Fix incorrect minimum read length. (#5353)

1 files changed, 2 insertions, 6 deletions

diff --git a/io.c b/io.c
index deb5a7950e..3fab54e406 100644
--- a/io.c
+++ b/io.c
@@ -1133,14 +1133,10 @@ rb_read_internal(rb_io_t *fptr, void *buf, size_t count)
 {
     VALUE scheduler = rb_fiber_scheduler_current();
     if (scheduler != Qnil) {
-        VALUE result = rb_fiber_scheduler_io_read_memory(scheduler, fptr->self, buf, count, count);
+        VALUE result = rb_fiber_scheduler_io_read_memory(scheduler, fptr->self, buf, count, 0);
 
         if (result != Qundef) {
-            ssize_t length = rb_fiber_scheduler_io_result_apply(result);
-
-            if (length < 0) rb_sys_fail_path(fptr->pathv);
-
-            return length;
+            return rb_fiber_scheduler_io_result_apply(result);
         }
     }