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Created attachment 20781 [details]
$ git clone email@example.com:mono/msbuild.git
# xplat-master branch
$ ./cibuild.sh --scope Test --host Mono --target Mono
The above crashes while trying to run tests with xunit:
(partial trace here, full output log attached):
at (wrapper managed-to-native) System.Runtime.Remoting.Proxies.RealProxy.InternalGetProxyType (object) <0x00012>
at System.Runtime.Remoting.Proxies.RealProxy.GetProxiedType () [0x00027] in <6ee31efbdbd54ef9b1eb26def1af9a98>:0
at System.Runtime.Remoting.Proxies.RemotingProxy.CanCastTo (System.Type,object) [0x00059] in <6ee31efbdbd54ef9b1eb26def1af9a98>:0
at (wrapper runtime-invoke) <Module>.runtime_invoke_bool__this___object_object (object,intptr,intptr,intptr) [0x00059] in <6ee31efbdbd54ef9b1eb26def1af9a98>:0
frame #3: 0x002226b9 mono`mono_arch_handle_altstack_exception(sigctx=<unavailable>, siginfo=<unavailable>, fault_addr=<unavailable>, stack_ovf=0) + 169 at exceptions-x86.c:1115 [opt]
frame #4: 0x001058d2 mono`mono_sigsegv_signal_handler(_dummy=<unavailable>, _info=<unavailable>, context=<unavailable>) + 482 at mini-runtime.c:2857 [opt]
frame #5: 0x9f98eebb libsystem_platform.dylib`_sigtramp + 43
frame #6: 0x00248433 mono`mono_class_from_mono_type(type=0x0000006c) + 19 at class.c:6319 [opt]
frame #7: 0x00345d93 mono`mono_type_get_object_checked(domain=0x78fb4090, type=0x0000006c, error=<unavailable>) + 51 at reflection.c:451 [opt]
frame #8: 0x002786dc mono`ves_icall_Remoting_RealProxy_InternalGetProxyType(tp=0x00959580) + 44 at icall.c:6391 [opt]
EXEC : error : (i386) /Library/Frameworks/Mono.framework/Versions/4.9.3/lib/mono/4.5/mscorlib.dll.dylib empty dSYM file detected, dSYM was created with an executable with no debug info. [/Users/ankit/dev/msbuild/src/Framework.UnitTests/Microsoft.Build.Framework.UnitTests.csproj]
This is with mono 22.214.171.124 from the 2017-02 branch, built on wrench few hours back (06060e29).
Full output log is attached.
This works fine with mono 126.96.36.1990 .
I was getting the same result with a recent 4.9.4.x, but I didn't try the latest from master.
Created attachment 20782 [details]
I'm getting the same thing with 188.8.131.52
So somehow ves_icall_Remoting_RealProxy_InternalGetProxyType is being called with a System.String as the argument. Some printf debugging (https://gist.github.com/lambdageek/147b5a92be3febc8be2dfa08052255f4) shows
$ ../mono/mono/mini/mono /Users/alekseyk/work/msbuild/packages/xunit.runn
category=nonosxtests -notrait category=non-mono-tests -notrait category=mono-o
sx-failing -noshadow -parallel none -xml /Users/alekseyk/work/msbuild/bin/Debug
ml -html /Users/alekseyk/work/msbuild/bin/Debug-MONO/OSX_Deployment_Test/Micros
xUnit.net Console Runner (64-bit .NET 4.0.30319.42000)
tp class is System.String
tp is 0x102dec8e0
remote_class is 0x62006d00650073
(and then it crashes trying to print the tp->remote_class->proxy_class).
So someone is creating a RealProxy instance with __objTP set to a string instead of a proxy.
Ugh. mono_object_handle_isinst_mbyref calls mono_runtime_invoke_checked (..., rp, ..., ...) when it should be mono_runtime_invoked_checked (..., MONO_HANDLE_RAW (rp), ..., ...)
Easy fix, but now I'm worried that I made the same mistake elsewhere.
Reassigning to you since I'm out of time on babysitting the Jenkins builds.
PR against 2017-02 https://github.com/mono/mono/pull/4592
(msbbuild passes unit tests on my machine with this PR applies)
PR against master https://github.com/mono/mono/pull/4594
Merged to 2017-02 as of df9df437aee0d67a64744db1c5a28ca805b0644d
Reopening and sending to Aleksey because we want to add an automated test.
…correction: Closing as fixed and opening #55341 to track the need for a test.
as per #comment 8 , Could you please mark this bug as verified/close. There is Bug#55341 has been created and it is New Status.