| Issue |
58196
|
| Summary |
Clang assert tripped when merging modules with deduction guides.
|
| Labels |
clang:frontend,
clang:modules,
new issue,
crash-on-valid
|
| Assignees |
|
| Reporter |
mizvekov
|
Repro:
````
// RUN: rm -fr %t
// RUN: mkdir %t
// RUN: split-file %s %t
//
// RUN: %clang_cc1 -std=c++20 %t/B.cppm -I%t -emit-module-interface -o %t/B.pcm
// RUN: %clang_cc1 -std=c++20 -fsyntax-only %t/A.cppm -I%t -fprebuilt-module-path=%t
//--- A.cppm
module;
export module baz:A;
import B;
#include "C.h"
//--- B.cppm
module;
#include "C.h"
export module B;
//--- C.h
namespace foo {
template<class T, class U> struct bar {
template<class, class> bar(T, U);
};
template<class T, class U> bar(T, U) -> bar<T, U>;
}
````
Crash:
```
Assertion failed: !Old || Old->getCachedLinkage() == D->getCachedLinkage(), file clang\lib\AST\Decl.cpp, line 1548
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: build\\llvm\\debug\\bin\\clang.exe -cc1 -internal-isystem build\\llvm\\debug\\lib\\clang\\16.0.0\\include -nostdsysteminc -std=c++20 -fsyntax-only build\\llvm\\tools\\clang\\test\\Modules\\Output\\repro.cppm.tmp/A.cppm -Ibuild\\llvm\\tools\\clang\\test\\Modules\\Output\\repro.cppm.tmp -fprebuilt-module-path=build\\llvm\\tools\\clang\\test\\Modules\\Output\\repro.cppm.tmp
1. build\llvm\tools\clang\test\Modules\Output\repro.cppm.tmp/C.h:5:52: current parser token ';'
2. build\llvm\tools\clang\test\Modules\Output\repro.cppm.tmp/C.h:1:1: parsing namespace 'foo'
Exception Code: 0x80000003
#0 0x00007ff6c4ab203c HandleAbort llvm\lib\Support\Windows\Signals.inc:414:0
#1 0x00007ffb14848e05 (C:\WINDOWS\SYSTEM32\ucrtbased.dll+0xa8e05)
#2 0x00007ffb1484ab29 (C:\WINDOWS\SYSTEM32\ucrtbased.dll+0xaab29)
#3 0x00007ffb1485094f (C:\WINDOWS\SYSTEM32\ucrtbased.dll+0xb094f)
#4 0x00007ffb1484e881 (C:\WINDOWS\SYSTEM32\ucrtbased.dll+0xae881)
#5 0x00007ffb1485158f (C:\WINDOWS\SYSTEM32\ucrtbased.dll+0xb158f)
#6 0x00007ff6cc2d32ab clang::LinkageComputer::getLVForDecl(class clang::NamedDecl const *, struct clang::LVComputationKind) clang\lib\AST\Decl.cpp:1548:0
#7 0x00007ff6cc2c11fd clang::NamedDecl::getLinkageInternal(void) const clang\lib\AST\Decl.cpp:1153:0
#8 0x00007ff6c553c074 clang::NamedDecl::isExternallyVisible(void) const clang\include\clang\AST\Decl.h:406:0
#9 0x00007ff6caa8ec41 clang::Sema::ActOnFunctionDeclarator(class clang::Scope *, class clang::Declarator &, class clang::DeclContext *, class clang::TypeSourceInfo *, class clang::LookupResult &, class llvm::MutableArrayRef<class clang::TemplateParameterList *>, bool &) clang\lib\Sema\SemaDecl.cpp:10408:0
#10 0x00007ff6caa7f2fe clang::Sema::HandleDeclarator(class clang::Scope *, class clang::Declarator &, class llvm::MutableArrayRef<class clang::TemplateParameterList *>) clang\lib\Sema\SemaDecl.cpp:6365:0
#11 0x00007ff6cae85aa7 clang::Sema::ActOnTemplateDeclarator(class clang::Scope *, class llvm::MutableArrayRef<class clang::TemplateParameterList *>, class clang::Declarator &) clang\lib\Sema\SemaTemplate.cpp:8807:0
#12 0x00007ff6ca03213c clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(class clang::Declarator &, struct clang::Parser::ParsedTemplateInfo const &, struct clang::Parser::ForRangeInit *) clang\lib\Parse\ParseDecl.cpp:2367:0
#13 0x00007ff6ca031d95 clang::Parser::ParseDeclarationAfterDeclarator(class clang::Declarator &, struct clang::Parser::ParsedTemplateInfo const &) clang\lib\Parse\ParseDecl.cpp:2307:0
#14 0x00007ff6ca07c2f8 clang::Parser::ParseSingleDeclarationAfterTemplate(enum clang::DeclaratorContext, struct clang::Parser::ParsedTemplateInfo const &, class clang::ParsingDeclRAIIObject &, class clang::SourceLocation &, class clang::ParsedAttributes &, enum clang::AccessSpecifier) clang\lib\Parse\ParseTemplate.cpp:359:0
