http://llvm.org/bugs/show_bug.cgi?id=18343
Bug ID: 18343
Summary: Regression: Clang fails to compile lambda with by-ref
capture of incomplete type
Product: clang
Version: trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
The following program fails to compile with clang r198208, while it compiles
with clang r197376:
struct Foo;
static void bar(Foo& foo)
{
[&]() {
foo;
};
}
This results in:
% ~/LLVM/build/Release+Asserts/bin/clang++ -c -std=c++11 clang.cpp
clang.cpp:6:9: error: by-copy capture of variable 'foo' with incomplete type
'Foo'
foo;
^
clang.cpp:1:8: note: forward declaration of 'Foo'
struct Foo;
^
[2 warnings about unused expression result]
2 warnings and 1 error generated.
This seems to have been introduced in r197623[*] with a fix to require a
by-copy capture to have a complete type. I don't think completeness is
necessary for by-ref captures.
[*]
<http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20131216/095880.html>
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