Avoid an error if the compiler fails to execute during version check

1 files changed, 5 insertions, 4 deletions

diff --git a/lib/compile-handler.js b/lib/compile-handler.js
index 1cbde43f4..f2f567b0c 100644
--- a/lib/compile-handler.js
+++ b/lib/compile-handler.js
@@ -80,10 +80,11 @@ function CompileHandler(gccProps, compilerProps) {
                         logger.debug(compiler.id + " is unchanged");
                         return cached;
                     }
-                    return this.factories[type](compiler, this.compilerEnv).then(function (compiler) {
-                        compiler.mtime = res.mtime;
-                        return compiler;
-                    });
+                    return this.factories[type](compiler, this.compilerEnv)
+                        .then(function (compiler) {
+                            if (compiler) compiler.mtime = res.mtime;
+                            return compiler;
+                        });
                 }, this))
                 .catch(function (err) {
                     logger.warn("Unable to stat compiler binary", err);