2 files changed, 4 insertions, 3 deletions
diff --git a/io.c b/io.c
index 07c678f855..5a27e8bfa9 100644
--- a/io.c
+++ b/io.c
@@ -9014,6 +9014,7 @@ rb_f_backquote(VALUE obj, VALUE str)
     GetOpenFile(port, fptr);
     result = read_all(fptr, remain_size(fptr), Qnil);
     rb_io_close(port);
+    RFILE(port)->fptr = NULL;
     rb_io_fptr_finalize(fptr);
     rb_gc_force_recycle(port); /* also guards from premature GC */
 
diff --git a/version.h b/version.h
index e5831be101..1f1bca908b 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.6.3"
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 62
+#define RUBY_PATCHLEVEL 63
 
 #define RUBY_RELEASE_YEAR 2019
-#define RUBY_RELEASE_MONTH 4
-#define RUBY_RELEASE_DAY 16
+#define RUBY_RELEASE_MONTH 6
+#define RUBY_RELEASE_DAY 13
 
 #include "ruby/version.h"