#15 0x00007ff6ca07b025 clang::Parser::ParseTemplateDeclarationOrSpecialization(enum clang::DeclaratorContext, class clang::SourceLocation &, class clang::ParsedAttributes &, enum clang::AccessSpecifier) clang\lib\Parse\ParseTemplate.cpp:170:0
#16 0x00007ff6ca07a7ad clang::Parser::ParseDeclarationStartingWithTemplate(enum clang::DeclaratorContext, class clang::SourceLocation &, class clang::ParsedAttributes &, enum clang::AccessSpecifier) clang\lib\Parse\ParseTemplate.cpp:47:0
#17 0x00007ff6ca02faab clang::Parser::ParseDeclaration(enum clang::DeclaratorContext, class clang::SourceLocation &, class clang::ParsedAttributes &, class clang::ParsedAttributes &, class clang::SourceLocation *) clang\lib\Parse\ParseDecl.cpp:1777:0
#18 0x00007ff6c9fde26a clang::Parser::ParseExternalDeclaration(class clang::ParsedAttributes &, class clang::ParsingDeclSpec *) clang\lib\Parse\Parser.cpp:946:0
#19 0x00007ff6ca124905 clang::Parser::ParseInnerNamespace(class llvm::SmallVector<struct clang::Parser::InnerNamespaceInfo, 4> const &, unsigned int, class clang::SourceLocation &, class clang::ParsedAttributes &, class clang::BalancedDelimiterTracker &) clang\lib\Parse\ParseDeclCXX.cpp:260:0
#20 0x00007ff6ca1246a0 clang::Parser::ParseNamespace(enum clang::DeclaratorContext, class clang::SourceLocation &, class clang::SourceLocation) clang\lib\Parse\ParseDeclCXX.cpp:240:0
#21 0x00007ff6ca02fd3f clang::Parser::ParseDeclaration(enum clang::DeclaratorContext, class clang::SourceLocation &, class clang::ParsedAttributes &, class clang::ParsedAttributes &, class clang::SourceLocation *) clang\lib\Parse\ParseDecl.cpp:1798:0
#22 0x00007ff6c9fde26a clang::Parser::ParseExternalDeclaration(class clang::ParsedAttributes &, class clang::ParsingDeclSpec *) clang\lib\Parse\Parser.cpp:946:0
#23 0x00007ff6c9fd7cfb clang::Parser::ParseTopLevelDecl(class clang::OpaquePtr<class clang::DeclGroupRef> &, enum clang::Sema::ModuleImportState &) clang\lib\Parse\Parser.cpp:737:0
#24 0x00007ff6c9fd2edd clang::ParseAST(class clang::Sema &, bool, bool) clang\lib\Parse\ParseAST.cpp:162:0
#25 0x00007ff6c660ceda clang::ASTFrontendAction::ExecuteAction(void) clang\lib\Frontend\FrontendAction.cpp:1161:0
#26 0x00007ff6c660c7ce clang::FrontendAction::Execute(void) clang\lib\Frontend\FrontendAction.cpp:1056:0
#27 0x00007ff6c65849cc clang::CompilerInstance::ExecuteAction(class clang::FrontendAction &) clang\lib\Frontend\CompilerInstance.cpp:1043:0
#28 0x00007ff6c684cff0 clang::ExecuteCompilerInvocation(class clang::CompilerInstance *) clang\lib\FrontendTool\ExecuteCompilerInvocation.cpp:266:0
#29 0x00007ff6c1dd2a84 cc1_main(class llvm::ArrayRef<char const *>, char const *, void *) clang\tools\driver\cc1_main.cpp:250:0
#30 0x00007ff6c1dbac58 ExecuteCC1Tool clang\tools\driver\driver.cpp:316:0
#31 0x00007ff6c1dbb69f clang_main(int, char **) clang\tools\driver\driver.cpp:388:0
#32 0x00007ff6c1e000ac main build\llvm\tools\clang\tools\driver\clang-driver.cpp:11:0
#33 0x00007ff6cd7708a9 invoke_main D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:79:0
#34 0x00007ff6cd77074e __scrt_common_main_seh D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288:0
#35 0x00007ff6cd77060e __scrt_common_main D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:331:0
#36 0x00007ff6cd77093e mainCRTStartup D:\a\_work\1\s\src\vctools\crt\vcstartup\src\startup\exe_main.cpp:17:0
#37 0x00007ffbddbc244d (C:\WINDOWS\System32\KERNEL32.DLL+0x1244d)
#38 0x00007ffbdf46df78 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x5df78)
```
In that case, `D->getCachedLinkage()` is `ModuleLinkage`, while `Old->getCachedLinkage()` is `ExternalLinkage`.
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