I am getting the same error for 7 tests Introduction/Hangman/Finish the game

[edutools-service]

I am unsure what the error message is (see below) and why I am getting it.

fun safeUserInput():Char{ var input = "" var correctInput = false while (correctInput){ println("Please, input your guess.") input = safeReadLine() if (input!=null&&input.isNotEmpty()) { correctInput = isCorrectInput(input) } } return input.first().uppercaseChar() }

fun isCorrectInput(guess: String):Boolean{ if (guess.length!=1){ println("The length of your guess should be 1! Try again.") return false } if (!guess.first().isLetter() ){ println("You should input only English letters! Try again.") return false } return true } Char sequence is empty. java.util.NoSuchElementException: Char sequence is empty. at kotlin.text.StringsKt___StringsKt.first(_Strings.kt:72) at MainKt.safeUserInput(Main.kt:29) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at org.jetbrains.academy.test.system.MethodUtilsKt.invokeWithArgs(MethodUtils.kt:22) at org.jetbrains.academy.test.system.MethodUtilsKt.invokeWithoutArgs(MethodUtils.kt:10) at org.jetbrains.academy.test.system.MethodUtilsKt.invokeWithoutArgs$default(MethodUtils.kt:6) at Test.testSafeUserInputImplementation(Tests.kt:88) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) (etc...)

educational_plugin FAILED + Char sequence is empty.

Test > testSolution() FAILED java.util.NoSuchElementException at Tests.kt:133

educational_plugin FAILED + Char sequence is empty.

Test > testGameImitation() FAILED java.util.NoSuchElementException at Tests.kt:141

educational_plugin FAILED + Char sequence is empty.

Test > testSafeUserInputImplementation(List, char) > Test.testSafeUserInputImplementation(List, char)[1] FAILED java.util.NoSuchElementException at Tests.kt:88

educational_plugin FAILED + Char sequence is empty.

Test > testSafeUserInputImplementation(List, char) > Test.testSafeUserInputImplementation(List, char)[2] FAILED java.util.NoSuchElementException at Tests.kt:88

educational_plugin FAILED + Char sequence is empty.

Test > testSafeUserInputImplementation(List, char) > Test.testSafeUserInputImplementation(List, char)[3] FAILED java.util.NoSuchElementException at Tests.kt:88

educational_plugin FAILED + Char sequence is empty.

Test > testSafeUserInputImplementation(List, char) > Test.testSafeUserInputImplementation(List, char)[4] FAILED java.util.NoSuchElementException at Tests.kt:88

educational_plugin FAILED + Char sequence is empty.

Test > testSafeUserInputImplementation(List, char) > Test.testSafeUserInputImplementation(List, char)[5] FAILED java.util.NoSuchElementException at Tests.kt:88 25 tests completed, 7 failed FAILURE: Build failed with an exception.

[pkiefel]

I have sorted this issue. Missing a not (!) in the while.