| Issue |
60929
|
| Summary |
Clang is unable to match calls to functions with a std::initializer_list when modules are enabled and a class with a virtual destructor is defined before #include <initializer_list>
|
| Labels |
libc++,
clang:frontend,
clang:modules
|
| Assignees |
|
| Reporter |
alanzhao1
|
I have commit b673135bb833a54b16c32e2073d2d7b83c90de66 checked out
Repro steps:
1. Build and install libc++:
```
$ cmake -G Ninja -B build -S runtimes -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind" -DLIBCXX_ABI_UNSTABLE=On
$ cd build
$ ninja cxx cxxabi unwind
$ ninja install-cxx install-cxxabi install-unwind
```
2. Build clang
3. Attempt to compile the following file against the aforementioned installed libc++
```cpp
// initlist_test.cc
class X {
public:
virtual ~X() {}
};
#include <initializer_list>
void takesil(std::initializer_list<int> il) {}
void passesil() { takesil({1}); }
```
```
$ /path/to/built/clang++ -nostdinc++ -isystem/path/to/installed/clang/include/c++/v1 -fmodules -fbuiltin-module-map -fmodule-map-file=/path/to/installed/clang/include/c++/v1/module.modulemap -c -o initlist_test.cc initlist_test
```
Expected result:
clang should compile the file without any errors
Actual result:
clang fails to match the call to `takesil(...)` in `passesil()`:
```
initlist_test.cc:11:19: error: no matching function for call to 'takesil'
void passesil() { takesil({1});}
^~~~~~~
initlist_test.cc:9:6: note: candidate function not viable: cannot convert initializer list argument to 'std::initializer_list<int>'
void takesil(std::initializer_list<int> il) {}
^
1 error generated.
```
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