https://bugs.llvm.org/show_bug.cgi?id=32732
Bug ID: 32732
Summary: Clang crashes on code completion in comment
[clang::Lexer::Lex (this=0x0, Result=...),
clang::Preprocessor::Lex (this=0x450df0, Result=...)]
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
LLVM @ https://llvm.org/svn/llvm-project/llvm/trunk@300096
Clang @ https://llvm.org/svn/llvm-project/cfe/trunk@300074
I can reproduce the crash with Clang 3.8/3.9/4.0 & current trunk.
Test case:
% cat ~/test5.c
#include "test5.h"
% cat ~/test5.h
#pragma once
struct a {
/* <CURSOR_HERE> */
struct {
} b;
};
% clang++ -cc1 -xc -fsyntax-only -code-completion-at /home/kfunk/test5.h:4:7
/home/kfunk/test5.c
Backtrace:
Thread 1 (Thread 0x7ffff3125740 (LWP 23633)):
#0 clang::Lexer::Lex (this=0x0, Result=...) at
/home/kfunk/devel/src/llvm/tools/clang/lib/Lex/Lexer.cpp:2912
#1 0x00007ffff415bd24 in clang::Preprocessor::Lex (this=0x450df0, Result=...)
at /home/kfunk/devel/src/llvm/tools/clang/lib/Lex/Preprocessor.cpp:745
#2 0x00007ffff3f92306 in clang::Parser::ConsumeToken (this=0x498000) at
/home/kfunk/devel/src/llvm/tools/clang/include/clang/Parse/Parser.h:313
#3 clang::Parser::ParseDeclOrFunctionDefInternal (this=0x498000, attrs=...,
DS=..., AS=clang::AS_none) at
/home/kfunk/devel/src/llvm/tools/clang/lib/Parse/Parser.cpp:932
#4 0x00007ffff3f91f69 in clang::Parser::ParseDeclarationOrFunctionDefinition
(this=0x498000, attrs=..., DS=<optimized out>, AS=clang::AS_none) at
/home/kfunk/devel/src/llvm/tools/clang/lib/Parse/Parser.cpp:1001
#5 0x00007ffff3f91564 in clang::Parser::ParseExternalDeclaration
(this=0x498000, attrs=..., DS=0x0) at
/home/kfunk/devel/src/llvm/tools/clang/lib/Parse/Parser.cpp:851
#6 0x00007ffff3f906d7 in clang::Parser::ParseTopLevelDecl (this=0x498000,
Result=...) at /home/kfunk/devel/src/llvm/tools/clang/lib/Parse/Parser.cpp:624
#7 0x00007ffff3f90139 in clang::Parser::ParseFirstTopLevelDecl (this=0x498000,
Result=...) at /home/kfunk/devel/src/llvm/tools/clang/lib/Parse/Parser.cpp:558
#8 0x00007ffff3f08975 in clang::ParseAST (S=..., PrintStats=<optimized out>,
SkipFunctionBodies=<optimized out>) at
/home/kfunk/devel/src/llvm/tools/clang/lib/Parse/ParseAST.cpp:146
#9 0x00007ffff608975f in clang::FrontendAction::Execute (this=0x44e1f0) at
/home/kfunk/devel/src/llvm/tools/clang/lib/Frontend/FrontendAction.cpp:512
#10 0x00007ffff604d288 in clang::CompilerInstance::ExecuteAction
(this=0x44bf80, Act=...) at
/home/kfunk/devel/src/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp:969
#11 0x00007ffff5fd57c1 in clang::ExecuteCompilerInvocation (Clang=<optimized
out>) at
/home/kfunk/devel/src/llvm/tools/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:249
#12 0x000000000040def1 in cc1_main (Argv=..., Argv0=<optimized out>,
MainAddr=<optimized out>) at
/home/kfunk/devel/src/llvm/tools/clang/tools/driver/cc1_main.cpp:221
#13 0x000000000040c669 in ExecuteCC1Tool (Tool=..., argv=...) at
/home/kfunk/devel/src/llvm/tools/clang/tools/driver/driver.cpp:299
#14 main (argc_=<optimized out>, argv_=<optimized out>) at
/home/kfunk/devel/src/llvm/tools/clang/tools/driver/driver.cpp:380
This seems to cause frequent crashes inside KDevelop. See downstream bug
report:
https://bugs.kde.org/show_bug.cgi?id=372686
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