A few useful error logs in process.cpp

1 files changed, 5 insertions, 1 deletions

diff --git a/process.cpp b/process.cpp
index cab5484..d245449 100644
--- a/process.cpp
+++ b/process.cpp
@@ -111,7 +111,10 @@ bool Process::writeLine(const string_view line) {
 }
 
 optional<string> Process::readLine() {
-	if (pid == -1) return nullopt;
+	if (pid == -1) {
+		cerr << "-- readLine on pid==-1 --" << endl;
+		return nullopt;
+	}
 
 	size_t idx = readBuf.find('\n');
 	if (idx != string::npos) {
@@ -129,6 +132,7 @@ optional<string> Process::readLine() {
 			return nullopt;
 		}
 		if (nr == 0) {  // EOF
+			cerr << "-- eof in readLine --" << endl;
 			return nullopt;
 		}
 		s.resize(nr);