fixes #15207 [backport:1.2]

lib/pure/terminal.nim

@@ -776,25 +776,20 @@ when defined(windows):
     ## ``true`` otherwise.
     password.string.setLen(0)
     stdout.write(prompt)
-    while true:
+    let hi = createFileA("CONIN$",
-      let c = getch()
+      GENERIC_READ or GENERIC_WRITE, 0, nil, OPEN_EXISTING, 0, 0)
-      case c.char
+    var mode = DWORD 0
-      of '\r', chr(0xA):
+    discard getConsoleMode(hi, addr mode)
-        break
+    let origMode = mode
-      of '\b':
+    const
-        # ensure we delete the whole UTF-8 character:
+      ENABLE_PROCESSED_INPUT = 1
-        var i = 0
+      ENABLE_ECHO_INPUT = 4
-        var x = 1
+    mode = (mode or ENABLE_PROCESSED_INPUT) and not ENABLE_ECHO_INPUT
-        while i < password.len:
+
-          x = runeLenAt(password.string, i)
+    discard setConsoleMode(hi, mode)
-          inc i, x
+    result = readLine(stdin, password)
-        password.string.setLen(max(password.len - x, 0))
+    discard setConsoleMode(hi, origMode)
-      of chr(0x0):
+    discard closeHandle(hi)
-        # modifier key - ignore - for details see
-        # https://github.com/nim-lang/Nim/issues/7764
-        continue
-      else:
-        password.string.add(toUTF8(c.Rune))
     stdout.write "\n"
 
 else: