https://bugzilla.novell.com/show_bug.cgi?id=353457
Summary: Compiler crashes when encountering anonymous method
passed to params method
Product: Mono: Compilers
Version: 1.2.6
Platform: Other
OS/Version: Other
Status: NEW
Severity: Blocker
Priority: P5 - None
Component: C#
AssignedTo: [email protected]
ReportedBy: [EMAIL PROTECTED]
QAContact: [email protected]
Found By: ---
I have run into another regression with gmcs 1.2.6.
If an anonymous method is passed to a method that has a params argument, the
compiler will crash.
..
delegate void Handler ();
void Method (Handler handler, params string [] args) { }
Method (delegate { }); // compiler crashes here
..
I will attach a test case. What follows is the exception produced by gmcs. I
have marked the severity of this bug Blocker since I have confirmed it is a
regression in the compiler by testing this case against gmcs 1.2.2 and 1.2.4. I
have not however tested 1.2.5, so this bug may exist in that version as well.
----
[EMAIL PROTECTED]:~/svn/banshee/src$ gmcs
params-method-with-anonymous-method-in-call.cs
Exception caught by the compiler while compiling:
Block that caused the problem begin at:
params-method-with-anonymous-method-in-call.cs(9,24):
Block being compiled:
[params-method-with-anonymous-method-in-call.cs(10,5):,params-method-with-anonymous-method-in-call.cs(18,5):]
System.NullReferenceException: Object reference not set to an instance of an
object
Internal compiler error at
params-method-with-anonymous-method-in-call.cs(9,24):: exception caught while
emitting MethodBuilder [Thing::Main]
Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object
at Mono.CSharp.AnonymousMethodExpression.ImplicitStandardConversionExists
(System.Type delegate_type) [0x00000]
at Mono.CSharp.Convert.ImplicitStandardConversionExists
(Mono.CSharp.Expression expr, System.Type target_type) [0x00000]
at Mono.CSharp.Convert.ImplicitConversionExists (Mono.CSharp.EmitContext ec,
Mono.CSharp.Expression expr, System.Type target_type) [0x00000]
at Mono.CSharp.MethodGroupExpr.IsParamsMethodApplicable
(Mono.CSharp.EmitContext ec, System.Collections.ArrayList arguments, Int32
arg_count, System.Reflection.MethodBase candidate, Boolean do_varargs)
[0x00000]
at Mono.CSharp.MethodGroupExpr.IsParamsMethodApplicable
(Mono.CSharp.EmitContext ec, System.Collections.ArrayList arguments, Int32
arg_count, Boolean do_varargs, System.Reflection.MethodBase& candidate)
[0x00000]
at Mono.CSharp.MethodGroupExpr.IsParamsMethodApplicable
(Mono.CSharp.EmitContext ec, System.Collections.ArrayList arguments, Int32
arg_count, System.Reflection.MethodBase& candidate) [0x00000]
at Mono.CSharp.MethodGroupExpr.OverloadResolve (Mono.CSharp.EmitContext ec,
System.Collections.ArrayList Arguments, Boolean may_fail, Location loc)
[0x00000]
at Mono.CSharp.Invocation.DoResolveOverload (Mono.CSharp.EmitContext ec)
[0x00000]
at Mono.CSharp.Invocation.DoResolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec, ResolveFlags
flags) [0x00000]
at Mono.CSharp.Expression.Resolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.ExpressionStatement.ResolveStatement (Mono.CSharp.EmitContext
ec) [0x00000]
at Mono.CSharp.StatementExpression.Resolve (Mono.CSharp.EmitContext ec)
[0x00000]
at Mono.CSharp.Block.Resolve (Mono.CSharp.EmitContext ec) [0x00000]
at Mono.CSharp.EmitContext.ResolveTopBlock (Mono.CSharp.EmitContext
anonymous_method_host, Mono.CSharp.ToplevelBlock block, Mono.CSharp.Parameters
ip, IMethodData md, System.Boolean& unreachable) [0x00000]
--
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