Bug#974841: marked as done (ms-gsl: new clang test fails on s390x)

Wed, 16 Sep 2026 06:22:19 -0700 

Your message dated Wed, 16 Sep 2026 13:19:47 +0000
with message-id <[email protected]>
and subject line Bug#974841: fixed in ms-gsl 5.0.0-1
has caused the Debian Bug report #974841,
regarding ms-gsl: new clang test fails on s390x
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
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misconfiguration somewhere. Please contact [email protected]
immediately.)


-- 
974841: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=974841
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message --- 
Source: ms-gsl
Version: 3.1.0-3
Severity: serious

Hello, looks like the new clang tests are failing on s390x, I don't know why...

I can say that removing
"flags" (set flags= on line 13 of entry file) to make it behave in a similar 
way with gcc works to shut down the errors

https://autopkgtest.ubuntu.com/packages/m/ms-gsl/hirsute/s390x


unfortunately, after doing that, there is still a failure on s390x with clang-11

cd /home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl/tests && /usr/bin/clang++-11  
-I/home/locutusofborg/ms-gsl-3.1.0/include -isystem 
/home/locutusofborg/ms-gsl-3.1.0/tests/googletest/googletest/include -O3 
-DNDEBUG -fno-strict-aliasing -Wall -Wcast-align -Wconversion 
-Wctor-dtor-privacy -Werror -Wextra -Wpedantic -Wshadow -Wsign-conversion 
-Wno-deprecated-declarations -Weverything -Wno-c++98-compat 
-Wno-c++98-compat-pedantic -Wno-missing-braces -Wno-covered-switch-default 
-Wno-global-constructors -Wno-missing-prototypes -Wno-padded 
-Wno-unknown-attributes -Wno-used-but-marked-unused -Wno-weak-vtables 
-std=c++20 -o CMakeFiles/assertion_tests.dir/assertion_tests.cpp.o -c 
/home/locutusofborg/ms-gsl-3.1.0/tests/assertion_tests.cpp
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:146:86: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator<(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() < rhs.get())
                                                                                
     ^
                                                                                
     nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:363:34: note: while 
substituting deduced template arguments into function template 'operator<' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp1(sp1) < NotNullSp1(sp1)) == false);
                                 ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:146:86: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator<(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() < rhs.get())
                                                                                
     ^
                                                                                
     nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:364:34: note: while 
substituting deduced template arguments into function template 'operator<' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<const int>]
    EXPECT_TRUE((NotNullSp1(sp1) < NotNullSp2(sp2)) == (sp1 < sp2));
                                 ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:364:61: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
    EXPECT_TRUE((NotNullSp1(sp1) < NotNullSp2(sp2)) == (sp1 < sp2));
                                                            ^
                                                            nullptr

(full log attached)

Can you please have a look? this error might be a real error spotted by 
clang-11 (and maybe when optimization level is set to -O3? I don't honestly 
know)

thanks

Gianfranco

+ cmake -B pippo/googletest -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_C_COMPILER=true 
-DCMAKE_CXX_COMPILER=clang++-11 -DCMAKE_CXX_FLAGS= -DBUILD_GMOCK=OFF 
/usr/src/googletest
-- Configuring done
You have changed variables that require your cache to be deleted.
Configure will be re-run and you may have to reset some variables.
The following variables have changed:
CMAKE_CXX_COMPILER= clang++-11
CMAKE_CXX_COMPILER= clang++-11

