Bug 3893 - ILGenerator.Emit newobj argument validation
Summary: ILGenerator.Emit newobj argument validation
Alias: None
Product: Class Libraries
Classification: Mono
Component: mscorlib ()
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Bugzilla
Depends on:
Reported: 2012-03-13 18:46 UTC by Mikayla Hutchinson [MSFT]
Modified: 2016-02-25 14:22 UTC (History)
2 users (show)

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

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Description Mikayla Hutchinson [MSFT] 2012-03-13 18:46:16 UTC
ILGenerator.Emit (OpCodes.NewObj, arg) doesn't validate that arg is a ConstructorInfo. Passing in a Type instead results in a cryptic TypeLoadException when compiling the method, with no useful clues about the reason.
Comment 1 marcos.henrich 2016-02-25 14:22:24 UTC
As per the msdn docs ILGenerator.Emit (OpCode, Type), creates IL code with the specified opcode followed by a token of the given type, and it only throws an exception when the given type is null.

Currently mono, .NET, and CoreFX ILGenerator.Emit methods doesn't perform any kind of validation between opcodes and arguments used.

There are 17 overloads of ILGenerator.Emit and dozens of opcodes, validating all the possible combinations is not on the road map.