Emit warnings/errors to the compilation instance

Avoids duplication of warnings. Resolves #78

1 files changed, 3 insertions, 2 deletions

diff --git a/src/Psc.js b/src/Psc.js
index 8fe8437..4991d5f 100644
--- a/src/Psc.js
+++ b/src/Psc.js
@@ -33,8 +33,9 @@ function compile(psModule) {
 
     const compilation = spawn(options.psc, args)
 
-    compilation.stdout.on('data', data => stderr.push(data.toString()))
-    compilation.stderr.on('data', data => stderr.push(data.toString()))
+    compilation.stderr.on('data', data => {
+      stderr.push(data.toString());
+    });
 
     compilation.on('close', code => {
       debug('finished compiling PureScript.')