Crashes on older version of Mono (5.4.1.6)

[cristianst85]

Hello.

I don't think it's an issue with this library, but somewhere with System.Text.Json.JsonSerializer or System.MemoryExtensions (according to the stacktrace). Somewhat similar with #92. When running against an older version of Mono (5.4.1.6) on openSUSE 13.1 (i586), the application is just simply crashing. I am targeting .NET Framework 4.6.2 and using TimeZoneNames 6.0.0 which pulls a bunch of System dependencies. The code to reproduce the issue can be found at https://github.com/cristianst85/TimeZoneNamesMonoCrashRepro.

So when I run mono MonoCrashRepro.exe the output is:
* Assertion at local-propagation.c:562, condition `ins->opcode > MONO_CEE_LAST' not met

Stacktrace:

  at <unknown> <0xffffffff>
  at System.MemoryExtensions..cctor () [0x00000] in <16786cfd571c4686983021cfcee42fb4>:0
  at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) [0x0001e] in <f32220dd56b1417e9348b8f00e0470d2>:0
  at <unknown> <0xffffffff>
  at System.Text.Json.JsonSerializer..cctor () [0x00042] in <8658d3c3741d44a483829174064a9ad2>:0
  at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) [0x0001e] in <f32220dd56b1417e9348b8f00e0470d2>:0
  at <unknown> <0xffffffff>
  at TimeZoneNames.TimeZoneData.Load () [0x0002d] in <17b726522d9d422896f853b719c0f1d2>:0
  at TimeZoneNames.TZNames..cctor () [0x00000] in <17b726522d9d422896f853b719c0f1d2>:0
  at (wrapper runtime-invoke) object.runtime_invoke_void (object,intptr,intptr,intptr) [0x0001e] in <f32220dd56b1417e9348b8f00e0470d2>:0
  at <unknown> <0xffffffff>
  at MonoCrashRepro.Extensions.DateTimeExtensions.GetCurrentTimeZoneAbbreviation (System.DateTime,string) [0x0000d] in <b1f6b0cd71374a88ab3a45b4ad97a451>:0
  at MonoCrashRepro.Program.Main (string[]) [0x00006] in <b1f6b0cd71374a88ab3a45b4ad97a451>:0
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) [0x0004e] in <b1f6b0cd71374a88ab3a45b4ad97a451>:0

FullStacktraceOutput.txt

On another system (openSUSE 15.4 (amd64)) which has a newer version of Mono (6.8.0.105) the code runs just fine.
So currently I am stuck using an older version of TimeZoneNames (5.0.1) as updating Mono on the first system is not really an option. I am not even sure where to report this. Maybe to https://github.com/dotnet/runtime?

Thank you,
Cristian S.

[jnyrup]

This seems to hit the same issue as reported in dotnet/android#1177
The bugzilla links in there are dead now, so can't follow them.
From mono/mono#6242 it seems the underlying problem was fixed in mono 5.8.

[mattjohnsonpint]

I've updated the dependencies in version 7.0.0, so you could try again if you like. I'm not really interested in hunting this down further though to support older Mono. If it's something simple, a PR would be welcome though.

Thanks.