From a19bc73e70b246a3c29b74a49716875a5251141d Mon Sep 17 00:00:00 2001
From: Robin Malfait <malfait.robin@gmail.com>
Date: Thu, 7 Mar 2024 23:40:36 +0100
Subject: [PATCH] build `allValidCandidates` from all rawCandidates that are
 not invalid

---
 packages/tailwindcss/src/index.ts | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/packages/tailwindcss/src/index.ts b/packages/tailwindcss/src/index.ts
index 78579a5dc..40226ca73 100644
--- a/packages/tailwindcss/src/index.ts
+++ b/packages/tailwindcss/src/index.ts
@@ -192,33 +192,42 @@ export function compile(
     })
   }
 
-  let allCandidates = new Set(rawCandidates)
+  let allValidCandidates = new Set<string>()
+  for (let rawCandidate of rawCandidates) {
+    if (!invalidRawCandidates.has(rawCandidate)) {
+      allValidCandidates.add(rawCandidate)
+    }
+  }
   let compiledCss = toCss(ast)
 
   return {
     rebuild(newRawCandidates: string[]) {
-      // Detect all new candidates
-      let previousSize = allCandidates.size
+      // Add all new candidates unless we know that they are invalid.
+      let previousSize = allValidCandidates.size
       for (let candidate of newRawCandidates) {
         if (!invalidRawCandidates.has(candidate)) {
-          allCandidates.add(candidate)
+          allValidCandidates.add(candidate)
         }
       }
 
-      // If no new candidates were added, we can return the original CSS
-      if (previousSize === allCandidates.size) {
+      // If no new candidates were added, we can return the original CSS. This
+      // currently assumes that we only add new candidates and never remove any.
+      if (previousSize === allValidCandidates.size) {
         return compiledCss
       }
 
       if (tailwindUtilitiesNode) {
         let previousAstNodeCount = parsedAstNodes.size
-        let newNodes = compileCandidates(allCandidates, designSystem, {
+        let newNodes = compileCandidates(allValidCandidates, designSystem, {
           parsedVariants,
           parsedCandidates,
           parsedAstNodes,
           invalidRawCandidates,
         }).astNodes
 
+        // If no new ast nodes were generated, then we can return the original
+        // CSS. This currently assumes that we only add new ast nodes and never
+        // remove any.
         if (previousAstNodeCount === parsedAstNodes.size) {
           return compiledCss
         }