Initializer list in a lambda crashes

Initializer list in a lambda crashes by BudVVeezer

Closed

as Fixed

Type:	Bug
ID:	743303
Opened:	5/23/2012 9:39:59 AM
Access Restriction:	Public
Moderator Decision:	Sent to Engineering Team for consideration

Workaround(s)

view

User(s) can reproduce this bug

The following reduced testcase produces an ICE with the compiler. If you modify the code slightly, it produces an incorrect compile error.

Details (expand)

Visual Studio 2010 SP1

struct foo {
void *bar;
};
auto str = ([]() -> int { static const foo val = { nullptr }; return 0; }()); // 1
auto str = ([]() -> int { static const struct foo val = { 0 }; return 0; }()); // 2

English

Windows 7

English

The first example crashes the compiler. The second example incorrectly emits the following diagnostic:

error C2552: 'val' : non-aggregates cannot be initialized with initializer list
'`anonymous-namespace'::<lambda0>::()::foo' : Types with user defined constructors are not aggregate

I'd expect this to work without crashing.

0 attachments

Posted by Microsoft on 5/24/2012 at 10:25 AM

Hi:
A fix for this issue has been checked into the compiler sources. The fix should show up in the next release of Visual C++.

Xiang Fan
Visual C++ Team

Posted by MS-Moderator10 [Feedback Moderator] on 5/23/2012 at 11:25 PM

Thanks for your feedback.

We are rerouting this issue to the appropriate group within the Visual Studio Product Team for triage and resolution. These specialized experts will follow-up with your issue.

Posted by BudVVeezer on 5/23/2012 at 10:21 AM

Also note that moving the structure declaration to the top level changes the behavior.

1) Local to function == causes crash/error
2) At translation unit level, with static const declaration == causes internal error with the compiler

fatal error C1001: An internal error has occurred in the compiler.
1> (compiler file 'f:\dd\vctools\compiler\utc\src\p2\p2symtab.c', line 5858)
1> To work around this problem, try simplifying or changing the program near the locations listed above.
1> Please choose the Technical Support command on the Visual C++
1> Help menu, or open the Technical Support help file for more information

3) At translation unit level, without static const declaration == compiles cleanly

Posted by MS-Moderator01 on 5/23/2012 at 9:42 AM

Thank you for your feedback, we are currently reviewing the issue you have submitted. If this issue is urgent, please contact support directly(http://support.microsoft.com)

Posted by BudVVeezer on 5/23/2012 at 9:41 AM

Note that removing the static const has no effect on the outcome.