Created attachment 316791 [details]
test case

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gmcs fails to compile an anonymous method which:
1. Returns a value
2. Contains a 'switch' statement, in which each case 'returns'
3. 'default' case contains a 'return' statement or 'throw'

A workaround is to change the body of the 'default' branch to 'break;' and throw/return the default value after the 'switch'.

Error message: "error CS1643: Not all code paths return a value in anonymous method of type 'X'".

Reproducible: Always

Steps to Reproduce:
A test case is attached. The first switch compiles fine, the second and third do not.
Actual Results:  
Error message: "error CS1643: Not all code paths return a value in anonymous method of type 'X'".

Expected Results:  
The code should compile fine (it does on MS.Net).