LibLine: Change get_line to return a Result<String, Error>

This fixes a bunch of FIXME's in LibLine.
Also handles the case where read() would read zero bytes in vt_dsr() and
effectively block forever by erroring out.

Fixes #2370

1 files changed, 7 insertions, 1 deletions

diff --git a/Applications/Debugger/main.cpp b/Applications/Debugger/main.cpp
index ded418d17a..203eab46c5 100644
--- a/Applications/Debugger/main.cpp
+++ b/Applications/Debugger/main.cpp
@@ -236,7 +236,13 @@ int main(int argc, char** argv)
         }
 
         for (;;) {
-            auto command = editor.get_line("(sdb) ");
+            auto command_result = editor.get_line("(sdb) ");
+
+            if (command_result.is_error())
+                return DebugSession::DebugDecision::Detach;
+
+            auto& command = command_result.value();
+
             bool success = false;
             Optional<DebugSession::DebugDecision> decision;