-- The C compiler identification is GNU 10.2.0
-- The CXX compiler identification is Clang 11.0.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
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-DGSL_CXX_STANDARD=20
-- Configuring done
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/home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl
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 --color=
[ 91%] Building CXX object 
tests/CMakeFiles/notnull_tests.dir/notnull_tests.cpp.o
cd /home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl/tests && /usr/bin/clang++-11  
-I/home/locutusofborg/ms-gsl-3.1.0/include -isystem 
/home/locutusofborg/ms-gsl-3.1.0/tests/googletest/googletest/include -O3 
-DNDEBUG -fno-strict-aliasing -Wall -Wcast-align -Wconversion 
-Wctor-dtor-privacy -Werror -Wextra -Wpedantic -Wshadow -Wsign-conversion 
-Wno-deprecated-declarations -Weverything -Wno-c++98-compat 
-Wno-c++98-compat-pedantic -Wno-missing-braces -Wno-covered-switch-default 
-Wno-global-constructors -Wno-missing-prototypes -Wno-padded 
-Wno-unknown-attributes -Wno-used-but-marked-unused -Wno-weak-vtables 
-std=c++20 -o CMakeFiles/notnull_tests.dir/notnull_tests.cpp.o -c 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp
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[ 94%] Building CXX object 
tests/CMakeFiles/assertion_tests.dir/assertion_tests.cpp.o
cd /home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl/tests && /usr/bin/clang++-11  
-I/home/locutusofborg/ms-gsl-3.1.0/include -isystem 
/home/locutusofborg/ms-gsl-3.1.0/tests/googletest/googletest/include -O3 
-DNDEBUG -fno-strict-aliasing -Wall -Wcast-align -Wconversion 
-Wctor-dtor-privacy -Werror -Wextra -Wpedantic -Wshadow -Wsign-conversion 
-Wno-deprecated-declarations -Weverything -Wno-c++98-compat 
-Wno-c++98-compat-pedantic -Wno-missing-braces -Wno-covered-switch-default 
-Wno-global-constructors -Wno-missing-prototypes -Wno-padded 
-Wno-unknown-attributes -Wno-used-but-marked-unused -Wno-weak-vtables 
-std=c++20 -o CMakeFiles/assertion_tests.dir/assertion_tests.cpp.o -c 
/home/locutusofborg/ms-gsl-3.1.0/tests/assertion_tests.cpp
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:146:86: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator<(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() < rhs.get())
                                                                                
     ^
                                                                                
     nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:363:34: note: while 
substituting deduced template arguments into function template 'operator<' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp1(sp1) < NotNullSp1(sp1)) == false);
                                 ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:146:86: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator<(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() < rhs.get())
                                                                                
     ^
                                                                                
     nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:364:34: note: while 
substituting deduced template arguments into function template 'operator<' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<const int>]
    EXPECT_TRUE((NotNullSp1(sp1) < NotNullSp2(sp2)) == (sp1 < sp2));
                                 ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:364:61: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
    EXPECT_TRUE((NotNullSp1(sp1) < NotNullSp2(sp2)) == (sp1 < sp2));
                                                            ^
                                                            nullptr
/usr/include/gtest/gtest.h:1981:23: note: expanded from macro 'EXPECT_TRUE'
  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
                      ^
/usr/include/gtest/internal/gtest-internal.h:1511:34: note: expanded from macro 
'GTEST_TEST_BOOLEAN_'
      ::testing::AssertionResult(expression)) \
                                 ^
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:146:86: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator<(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() < rhs.get())
                                                                                
     ^
                                                                                
     nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:365:34: note: while 
substituting deduced template arguments into function template 'operator<' 
[with T = std::shared_ptr<const int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp2(sp2) < NotNullSp1(sp1)) == (sp2 < sp1));
                                 ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:365:61: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
    EXPECT_TRUE((NotNullSp2(sp2) < NotNullSp1(sp1)) == (sp2 < sp1));
                                                            ^
                                                            nullptr
/usr/include/gtest/gtest.h:1981:23: note: expanded from macro 'EXPECT_TRUE'
  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
                      ^
/usr/include/gtest/internal/gtest-internal.h:1511:34: note: expanded from macro 
'GTEST_TEST_BOOLEAN_'
      ::testing::AssertionResult(expression)) \
                                 ^
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:158:86: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator>(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() > rhs.get())
                                                                                
     ^
                                                                                
     nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:367:34: note: while 
substituting deduced template arguments into function template 'operator>' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp1(sp1) > NotNullSp1(sp1)) == false);
                                 ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:158:86: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator>(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() > rhs.get())
                                                                                
