[GR-33046] Set rubyHomeTruffleFile every time in createContext()

PullRequest: truffleruby/2882

Author: eregon

src/main/java/org/truffleruby/RubyLanguage.java

@@ -214,7 +214,7 @@ private static final class ThreadLocalState {
 
     @CompilationFinal public LanguageOptions options;
     @CompilationFinal private String rubyHome;
-    @CompilationFinal private TruffleFile rubyHomeTruffleFile;
+    private TruffleFile rubyHomeTruffleFile;
 
     @CompilationFinal private AllocationReporter allocationReporter;
     @CompilationFinal public CoverageManager coverageManager;
@@ -421,6 +421,15 @@ public RubyContext createContext(Env env) {
             }
         }
 
+        // Set rubyHomeTruffleFile every time, as pre-initialized contexts use a different FileSystem
+        final String oldHome = this.rubyHome;
+        final String newHome = findRubyHome();
+        if (!Objects.equals(newHome, oldHome)) {
+            throw CompilerDirectives.shouldNotReachHere(
+                    "home changed for the same RubyLanguage instance: " + oldHome + " vs " + newHome);
+        }
+        setRubyHomeTruffleFile(env, newHome);
+
         LOGGER.fine("createContext()");
         Metrics.printTime("before-create-context");
         // TODO CS 3-Dec-16 need to parse RUBYOPT here if it hasn't been already?
@@ -677,6 +686,10 @@ public String getPathRelativeToHome(String path) {
 
     private void setRubyHome(Env env, String home) {
         rubyHome = home;
+        setRubyHomeTruffleFile(env, home);
+    }
+
+    private void setRubyHomeTruffleFile(Env env, String home) {
         rubyHomeTruffleFile = home == null ? null : env.getInternalTruffleFile(rubyHome);
     }