wasm
INFO: Elapsed time: 0.077s, Critical Path: 0.00s
INFO: 1 process: 1 internal.
INFO: Build completed successfully, 1 total action
INFO: Build completed successfully, 1 total action
!!!Hello World111!!!
123

console not print the value of 'hello' and '456'

what cause the problem?

[dxq174510447]

i replace redis library using redis-plus-plus ,it is ok

[ParticleG]

You use get() function on the same future object twice, which is not allowed.

        cpp_redis::client client;

	client.connect("127.0.0.1", 6379);
	client.auth("123456");

	std::future<cpp_redis::reply> r2= client.get("hello");
	client.sync_commit();
	if(r2.get().is_null()){  /*Here*/
		cout << "null" << endl;
	}
	else{
		cout << "123" << endl;
		cout << r2.get().as_string()<< endl;    /*And here*/
		cout << "456" << endl;
	}

Consider use temporary variable like this:

        cpp_redis::client client;

	client.connect("127.0.0.1", 6379);
	client.auth("123456");

	std::future<cpp_redis::reply> r2= client.get("hello");
	client.sync_commit();
	auto r2_result = r2.get();
	if(r2_result.is_null()){
		cout << "null" << endl;
	}
	else{
		cout << "123" << endl;
		cout << r2_result.as_string()<< endl;
		cout << "456" << endl;
	}