coding.c (detect_coding_iso_2022): Set coding->rejected correctly when an invalid escape sequence is found (Bug#18610).

1 files changed, 24 insertions, 6 deletions

diff --git a/src/coding.c b/src/coding.c
index 0337c0df60e..02e59286dc8 100644
--- a/src/coding.c
+++ b/src/coding.c
@@ -3073,8 +3073,13 @@ detect_coding_iso_2022 (struct coding_system *coding,
                   ONE_MORE_BYTE (c1);
                   if (c1 < ' ' || c1 >= 0x80
                       || (id = iso_charset_table[0][c >= ','][c1]) < 0)
-                    /* Invalid designation sequence.  Just ignore.  */
-                    break;
+                    {
+                      /* Invalid designation sequence.  Just ignore.  */
+                      if (c1 >= 0x80)
+                        rejected |= (CATEGORY_MASK_ISO_7BIT
+                                     | CATEGORY_MASK_ISO_7_ELSE);
+                      break;
+                    }
                 }
               else if (c == '$')
                 {
@@ -3088,16 +3093,29 @@ detect_coding_iso_2022 (struct coding_system *coding,
                       ONE_MORE_BYTE (c1);
                       if (c1 < ' ' || c1 >= 0x80
                           || (id = iso_charset_table[1][c >= ','][c1]) < 0)
-                        /* Invalid designation sequence.  Just ignore.  */
-                        break;
+                        {
+                          /* Invalid designation sequence.  Just ignore.  */
+                          if (c1 >= 0x80)
+                            rejected |= (CATEGORY_MASK_ISO_7BIT
+                                         | CATEGORY_MASK_ISO_7_ELSE);
+                          break;
+                        }
                     }
                   else
-                    /* Invalid designation sequence.  Just ignore it.  */
-                    break;
+                    {
+                      /* Invalid designation sequence.  Just ignore it.  */
+                      if (c >= 0x80)
+                        rejected |= (CATEGORY_MASK_ISO_7BIT
+                                     | CATEGORY_MASK_ISO_7_ELSE);
+                      break;
+                    }
                 }
               else
                 {
                   /* Invalid escape sequence.  Just ignore it.  */
+                  if (c >= 0x80)
+                    rejected |= (CATEGORY_MASK_ISO_7BIT
+                                 | CATEGORY_MASK_ISO_7_ELSE);
                   break;
                 }