Fix rendering for icon-text-fit + data-driven text-size

src/symbol/quads.js

@@ -71,7 +71,7 @@ function getIconQuads(anchor: Anchor,
     if (layout['icon-text-fit'] !== 'none' && shapedText) {
         const iconWidth = (right - left),
             iconHeight = (bottom - top),
-            size = layout['text-size'] / 24,
+            size = layer.getLayoutValue('text-size', globalProperties, feature) / 24,
             textLeft = shapedText.left * size,
             textRight = shapedText.right * size,
             textTop = shapedText.top * size,

test/integration/render-tests/regressions/mapbox-gl-js#5631/style.json

@@ -0,0 +1,74 @@
+{
+  "version": 8,
+  "metadata": {
+    "test": {
+      "width": 64,
+      "height": 64
+    }
+  },
+  "sources": {
+    "geojson": {
+      "type": "geojson",
+      "data": {
+        "type": "FeatureCollection",
+        "features": [
+          {
+            "type": "Feature",
+            "properties": {
+              "name": "A",
+              "size": 12
+            },
+            "geometry": {
+              "type": "Point",
+              "coordinates": [
+                -10,
+                0
+              ]
+            }
+          },
+          {
+            "type": "Feature",
+            "properties": {
+              "name": "B",
+              "size": 24
+            },
+            "geometry": {
+              "type": "Point",
+              "coordinates": [
+                10,
+                0
+              ]
+            }
+          }
+        ]
+      }
+    }
+  },
+  "sprite": "local://sprites/icon-text-fit",
+  "glyphs": "local://glyphs/{fontstack}/{range}.pbf",
+  "layers": [
+    {
+      "id": "symbol",
+      "type": "symbol",
+      "source": "geojson",
+      "layout": {
+        "text-font": [
+          "Open Sans Semibold",
+          "Arial Unicode MS Bold"
+        ],
+        "text-field": [
+          "get",
+          "name"
+        ],
+        "text-size": [
+          "get",
+          "size"
+        ],
+        "icon-image": "label",
+        "icon-text-fit": "both",
+        "icon-ignore-placement": true,
+        "icon-allow-overlap": true
+      }
+    }
+  ]
+}