Review Request 126154: Clang: fix crash when editing variadic template "recursive" class
Gleb Popov
6yearold at gmail.com
Mon Dec 21 09:39:36 UTC 2015
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This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/126154/#review89810
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I was able to reproduce your problem, but your patch doesn't fix it for me. Any ideas?
- Gleb Popov
On Nov. 25, 2015, 1:16 p.m., Maciej Cencora wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/126154/
> -----------------------------------------------------------
>
> (Updated Nov. 25, 2015, 1:16 p.m.)
>
>
> Review request for KDevelop.
>
>
> Repository: kdevelop
>
>
> Description
> -------
>
> The crash cannot be reproduced on completion, only when editing such class.
> To reproduce:
> 1) create and save file with following content
> template <typename Head, typename ...Tail>
> struct my_class : Head, my_class<Tail...>
> {
> using base = Head;
> };
> 2) in line with 'using' statement, mark the 'Head' text
> 3) delete text
> 4) write something (e.g. press letter 'a')
>
> Not sure whether this is proper fix, but backtrace shows infinite recursion.
> #0 clang::operator<< (OS=..., N=...) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/lib/AST/DeclarationName.cpp:136
> #1 0x00007fff7d266e9d in clang::NamedDecl::printName (this=<optimized out>, os=...) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/../../include/clang/AST/Decl.h:150
> #2 getDeclSpelling (D=0x7fff9403bd00) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:3491
> #3 0x00007fff7d267686 in clang_getCursorSpelling (C=...) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:3625
> #4 0x00007fff7deb2e51 in (anonymous namespace)::baseClassVisitor (cursor=..., parent=..., data=0x7fff7c8f5090) at /home/mcencora/tmp/kdevelop/languages/clang/codecompletion/completionhelper.cpp:158
> #5 0x00007fff7d259add in clang::cxcursor::CursorVisitor::Visit (this=this at entry=0x7fff7c8f4f10, Cursor=..., CheckedRegionOfInterest=CheckedRegionOfInterest at entry=false)
> at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:210
> #6 0x00007fff7d25bc34 in clang::cxcursor::CursorVisitor::VisitTemplateParameters (this=this at entry=0x7fff7c8f4f10, Params=<optimized out>) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:1321
> #7 0x00007fff7d259235 in clang::cxcursor::CursorVisitor::VisitClassTemplateDecl (this=0x7fff7c8f4f10, D=0x7fff9403bef0) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:903
> #8 0x00007fff7d2595db in clang::cxcursor::CursorVisitor::VisitChildren (this=this at entry=0x7fff7c8f4f10, Cursor=...) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:500
> #9 0x00007fff7d260024 in clang_visitChildren (parent=..., visitor=0x7fff7deb2ddf <(anonymous namespace)::baseClassVisitor(CXCursor, CXCursor, CXClientData)>, client_data=0x7fff7c8f5090)
> at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:3419
> #10 0x00007fff7deb2dac in (anonymous namespace)::processBaseClass (cursor=..., parent=..., functionList=0x7fff74003590) at /home/mcencora/tmp/kdevelop/languages/clang/codecompletion/completionhelper.cpp:148
> #11 0x00007fff7deb2f42 in (anonymous namespace)::baseClassVisitor (cursor=..., parent=..., data=0x7fff7c8f5580) at /home/mcencora/tmp/kdevelop/languages/clang/codecompletion/completionhelper.cpp:166
> #12 0x00007fff7d259add in clang::cxcursor::CursorVisitor::Visit (this=this at entry=0x7fff7c8f5400, Cursor=..., CheckedRegionOfInterest=CheckedRegionOfInterest at entry=false)
> at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:210
> #13 0x00007fff7d25919a in clang::cxcursor::CursorVisitor::VisitCXXRecordDecl (this=0x7fff7c8f5400, D=0x7fff9403be60) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:1672
> #14 0x00007fff7d2595db in clang::cxcursor::CursorVisitor::VisitChildren (this=this at entry=0x7fff7c8f5400, Cursor=...) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:500
> #15 0x00007fff7d260024 in clang_visitChildren (parent=..., visitor=0x7fff7deb2ddf <(anonymous namespace)::baseClassVisitor(CXCursor, CXCursor, CXClientData)>, client_data=0x7fff7c8f5580)
> at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:3419
> #16 0x00007fff7deb2dac in (anonymous namespace)::processBaseClass (cursor=..., parent=..., functionList=0x7fff74003590) at /home/mcencora/tmp/kdevelop/languages/clang/codecompletion/completionhelper.cpp:148
> #17 0x00007fff7deb2f42 in (anonymous namespace)::baseClassVisitor (cursor=..., parent=..., data=0x7fff7c8f5a70) at /home/mcencora/tmp/kdevelop/languages/clang/codecompletion/completionhelper.cpp:166
> #18 0x00007fff7d259add in clang::cxcursor::CursorVisitor::Visit (this=this at entry=0x7fff7c8f58f0, Cursor=..., CheckedRegionOfInterest=CheckedRegionOfInterest at entry=false)
> at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:210
> #19 0x00007fff7d25919a in clang::cxcursor::CursorVisitor::VisitCXXRecordDecl (this=0x7fff7c8f58f0, D=0x7fff9403be60) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:1672
> #20 0x00007fff7d2595db in clang::cxcursor::CursorVisitor::VisitChildren (this=this at entry=0x7fff7c8f58f0, Cursor=...) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:500
> #21 0x00007fff7d260024 in clang_visitChildren (parent=..., visitor=0x7fff7deb2ddf <(anonymous namespace)::baseClassVisitor(CXCursor, CXCursor, CXClientData)>, client_data=0x7fff7c8f5a70)
> at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:3419
> #22 0x00007fff7deb2dac in (anonymous namespace)::processBaseClass (cursor=..., parent=..., functionList=0x7fff74003590) at /home/mcencora/tmp/kdevelop/languages/clang/codecompletion/completionhelper.cpp:148
> #23 0x00007fff7deb2f42 in (anonymous namespace)::baseClassVisitor (cursor=..., parent=..., data=0x7fff7c8f5f60) at /home/mcencora/tmp/kdevelop/languages/clang/codecompletion/completionhelper.cpp:166
> #24 0x00007fff7d259add in clang::cxcursor::CursorVisitor::Visit (this=this at entry=0x7fff7c8f5de0, Cursor=..., CheckedRegionOfInterest=CheckedRegionOfInterest at entry=false)
> at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:210
> #25 0x00007fff7d25919a in clang::cxcursor::CursorVisitor::VisitCXXRecordDecl (this=0x7fff7c8f5de0, D=0x7fff9403be60) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:1672
> #26 0x00007fff7d2595db in clang::cxcursor::CursorVisitor::VisitChildren (this=this at entry=0x7fff7c8f5de0, Cursor=...) at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:500
> #27 0x00007fff7d260024 in clang_visitChildren (parent=..., visitor=0x7fff7deb2ddf <(anonymous namespace)::baseClassVisitor(CXCursor, CXCursor, CXClientData)>, client_data=0x7fff7c8f5f60)
> at /build/llvm-toolchain-3.6-18MJNr/llvm-toolchain-3.6-3.6.2/tools/clang/tools/libclang/CIndex.cpp:3419
>
> ... and this goes on for 39K frames
>
>
> Diffs
> -----
>
> languages/clang/codecompletion/completionhelper.cpp ac307ef
>
> Diff: https://git.reviewboard.kde.org/r/126154/diff/
>
>
> Testing
> -------
>
> Manual.
>
>
> Thanks,
>
> Maciej Cencora
>
>
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