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-rw-r--r--process.cpp6
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);