Bug 40501 - unicodeencodinggetpreamble.exe test from coreclr started failing after recent changes (possibly Array.Empty)
Summary: unicodeencodinggetpreamble.exe test from coreclr started failing after recent...
Alias: None
Product: Compilers
Classification: Mono
Component: C# ()
Version: 4.5.X
Hardware: All All
: --- normal
Target Milestone: ---
Assignee: Marek Safar
Depends on:
Reported: 2016-04-19 02:02 UTC by Alexander Köplinger [MSFT]
Modified: 2016-04-19 17:25 UTC (History)
1 user (show)

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

Working and failing binary (27.21 KB, application/zip)
2016-04-19 02:02 UTC, Alexander Köplinger [MSFT]

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Description Alexander Köplinger [MSFT] 2016-04-19 02:02:34 UTC
Created attachment 15759 [details]
Working and failing binary

The coreclr/tests/src/CoreMangLib/cti/system/text/unicodeencoding/unicodeencodinggetpreamble.cs in the acceptance-tests started failing in the following commit range: https://github.com/mono/mono/compare/9c9e9bf...e37b4bd

I suspect it is related to the Array.Empty optimization as the binary works fine if I compile it with a Mono 4.4 mcs and fails with a master mcs on a master runtime. I've attached the two binaries.
Comment 1 Marek Safar 2016-04-19 17:25:44 UTC
Fixed in master and 4.5