http://llvm.org/bugs/show_bug.cgi?id=9928
Summary: objective C rewriter doesn't like token-pasting
Product: clang
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: Frontend
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
If you have code with blocks inside macros with token pasting in it, the
rewriter crashes. If you remove the token pasting it works just fine.
In the example below, the 'void (^blk)(void)' is to trigger a rewrite that
results in a crash.
$ cat a.m
#define paste(n) \
static void _##n(void (^blk)(void)) { }
paste(foo);
$ clang -cc1 -fblocks -rewrite-objc a.m -o a.cc
0 clang 0x00000000019d32bf
1 clang 0x00000000019d3dfa
2 libpthread.so.0 0x00007f79c7ac4020
3 clang 0x0000000000d6de80
4 clang 0x0000000000d6e5a0
5 clang 0x0000000000d7fa5f
6 clang 0x0000000000d802e8
7 clang 0x0000000000d8149f
8 clang 0x00000000008fa6d4 clang::ParseAST(clang::Sema&, bool) + 228
9 clang 0x00000000006a6ba3
clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 371
10 clang 0x000000000067f66a
clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1290
11 clang 0x000000000067475d cc1_main(char const**, char const**, char
const*, void*) + 701
12 clang 0x000000000067e3b2 main + 6818
13 libc.so.6 0x00007f79c6daaead __libc_start_main + 253
14 clang 0x00000000006742b9
Stack dump:
0. Program arguments: clang -cc1 -fblocks -rewrite-objc a.m -o a.cc
1. a.m:4:11: current parser token ';'
[1] 15995 segmentation fault clang -cc1 -fblocks -rewrite-objc a.m -o a.cc
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