PaperMC/paper-server/patches/sources/com/mojang/brigadier/tree/LiteralCommandNode.java.patch

--- a/com/mojang/brigadier/tree/LiteralCommandNode.java
+++ b/com/mojang/brigadier/tree/LiteralCommandNode.java
@@ -23,11 +_,19 @@
 public class LiteralCommandNode<S> extends CommandNode<S> {
     private final String literal;
     private final String literalLowerCase;
+    private final String nonPrefixed; // Paper - prioritize mc commands in function parsing
 
     public LiteralCommandNode(final String literal, final Command<S> command, final Predicate<S> requirement, final CommandNode<S> redirect, final RedirectModifier<S> modifier, final boolean forks) {
         super(command, requirement, redirect, modifier, forks);
         this.literal = literal;
         this.literalLowerCase = literal.toLowerCase(Locale.ROOT);
+        // Paper start - prioritize mc commands in function parsing
+        if (literal.startsWith("minecraft:")) {
+            this.nonPrefixed = literal.substring("minecraft:".length());
+        } else {
+            this.nonPrefixed = null;
+        }
+        // Paper end - prioritize mc commands in function parsing
     }
 
     public String getLiteral() {
@@ -42,7 +_,12 @@
     @Override
     public void parse(final StringReader reader, final CommandContextBuilder<S> contextBuilder) throws CommandSyntaxException {
         final int start = reader.getCursor();
-        final int end = parse(reader);
+        // Paper start - prioritize mc commands in function parsing
+        int end = parse(reader, false);
+        if (end == -1 && this.nonPrefixed != null) {
+            end = parse(reader, true);
+        }
+        // Paper end - prioritize mc commands in function parsing
         if (end > -1) {
             contextBuilder.withNode(this, StringRange.between(start, end));
             return;
@@ -51,7 +_,10 @@
         throw CommandSyntaxException.BUILT_IN_EXCEPTIONS.literalIncorrect().createWithContext(reader, literal);
     }
 
-    private int parse(final StringReader reader) {
+    // Paper start - prioritize mc commands in function parsing
+    private int parse(final StringReader reader, final boolean secondPass) {
+        String literal = secondPass ? this.nonPrefixed : this.literal;
+        // Paper end - prioritize mc commands in function parsing
         final int start = reader.getCursor();
         if (reader.canRead(literal.length())) {
             final int end = start + literal.length();
@@ -78,7 +_,7 @@
 
     @Override
     public boolean isValidInput(final String input) {
-        return parse(new StringReader(input)) > -1;
+        return parse(new StringReader(input), false) > -1; // Paper - prioritize mc commands in function parsing
     }
 
     @Override