text-minimessage: Add stacktraces and more detail to legacy errors

text-minimessage/src/main/java/net/kyori/adventure/text/minimessage/ContextImpl.java

@@ -124,17 +124,17 @@ public UnaryOperator<Component> postProcessor() {
 
   @Override
   public @NotNull ParsingException newException(@NotNull final String message) {
-    return new ParsingExceptionImpl(message, this.message, null, EMPTY_TOKEN_ARRAY);
+    return new ParsingExceptionImpl(message, this.message, null, false, EMPTY_TOKEN_ARRAY);
   }
 
   @Override
   public @NotNull ParsingException newException(final @NotNull String message, final @NotNull ArgumentQueue tags) {
-    return new ParsingExceptionImpl(message, this.message, tagsToTokens(((ArgumentQueueImpl<?>) tags).args));
+    return new ParsingExceptionImpl(message, this.message, null, false, tagsToTokens(((ArgumentQueueImpl<?>) tags).args));
   }
 
   @Override
   public @NotNull ParsingException newException(final @NotNull String message, final @Nullable Throwable cause, final @NotNull ArgumentQueue tags) {
-    return new ParsingExceptionImpl(message, this.message, cause, tagsToTokens(((ArgumentQueueImpl<?>) tags).args));
+    return new ParsingExceptionImpl(message, this.message, cause, false, tagsToTokens(((ArgumentQueueImpl<?>) tags).args));
   }
 
   private static Token[] tagsToTokens(final List<? extends Tag.Argument> tags) {

text-minimessage/src/main/java/net/kyori/adventure/text/minimessage/internal/parser/ParsingExceptionImpl.java

@@ -40,6 +40,7 @@ public class ParsingExceptionImpl extends ParsingException {
 
   private final String originalText;
   private Token @NotNull [] tokens;
+  private final boolean withStackTrace;
 
   /**
    * Create a new parsing exception.
@@ -57,6 +58,7 @@ public ParsingExceptionImpl(
     super(message);
     this.tokens = tokens;
     this.originalText = originalText;
+    this.withStackTrace = false;
   }
 
   /**
@@ -65,18 +67,21 @@ public ParsingExceptionImpl(
    * @param message the detail message
    * @param originalText the original text which was parsed
    * @param cause the cause
+   * @param withStackTrace whether to generate a stacktrace
    * @param tokens the token which caused the error
    * @since 4.10.0
    */
   public ParsingExceptionImpl(
     final String message,
     final @Nullable String originalText,
     final @Nullable Throwable cause,
+    final boolean withStackTrace,
     final @NotNull Token @NotNull ... tokens
   ) {
     super(message, cause);
     this.tokens = tokens;
     this.originalText = originalText;
+    this.withStackTrace = withStackTrace;
   }
 
   @Override
@@ -142,7 +147,10 @@ private String arrow() {
   }
 
   @Override
-  public ParsingExceptionImpl fillInStackTrace() { // no stacktrace
+  public Throwable fillInStackTrace() {
+    if (this.withStackTrace) {
+      return super.fillInStackTrace();
+    }
     return this;
   }
 

text-minimessage/src/main/java/net/kyori/adventure/text/minimessage/internal/parser/TokenParser.java

@@ -158,12 +158,21 @@ public static void parseString(final String message, final MatchedTokenConsumer<
     final int length = message.length();
     for (int i = 0; i < length; i++) {
       final int codePoint = message.codePointAt(i);
-      if (codePoint == '§') {
-        throw new ParsingExceptionImpl(
-          "Legacy formatting codes have been detected in a component - this is unsupported behaviour. Please refer to the Adventure documentation (https://docs.adventure.kyori.net) for more information.",
-          message,
-          new Token(i, i + 2, TokenType.TEXT)
-        );
+      if (codePoint == '§' && i + 1 < length) {
+        final int nextChar = Character.toLowerCase(message.codePointAt(i + 1));
+        // Only throw an exception if the next character is actually going to make a legacy color code
+        if ((nextChar >= '0' && nextChar <= '9')
+          || (nextChar >= 'a' && nextChar <= 'f')
+          || nextChar == 'r'
+          || (nextChar >= 'k' && nextChar <= 'o')) {
+          throw new ParsingExceptionImpl(
+            "Legacy formatting codes have been detected in a MiniMessage string - this is unsupported behaviour. Please refer to the Adventure documentation (https://docs.adventure.kyori.net) for more information.",
+            message,
+            null,
+            true,
+            new Token(i, i + 2, TokenType.TEXT)
+          );
+        }
       }
 
       if (!Character.isBmpCodePoint(codePoint)) {