Open
Description
| Previous ID | SR-15229 |
| Radar | rdar://problem/83411414 |
| Original Reporter | natinusala (JIRA User) |
| Type | Bug |
Environment
-
Ubuntu 20.04
-
Swift 5.5 (september 20th-something release) official build
-
stdlib installed with libstdc++-10-dev
Additional Detail from JIRA
| Votes | 0 |
| Component/s | Compiler, Foundation |
| Labels | Bug |
| Assignee | None |
| Priority | Medium |
md5: 4e189258882818903efee073a7ab5c2c
Issue Description:
When building any file that has :
-
a integer comparison
-
Foundation imported
With `-Xswiftc -enable-experimental-cxx-interop` on an Ubuntu system that has libstdc++ 10, the following error appears :
/usr/include/c++/10/ext/numeric_traits.h:64:7: error: static_assert failed due to requirement '__is_integer_nonstrict<float>::__value' "invalid specialization"
static_assert(__is_integer_nonstrict<_Value>::__value,
^
/usr/include/c++/10/ext/numeric_traits.h:61:12: note: in instantiation of template class '__gnu_cxx::__numeric_traits_integer<float>' requested here
struct __numeric_traits_integer
^
/usr/include/c++/10/ext/numeric_traits.h:64:7: error: static_assert failed due to requirement '__is_integer_nonstrict<double>::__value' "invalid specialization"
static_assert(__is_integer_nonstrict<_Value>::__value,
^
/usr/include/c++/10/ext/numeric_traits.h:61:12: note: in instantiation of template class '__gnu_cxx::__numeric_traits_integer<double>' requested here
struct __numeric_traits_integer
^
/usr/include/c++/10/ext/numeric_traits.h:64:7: error: static_assert failed due to requirement '__is_integer_nonstrict<long double>::__value' "invalid specialization"
static_assert(__is_integer_nonstrict<_Value>::__value,
^
/usr/include/c++/10/ext/numeric_traits.h:61:12: note: in instantiation of template class '__gnu_cxx::__numeric_traits_integer<long double>' requested here
struct __numeric_traits_integer
^If you remove either the Foundation import or the integer comparison, the error goes away. It also goes away if you try to build without the experimental CXX interop feature. Removing libstdc++ 10 is a workaround to the issue, since Swift now seems to use libstc++ 9 instead. or so I thought
Example program (in main.swift of a freshly made executable package) :
import Foundation
print("Hello, world!")
let foobar = 50
if foobar == 50 { print("50") }Build with :
swift build -Xswiftc -enable-experimental-cxx-interop -c release -v