Use fd stat if possible to get mtime. Fixes #5073.

headius · headius · commit e2f93866b3d2 · 2018-03-19T16:42:43.000-05:00
diff --git a/core/src/main/java/org/jruby/RubyFile.java b/core/src/main/java/org/jruby/RubyFile.java
@@ -438,7 +438,7 @@ public IRubyObject lstat(ThreadContext context) {
     @JRubyMethod
     public IRubyObject mtime(ThreadContext context) {
         checkClosed(context);
-        return context.runtime.newFileStat(getPath(), false).mtime();
+        return ((RubyFileStat) stat(context)).mtime();
     }
 
     @JRubyMethod(meta = true)

Original file line number	Diff line number	Diff line change
`@@ -438,7 +438,7 @@ public IRubyObject lstat(ThreadContext context) {`
`438`	`438`	`@JRubyMethod`
`439`	`439`	`public IRubyObject mtime(ThreadContext context) {`
`440`	`440`	`checkClosed(context);`
`441`		`- return context.runtime.newFileStat(getPath(), false).mtime();`
	`441`	`+ return ((RubyFileStat) stat(context)).mtime();`
`442`	`442`	`}`
`443`	`443`
`444`	`444`	`@JRubyMethod(meta = true)`