[Swift]
After changing the Swift dialet a lot of times, I guess even lower than 4.0, I'va passed sample tests, but running the whole testsuite I got this error: but I don't understand whether is a test error or is an issue somewhere in the code.
Did anybody face an issue like that ?

fatal error: Index out of range
Current stack trace:
0 libswiftCore.so 0x00007f6e6b1c86b0 swift_reportError + 120
1 libswiftCore.so 0x00007f6e6b1e30d0 _swift_stdlib_reportFatalError + 62
2 libswiftCore.so 0x00007f6e6afdccb6 + 1186998
3 libswiftCore.so 0x00007f6e6b13c39d + 2626461
4 libswiftCore.so 0x00007f6e6afdccb6 + 1186998
5 libswiftCore.so 0x00007f6e6b0f7410 specialized _fatalErrorMessage(StaticString, StaticString, file : StaticString, line : UInt, flags : UInt32) -> Never + 96
6 libswiftSwiftOnoneSupport.so 0x00007f6e6b488e40 specialized Array.subscript.getter + 124
7 test 0x00000000004087c3 + 34755
8 test 0x0000000000409c89 + 40073
9 test 0x000000000040a744 + 42820
10 test 0x000000000040aefa + 44794
11 test 0x0000000000409c01 + 39937
12 test 0x000000000040ae91 + 44689
13 libXCTest.so 0x00007f6e6b43148b + 287883
14 libXCTest.so 0x00007f6e6b407502 + 115970
15 libXCTest.so 0x00007f6e6b431440 + 287808
16 test 0x000000000040549b + 21659
17 libXCTest.so 0x00007f6e6b406b20 XCTestCase.invokeTest() -> () + 112
18 libXCTest.so 0x00007f6e6b426cd0 specialized XCTestCase.perform(XCTestRun) -> () + 313
19 libXCTest.so 0x00007f6e6b406a50 XCTestCase.perform(XCTestRun) -> () + 14
20 libXCTest.so 0x00007f6e6b404520 XCTest.run() -> () + 516
21 libXCTest.so 0x00007f6e6b427250 specialized XCTestSuite.perform(XCTestRun) -> () + 892
22 libXCTest.so 0x00007f6e6b404b40 XCTestSuite.perform(XCTestRun) -> () + 14
23 libXCTest.so 0x00007f6e6b404520 XCTest.run() -> () + 516
24 libXCTest.so 0x00007f6e6b427250 specialized XCTestSuite.perform(XCTestRun) -> () + 892
25 libXCTest.so 0x00007f6e6b427250 specialized XCTestSuite.perform(XCTestRun) -> () + 2007
26 libXCTest.so 0x00007f6e6b404520 XCTest.run() -> () + 557
27 test 0x0000000000404973 + 18803
28 test 0x00000000004097da + 38874
29 libc.so.6 0x00007f6e6913f740 __libc_start_main + 240
30 test 0x0000000000404549 + 17737