1 files changed, 10 insertions, 11 deletions
diff --git a/lib/impure/rdstdin.nim b/lib/impure/rdstdin.nim
index c580b89d1..f4fc26380 100644
--- a/lib/impure/rdstdin.nim
+++ b/lib/impure/rdstdin.nim
@@ -22,11 +22,16 @@ runnableExamples("-r:off"):
     if line.len > 0: echo line
   echo "exiting"
 
+
 when defined(windows):
+  when defined(nimPreviewSlimSystem):
+    import std/syncio
+
   proc readLineFromStdin*(prompt: string): string {.
                           tags: [ReadIOEffect, WriteIOEffect].} =
     ## Reads a line from stdin.
     stdout.write(prompt)
+    stdout.flushFile()
     result = readLine(stdin)
 
   proc readLineFromStdin*(prompt: string, line: var string): bool {.
@@ -50,17 +55,7 @@ elif defined(genode):
     stdin.readLine(line)
 
 else:
-  import linenoise
-
-  proc readLineFromStdin*(prompt: string): string {.
-                          tags: [ReadIOEffect, WriteIOEffect].} =
-    var buffer = linenoise.readLine(prompt)
-    if isNil(buffer):
-      raise newException(IOError, "Linenoise returned nil")
-    result = $buffer
-    if result.len > 0:
-      historyAdd(buffer)
-    linenoise.free(buffer)
+  import std/linenoise
 
   proc readLineFromStdin*(prompt: string, line: var string): bool {.
                           tags: [ReadIOEffect, WriteIOEffect].} =
@@ -73,3 +68,7 @@ else:
       historyAdd(buffer)
     linenoise.free(buffer)
     result = true
+
+  proc readLineFromStdin*(prompt: string): string {.inline.} =
+    if not readLineFromStdin(prompt, result):
+      raise newException(IOError, "Linenoise returned nil")