Trying to fix failures in build-mac tests

.circleci/config.yml

@@ -91,6 +91,9 @@ jobs:
           command: |
             export PATH="`pwd`/cmake-3.4.1-Darwin-x86_64/CMake.app/Contents/bin:$PATH"
             export PATH="$HOME/.cargo/bin:$PATH"
+            # We increase the ulimit for fixing cargo unclosed files in mac
+            ulimit -n 8000
+            sudo sysctl -w kern.maxfiles=655360 kern.maxfilesperproc=327680
             make test
             make lint
       - run:

src/apis/emscripten/syscalls.rs

@@ -852,15 +852,6 @@ pub extern "C" fn ___syscall197(
     0
 }
 
-// /// fcntl64
-// pub extern "C" fn ___syscall221(_which: c_int, mut varargs: VarArgs, instance: &mut Instance) -> c_int {
-//     debug!("emscripten::___syscall221");
-//     let fd: i32 = varargs.get(instance);
-//     let cmd: i32 = varargs.get(instance);
-//     debug!("fd: {}, cmd: {}", fd, cmd);
-//     unsafe { fcntl(fd, cmd) }
-// }
-
 // getgid
 pub extern "C" fn ___syscall201() -> gid_t {
     debug!("emscripten::___syscall201 (getgid)");

src/bin/wasmer.rs

@@ -43,6 +43,8 @@ fn read_file_contents(path: &PathBuf) -> Result<Vec<u8>, io::Error> {
     let mut buffer: Vec<u8> = Vec::new();
     let mut file = File::open(path)?;
     file.read_to_end(&mut buffer)?;
+    // We force to close the file
+    drop(file);
     Ok(buffer)
 }