     ^
                                                                                
     nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:368:34: note: while 
substituting deduced template arguments into function template 'operator>' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<const int>]
    EXPECT_TRUE((NotNullSp1(sp1) > NotNullSp2(sp2)) == (sp1 > sp2));
                                 ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:368:61: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
    EXPECT_TRUE((NotNullSp1(sp1) > NotNullSp2(sp2)) == (sp1 > sp2));
                                                            ^
                                                            nullptr
/usr/include/gtest/gtest.h:1981:23: note: expanded from macro 'EXPECT_TRUE'
  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
                      ^
/usr/include/gtest/internal/gtest-internal.h:1511:34: note: expanded from macro 
'GTEST_TEST_BOOLEAN_'
      ::testing::AssertionResult(expression)) \
                                 ^
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:158:86: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator>(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() > rhs.get())
                                                                                
     ^
                                                                                
     nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:369:34: note: while 
substituting deduced template arguments into function template 'operator>' 
[with T = std::shared_ptr<const int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp2(sp2) > NotNullSp1(sp1)) == (sp2 > sp1));
                                 ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:369:61: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
    EXPECT_TRUE((NotNullSp2(sp2) > NotNullSp1(sp1)) == (sp2 > sp1));
                                                            ^
                                                            nullptr
/usr/include/gtest/gtest.h:1981:23: note: expanded from macro 'EXPECT_TRUE'
  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
                      ^
/usr/include/gtest/internal/gtest-internal.h:1511:34: note: expanded from macro 
'GTEST_TEST_BOOLEAN_'
      ::testing::AssertionResult(expression)) \
                                 ^
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:152:87: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator<=(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() <= rhs.get())
                                                                                
      ^~
                                                                                
      nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:371:34: note: while 
substituting deduced template arguments into function template 'operator<=' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp1(sp1) <= NotNullSp1(sp1)) == true);
                                 ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:152:87: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator<=(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() <= rhs.get())
                                                                                
      ^~
                                                                                
      nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:372:34: note: while 
substituting deduced template arguments into function template 'operator<=' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<const int>]
    EXPECT_TRUE((NotNullSp1(sp1) <= NotNullSp2(sp2)) == (sp1 <= sp2));
                                 ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:372:62: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
    EXPECT_TRUE((NotNullSp1(sp1) <= NotNullSp2(sp2)) == (sp1 <= sp2));
                                                             ^~
                                                             nullptr
/usr/include/gtest/gtest.h:1981:23: note: expanded from macro 'EXPECT_TRUE'
  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
                      ^
/usr/include/gtest/internal/gtest-internal.h:1511:34: note: expanded from macro 
'GTEST_TEST_BOOLEAN_'
      ::testing::AssertionResult(expression)) \
                                 ^
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:152:87: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator<=(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() <= rhs.get())
                                                                                
      ^~
                                                                                
      nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:373:34: note: while 
substituting deduced template arguments into function template 'operator<=' 
[with T = std::shared_ptr<const int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp2(sp2) <= NotNullSp1(sp1)) == (sp2 <= sp1));
                                 ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:373:62: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
    EXPECT_TRUE((NotNullSp2(sp2) <= NotNullSp1(sp1)) == (sp2 <= sp1));
                                                             ^~
                                                             nullptr
/usr/include/gtest/gtest.h:1981:23: note: expanded from macro 'EXPECT_TRUE'
  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
                      ^
/usr/include/gtest/internal/gtest-internal.h:1511:34: note: expanded from macro 
'GTEST_TEST_BOOLEAN_'
      ::testing::AssertionResult(expression)) \
                                 ^
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:164:87: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator>=(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() >= rhs.get())
                                                                                
      ^~
                                                                                
      nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:375:34: note: while 
substituting deduced template arguments into function template 'operator>=' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp1(sp1) >= NotNullSp1(sp1)) == true);
                                 ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:164:87: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator>=(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() >= rhs.get())
                                                                                
