Do not suppress errors with -Xsuppress-version-warnings

#KT-48833 Fixed

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt

@@ -573,13 +573,11 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
             configureLanguageFeatures(collector)
         )
 
-        if (!suppressVersionWarnings) {
+        checkLanguageVersionIsStable(languageVersion, collector)
-            checkLanguageVersionIsStable(languageVersion, collector)
+        checkOutdatedVersions(languageVersion, apiVersion, collector)
-            checkOutdatedVersions(languageVersion, apiVersion, collector)
+        checkProgressiveMode(languageVersion, collector)
-            checkProgressiveMode(languageVersion, collector)
 
-            checkIrSupport(languageVersionSettings, collector)
+        checkIrSupport(languageVersionSettings, collector)
-        }
 
         checkPlatformSpecificSettings(languageVersionSettings, collector)
 
@@ -600,7 +598,7 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
     }
 
     private fun checkLanguageVersionIsStable(languageVersion: LanguageVersion, collector: MessageCollector) {
-        if (!languageVersion.isStable) {
+        if (!languageVersion.isStable && !suppressVersionWarnings) {
             collector.report(
                 CompilerMessageSeverity.STRONG_WARNING,
                 "Language version ${languageVersion.versionString} is experimental, there are no backwards compatibility guarantees for " +
@@ -619,7 +617,7 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
                             "please, use version ${supportedVersion!!.versionString} or greater."
                 )
             }
-            version.isDeprecated -> {
+            version.isDeprecated && !suppressVersionWarnings -> {
                 collector.report(
                     CompilerMessageSeverity.STRONG_WARNING,
                     "${versionKind.text} version ${version.versionString} is deprecated " +
@@ -640,7 +638,7 @@ abstract class CommonCompilerArguments : CommonToolArguments() {
     }
 
     private fun checkProgressiveMode(languageVersion: LanguageVersion, collector: MessageCollector) {
-        if (progressiveMode && languageVersion < LanguageVersion.LATEST_STABLE) {
+        if (progressiveMode && languageVersion < LanguageVersion.LATEST_STABLE && !suppressVersionWarnings) {
             collector.report(
                 CompilerMessageSeverity.STRONG_WARNING,
                 "'-progressive' is meaningful only for the latest language version (${LanguageVersion.LATEST_STABLE}), " +

compiler/testData/cli/jvm/kt48833_doNotSuppressVersionErrors.args

@@ -0,0 +1,6 @@
+$TESTDATA_DIR$/simple.kt
+-d
+$TEMP_DIR$
+-language-version
+1.0
+-Xsuppress-version-warnings

compiler/testData/cli/jvm/kt48833_doNotSuppressVersionErrors.out

@@ -0,0 +1,2 @@
+error: language version 1.0 is no longer supported; please, use version 1.3 or greater.
+COMPILATION_ERROR

compiler/tests-gen/org/jetbrains/kotlin/cli/CliTestGenerated.java

@@ -679,6 +679,11 @@ public class CliTestGenerated extends AbstractCliTest {
             runTest("compiler/testData/cli/jvm/kt22304.args");
         }
 
+        @TestMetadata("kt48833_doNotSuppressVersionErrors.args")
+        public void testKt48833_doNotSuppressVersionErrors() throws Exception {
+            runTest("compiler/testData/cli/jvm/kt48833_doNotSuppressVersionErrors.args");
+        }
+
         @TestMetadata("kt49209.args")
         public void testKt49209() throws Exception {
             runTest("compiler/testData/cli/jvm/kt49209.args");