To reproduce:

1. Download and open attached "repro930252.zip" project.
2. Build and run for android device.
3. Press "Crash repro" button.
4. Observe the crash.

Expected result: Application shouldn't crash.
Actual result: Application crashes after button press.

Reproduced with: 2017.1.0f3, 5.6.2p3, 5.5.3p1
Not reproduced with: 2017.2.0b3, 5.5.3f1
Regression introduced in 5.5.3p1

Devices under test:

Google Nexus 5X*, OS:7.1.2, CPU:arm64-v8a, GPU:Adreno (TM) 418,
Build:google/bullhead/bullhead:7.1.2/N2G47W/3938523:user/release-keys

Verizon SM G930V*, OS:6.0.1, CPU:arm64-v8a, GPU:Adreno (TM) 530,
Build:Verizon/heroqltevzw/heroqltevzw:6.0.1/MMB29M/G930VVRU2APG3:user/release-keys

Samsung SM G800F (Galaxy S5 Mini)*, OS:6.0.1, CPU:armeabi-v7a, GPU:Mali-400 MP, Build:samsung/kminiltexx/kminilte:6.0.1/MMB29K/G800FXXU1CQA1:user/release-keys

IPadMini 4 10.3.2

Notes: Accessing RegionInfo class functions seem to trigger the crash. In the project there is AppStoreManager.GooglePlay.cs script which causes the crash. To be exact 81 line of that script seems to be the issue. If You comment it, crash does not appear anymore. Everything works well if built with Mono.

Verified with 2017.3.0a4