      ^~
                                                                                
      nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:376:34: note: while 
substituting deduced template arguments into function template 'operator>=' 
[with T = std::shared_ptr<int>, U = std::shared_ptr<const int>]
    EXPECT_TRUE((NotNullSp1(sp1) >= NotNullSp2(sp2)) == (sp1 >= sp2));
                                 ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:376:62: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
    EXPECT_TRUE((NotNullSp1(sp1) >= NotNullSp2(sp2)) == (sp1 >= sp2));
                                                             ^~
                                                             nullptr
/usr/include/gtest/gtest.h:1981:23: note: expanded from macro 'EXPECT_TRUE'
  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
                      ^
/usr/include/gtest/internal/gtest-internal.h:1511:34: note: expanded from macro 
'GTEST_TEST_BOOLEAN_'
      ::testing::AssertionResult(expression)) \
                                 ^
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
In file included from 
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:19:
/home/locutusofborg/ms-gsl-3.1.0/include/gsl/pointers:164:87: error: zero as 
null pointer constant [-Werror,-Wzero-as-null-pointer-constant]
auto operator>=(const not_null<T>& lhs, const not_null<U>& rhs) -> 
decltype(lhs.get() >= rhs.get())
                                                                                
      ^~
                                                                                
      nullptr
/usr/bin/../lib/gcc/s390x-linux-gnu/10/../../../../include/c++/10/bits/shared_ptr.h:448:5:
 note: while rewriting comparison as call to 'operator<=>' declared here
    operator<=>(const shared_ptr<_Tp>& __a,
    ^
/home/locutusofborg/ms-gsl-3.1.0/tests/notnull_tests.cpp:377:34: note: while 
substituting deduced template arguments into function template 'operator>=' 
[with T = std::shared_ptr<const int>, U = std::shared_ptr<int>]
    EXPECT_TRUE((NotNullSp2(sp2) >= NotNullSp1(sp1)) == (sp2 >= sp1));
                                 ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make[2]: *** [tests/CMakeFiles/notnull_tests.dir/build.make:85: 
tests/CMakeFiles/notnull_tests.dir/notnull_tests.cpp.o] Error 1
make[2]: Leaving directory '/home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl'
make[1]: *** [CMakeFiles/Makefile2:553: tests/CMakeFiles/notnull_tests.dir/all] 
Error 2
make[1]: *** Waiting for unfinished jobs....
[ 97%] Linking CXX executable assertion_tests
cd /home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl/tests && /usr/bin/cmake -E 
cmake_link_script CMakeFiles/assertion_tests.dir/link.txt --verbose=1
/usr/bin/clang++-11 -O3 -DNDEBUG -Lpippo/googletest/lib -rdynamic 
CMakeFiles/assertion_tests.dir/assertion_tests.cpp.o -o assertion_tests  
-lgtest_main -lpthread -lgtest -lpthread -lgtest 
make[2]: Leaving directory '/home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl'
[ 97%] Built target assertion_tests
make[1]: Leaving directory '/home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl'
make: *** [Makefile:163: all] Error 2
make: Leaving directory '/home/locutusofborg/ms-gsl-3.1.0/pippo/ms-gsl'

--- End Message ---
--- Begin Message --- 
Source: ms-gsl
Source-Version: 5.0.0-1
Done: Nicholas Guriev <[email protected]>

We believe that the bug you reported is fixed in the latest version of
ms-gsl, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Nicholas Guriev <[email protected]> (supplier of updated ms-gsl package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Format: 1.8
Date: Wed, 16 Sep 2026 14:30:25 +0300
Source: ms-gsl
Architecture: source
Version: 5.0.0-1
Distribution: unstable
Urgency: medium
Maintainer: Nicholas Guriev <[email protected]>
Changed-By: Nicholas Guriev <[email protected]>
Closes: 974841
Changes:
 ms-gsl (5.0.0-1) unstable; urgency=medium
 .
   * New upstream release.
   * Run autopkgtests directly with ctest(1).
   * Upgrade to Debhelper compatibility level 14.
   * Upgrade standards version to 4.7.4.
   * Set Dpkg build API level equal to 1.
   * Enable Clang tests on s390x (Closes: #974841).
   * Add autopkgtests with C++26.
   * Migrate to d/watch of version 5.
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Files:
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