| Summary: | Reproducible crash in libclang after ::Visitor::setTypeSize | ||
|---|---|---|---|
| Product: | [Applications] kdevelop | Reporter: | Benjamin Huth <benjamin-huth> |
| Component: | Language Support: CPP (Clang-based) | Assignee: | kdevelop-bugs-null |
| Status: | REPORTED --- | ||
| Severity: | crash | CC: | igorkuo |
| Priority: | NOR | ||
| Version First Reported In: | git master | ||
| Target Milestone: | --- | ||
| Platform: | Compiled Sources | ||
| OS: | Linux | ||
| Latest Commit: | Version Fixed In: | ||
| Sentry Crash Report: | |||
| Attachments: | source file to reproduce the crash (wrapped in archive because of file size) | ||
Created attachment 170166 [details]
source file to reproduce the crash (wrapped in archive because of file size)
In case its important, the system details: Operating System: Fedora Linux 40 KDE Plasma Version: 6.0.4 KDE Frameworks Version: 6.2.0 Qt Version: 6.7.0 Kernel Version: 6.8.10-300.fc40.x86_64 (64-bit) Graphics Platform: Wayland The posted backtrace is incomplete (only 10 last stack frames). The only backtrace containing Visitor::setTypeSize on my disk is the one discussed in https://invent.kde.org/kdevelop/kdevelop/-/merge_requests/210#note_156543 - this crash has been fixed before the merge request was merged. But maybe you hit another edge case. Or this could be a regression in Clang 18. The only reported bug containing Visitor::setTypeSize is Bug 451856. Could be related. |
SUMMARY Today I observed an crash in KDevelop, and I was able to extract a single source file that can reproduce the crash, see attached file (produced using g++ -E, so no includes required). The crash seems to happen in (anonymous namespace)::Visitor::setTypeSize in src/plugins/clang/duchain/builder.cpp:950 KDevelop is built from sources against clang version 18.1.1 (Fedora 18.1.1-1.fc40). In principle I'm willing to look into this, but currently I do not have time, and maybe some experts already have an idea what this is. Backtrace in gdb: #0 0x00007fffa0ee4104 in clang::ASTContext::getTypeInfoImpl(clang::Type const*) const () at /lib64/libclang.so.18.1 #1 0x00007fffa0ee5d5a in clang::ASTContext::getTypeInfoInChars(clang::Type const*) const () at /lib64/libclang.so.18.1 #2 0x00007fffa0ee5c50 in clang::ASTContext::getTypeInfoInChars(clang::Type const*) const () at /lib64/libclang.so.18.1 #3 0x00007fffa0ec4efc in clang_Type_getSizeOf () at /lib64/libclang.so.18.1 #4 0x00007fffae29d9a6 in (anonymous namespace)::Visitor::setTypeSize (type=..., kdevType=kdevType@entry=0x7fff83b924b0, this=<optimized out>) at /home/benjamin/Developement/kdevelop/kdevelop/src/plugins/clang/duchain/builder.cpp:950 #5 0x00007fffae2a069d in (anonymous namespace)::Visitor::dispatchType<(CXTypeKind)177> (this=<optimized out>, type=..., cursor=...) at /home/benjamin/Developement/kdevelop/kdevelop/src/plugins/clang/duchain/builder.cpp:372 #6 (anonymous namespace)::Visitor::makeType (this=<optimized out>, type=..., parent=...) at /home/benjamin/Developement/kdevelop/kdevelop/src/plugins/clang/duchain/builder.cpp:1466 #7 0x00007fffae2aa455 in (anonymous namespace)::Visitor::createType<(CXCursorKind)10> (this=0x7fffa0bff6a0, cursor=...) at /home/benjamin/Developement/kdevelop/kdevelop/src/plugins/clang/duchain/builder.cpp:707 #8 (anonymous namespace)::Visitor::createDeclaration<(CXCursorKind)10, KDevelop::Declaration> (context=0x0, this=0x7fffa0bff6a0, cursor=..., id=...) at /home/benjamin/Developement/kdevelop/kdevelop/src/plugins/clang/duchain/builder.cpp:457 #9 (anonymous namespace)::Visitor::buildDeclaration<(CXCursorKind)10, KDevelop::Declaration, false> (this=this@entry=0x7fffa0bff6a0, cursor=...) at /home/benjamin/Developement/kdevelop/kdevelop/src/plugins/clang/duchain/builder.cpp:1296 #10 0x00007fffae2b2d6f in (anonymous namespace)::Visitor::dispatchCursor<(CXCursorKind)13, (Decision)1, (Decision)1> (this=0x7fffa0bff6a0, cursor=..., parent=...) at /home/benjamin/Developement/kdevelop/kdevelop/src/plugins/clang/duchain/builder.cpp:988 STEPS TO REPRODUCE 1. open empty session with empty project with attached file 2. wait a bit until background parser starts OBSERVED RESULT KDevelop crashes EXPECTED RESULT No crash SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION