Bug 21387 - Compiler crashes on await in a using block with a goto statement
Summary: Compiler crashes on await in a using block with a goto statement
Alias: None
Product: Compilers
Classification: Mono
Component: C# ()
Version: 3.4.0
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: ---
Assignee: Marek Safar
Depends on:
Reported: 2014-07-17 01:09 UTC by bugzilla
Modified: 2014-07-22 07:41 UTC (History)
1 user (show)

Is this bug a regression?: ---
Last known good build:

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Description bugzilla 2014-07-17 01:09:50 UTC
The following code causes the C# compiler to crash (with code 1):

using System;
using System.Threading;
using System.Threading.Tasks;

class AwaitGotoBug
	public async Task Test()
		using ((IDisposable)null)
			if (Equals(1, 2))
				await Task.Yield();
				goto retry;
				await Task.Yield();

The "using" statement's resource acquisition expression is not important, and neither is the "if" test expression.

However, the compiler does not crash if any single line is commented out (the "using" statement, the "if" test, either of the "await" statements, or the goto).  Nor does it crash if the "goto" is moved into the "else" block, or the "goto" is moved above the preceding "await".
Comment 1 Marek Safar 2014-07-22 07:41:22 UTC
Fixed in master