Set default of --incompatible_disable_glob_tracking to true

RELNOTES: None.
PiperOrigin-RevId: 186470386
diff --git a/site/docs/skylark/backward-compatibility.md b/site/docs/skylark/backward-compatibility.md
index 6c0ab4f..2bd2608 100644
--- a/site/docs/skylark/backward-compatibility.md
+++ b/site/docs/skylark/backward-compatibility.md
@@ -209,7 +209,7 @@
 no user-visible impact.
 
 *   Flag: `--incompatible_disable_glob_tracking`
-*   Default: `false`
+*   Default: `true`
 
 
 ### Print statements
diff --git a/src/main/java/com/google/devtools/build/lib/packages/SkylarkSemanticsOptions.java b/src/main/java/com/google/devtools/build/lib/packages/SkylarkSemanticsOptions.java
index e901353..c3e0d82 100644
--- a/src/main/java/com/google/devtools/build/lib/packages/SkylarkSemanticsOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/packages/SkylarkSemanticsOptions.java
@@ -101,7 +101,7 @@
 
   @Option(
     name = "incompatible_disable_glob_tracking",
-    defaultValue = "false",
+    defaultValue = "true",
     category = "incompatible changes",
     documentationCategory = OptionDocumentationCategory.UNCATEGORIZED,
     effectTags = {OptionEffectTag.UNKNOWN},
diff --git a/src/main/java/com/google/devtools/build/lib/syntax/SkylarkSemantics.java b/src/main/java/com/google/devtools/build/lib/syntax/SkylarkSemantics.java
index d14a09c..c5dca8e 100644
--- a/src/main/java/com/google/devtools/build/lib/syntax/SkylarkSemantics.java
+++ b/src/main/java/com/google/devtools/build/lib/syntax/SkylarkSemantics.java
@@ -76,7 +76,7 @@
           .incompatibleBzlDisallowLoadAfterStatement(false)
           .incompatibleDepsetIsNotIterable(false)
           .incompatibleDepsetUnion(false)
-          .incompatibleDisableGlobTracking(false)
+          .incompatibleDisableGlobTracking(true)
           .incompatibleDisallowDictPlus(false)
           .incompatibleDisallowToplevelIfStatement(true)
           .incompatibleDisallowUncalledSetConstructor(true)