[Clang][Modules] FE crashes when constructor using-decl are built in header units #134739
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yuxuanchen1997
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c++20
clang:modules
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@llvm/issue-subscribers-c-20 Author: Yuxuan Chen (yuxuanchen1997)
When upstream clang has assertion turned on, we crash on the following input:
File: struct relaxed_atomic_base {
relaxed_atomic_base(int) {}
};
struct relaxed_atomic : relaxed_atomic_base {
using relaxed_atomic_base::relaxed_atomic_base; // constructor
};File: import "RelaxedAtomic.h";
inline void getMaxDeferredReaders() {
static relaxed_atomic cache{0};
}File: import "RelaxedAtomic.h";
struct noncopyable {
noncopyable(const noncopyable&) = delete;
};
struct StaticMetaBase {
relaxed_atomic nextId_{0};
noncopyable ncp;
};Repro commands: On the third invocation of clang, we crash with the following back trace: Note that |
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@llvm/issue-subscribers-clang-modules Author: Yuxuan Chen (yuxuanchen1997)
When upstream clang has assertion turned on, we crash on the following input:
File: struct relaxed_atomic_base {
relaxed_atomic_base(int) {}
};
struct relaxed_atomic : relaxed_atomic_base {
using relaxed_atomic_base::relaxed_atomic_base; // constructor
};File: import "RelaxedAtomic.h";
inline void getMaxDeferredReaders() {
static relaxed_atomic cache{0};
}File: import "RelaxedAtomic.h";
struct noncopyable {
noncopyable(const noncopyable&) = delete;
};
struct StaticMetaBase {
relaxed_atomic nextId_{0};
noncopyable ncp;
};Repro commands: On the third invocation of clang, we crash with the following back trace: Note that |
yuxuanchen1997
changed the title
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Maybe related: #105994 but this is fixed in trunk, maybe you can take their godbolt example and produce a godbolt reproducer for this code? |
I am not sure if the godbolt template is going to work for me. The issue arises with header units only. CMake also automatically scans for dependencies, which will make the issue no longer repro here. |
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Maybe you can debug for how It may be helpful to investigate if this is a problem in named module and clang modules and if not, to figure out what's the difference. |
I do understand why |
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When upstream clang has assertion turned on, we crash on the following input:
File:
RelaxedAtomic.hFile:
SharedMutex.hFile:
ThreadLocalDetail.hRepro commands:
On the third invocation of clang, we crash with the following back trace:
Note that
ThreadLocalDetail.hdoesn't actually import "SharedMutex.h". If you remove-fmodule-file=SharedMutex.pcmpart this compilation succeeds. I also can't get it to repro when theusingdecl inrelaxed_atomicis replaced with its own constructor.The text was updated successfully, but these errors were encountered: