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diff --git a/src/shims/fs.rs b/src/shims/fs.rs
index e7d41b36f5a6afc57e0b63eb45097fa51783cf47..ea0b998c2e3dcdd270557ffda801719972dea8a2 100644 (file)
--- a/src/shims/fs.rs
+++ b/src/shims/fs.rs
@@ -1084,6 +1084,7 @@ fn ftruncate64(
                     Ok(-1)
                 }
             } else {
+                // The file is not writable
                 let einval = this.eval_libc("EINVAL")?;
                 this.set_last_error(einval)?;
                 Ok(-1)