Bug 45774 - Wrong scopes in .mdb in case of foreach loop
Summary: Wrong scopes in .mdb in case of foreach loop
Alias: None
Product: Compilers
Classification: Mono
Component: C# ()
Version: unspecified
Hardware: PC Mac OS
: High normal
Target Milestone: 4.8.0 (C9)
Assignee: Marek Safar
Depends on:
Reported: 2016-10-21 04:52 UTC by David Karlaš
Modified: 2017-01-03 11:40 UTC (History)
2 users (show)

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

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Description David Karlaš 2016-10-21 04:52:06 UTC
This method: https://github.com/xamarin/md-addins/blob/9a381a845694bffc417acd307a22ad43bc3fcc9f/MonoDevelop.MonoDroid/Xamarin.AndroidDesigner/Xamarin.AndroidDesigner/LayoutInfo.cs#L198-L208
Produces this mdbdump.exe output: https://gist.github.com/DavidKarlas/9c4c970c2f8ba8be6302fda8575e9895
It seems to me that "problem" variable should have scope_ref="3" and "itemData" variable should have scope_ref="4"

This is maybe related to missing il_index="3"?
Comment 1 Marek Safar 2016-10-21 15:46:35 UTC
This is by design scope_ref="1" means scope with index 2
Comment 2 David Karlaš 2016-10-23 04:30:22 UTC
I'm now confident this is mcs.exe bug. I have new sample: https://gist.github.com/DavidKarlas/b3e2cef574d390253bee554c2e3c55a6
"item2" variable is totally off. Either with index=4 or index=5. Also there is way too many scopes.
Comment 3 Marek Safar 2016-11-04 15:08:41 UTC
Fixed in master and Mono 4.8
Comment 5 David Karlaš 2016-12-31 11:59:32 UTC
Place breakpoints on all Console.WriteLine() lines and inspect values of item1 and item2 are correct.