bug#16433: Test case for newline cache corruption

[Ken Olum]

Here is some additional output which perhaps will be helpful.  I put
checks at the beginning and end of rmail-swap-buffers, and also
immediately before and after the call to buffer-swap-text.  I had these
checks print a message when the cache is OK, and print the character
positions on the cache is corrupted, giving the following.  Newlines are
absent from the cache starting with the one at position 952.

                                        Ken

----------------------------------------------------------------------
Counting messages...
know_region_cache (test.mbox, 351, 359, 1449)

Counting messages...done
know_region_cache ( *message-viewer test.mbox*, 7, 31, 1202)
know_region_cache ( *message-viewer test.mbox*, 70, 74, 1202)
know_region_cache (test.mbox, 1, 55, 1449)
know_region_cache (test.mbox, 56, 93, 1449)
know_region_cache (test.mbox, 94, 140, 1449)
know_region_cache (test.mbox, 141, 171, 1449)
know_region_cache (test.mbox, 172, 200, 1449)
know_region_cache (test.mbox, 201, 214, 1449)
know_region_cache (test.mbox, 215, 252, 1449)
know_region_cache (test.mbox, 253, 330, 1449)
know_region_cache (test.mbox, 331, 351, 1449)
know_region_cache (test.mbox, 361, 367, 1449)
know_region_cache (test.mbox, 368, 374, 1449)
know_region_cache (test.mbox, 375, 445, 1449)
know_region_cache (test.mbox, 446, 505, 1449)
know_region_cache (test.mbox, 506, 533, 1449)
know_region_cache (test.mbox, 534, 642, 1449)
know_region_cache (test.mbox, 643, 650, 1449)
know_region_cache (test.mbox, 651, 657, 1449)
know_region_cache (test.mbox, 658, 750, 1449)
know_region_cache (test.mbox, 751, 952, 1449)
know_region_cache (test.mbox, 953, 1053, 1449)
know_region_cache (test.mbox, 1054, 1145, 1449)
know_region_cache (test.mbox, 1146, 1232, 1449)
know_region_cache (test.mbox, 1233, 1324, 1449)
know_region_cache (test.mbox, 1325, 1416, 1449)
know_region_cache (test.mbox, 1417, 1431, 1449)
know_region_cache (test.mbox, 1432, 1439, 1449)
know_region_cache (test.mbox, 1440, 1447, 1449)

Cache OK in test.mbox at start of rmail-swap-buffers
know_region_cache ( *message-viewer test.mbox*, 1, 7, 1202)
know_region_cache ( *message-viewer test.mbox*, 32, 60, 1202)
know_region_cache ( *message-viewer test.mbox*, 61, 70, 1202)
know_region_cache ( *message-viewer test.mbox*, 75, 112, 1202)
know_region_cache ( *message-viewer test.mbox*, 114, 120, 1202)
know_region_cache ( *message-viewer test.mbox*, 121, 127, 1202)
know_region_cache ( *message-viewer test.mbox*, 128, 198, 1202)
know_region_cache ( *message-viewer test.mbox*, 199, 258, 1202)
know_region_cache ( *message-viewer test.mbox*, 259, 286, 1202)
know_region_cache ( *message-viewer test.mbox*, 287, 395, 1202)
know_region_cache ( *message-viewer test.mbox*, 396, 403, 1202)
know_region_cache ( *message-viewer test.mbox*, 404, 410, 1202)
know_region_cache ( *message-viewer test.mbox*, 411, 503, 1202)
know_region_cache ( *message-viewer test.mbox*, 504, 705, 1202)
know_region_cache ( *message-viewer test.mbox*, 706, 806, 1202)
know_region_cache ( *message-viewer test.mbox*, 807, 898, 1202)
know_region_cache ( *message-viewer test.mbox*, 899, 985, 1202)
know_region_cache ( *message-viewer test.mbox*, 986, 1077, 1202)
know_region_cache ( *message-viewer test.mbox*, 1078, 1169, 1202)
know_region_cache ( *message-viewer test.mbox*, 1170, 1184, 1202)
know_region_cache ( *message-viewer test.mbox*, 1185, 1192, 1202)
know_region_cache ( *message-viewer test.mbox*, 1193, 1200, 1202)

Cache OK in  *message-viewer test.mbox* at start of rmail-swap-buffers
Cache OK in test.mbox at right before swapping
Cache OK in  *message-viewer test.mbox* at right before swapping
Cache OK in test.mbox at right after swapping
Cache OK in  *message-viewer test.mbox* at right after swapping
Cache OK in test.mbox at end of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at end of rmail-swap-buffers
Cache OK in test.mbox at start of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at start of rmail-swap-buffers
Cache OK in test.mbox at right before swapping
Cache OK in  *message-viewer test.mbox* at right before swapping
Cache OK in test.mbox at right after swapping
Cache OK in  *message-viewer test.mbox* at right after swapping
Cache OK in test.mbox at end of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at end of rmail-swap-buffers
Getting mail from /old/home/kdo/test.in...
invalidate_region_cache (test.mbox, 361, 361, 1449) (revalidated)
invalidate_region_cache (test.mbox, 1449, 2014, 2014) (revalidated)

invalidate_region_cache (test.mbox, 2012, 2012, 2014)
invalidate_region_cache (test.mbox, 2030, 2030, 2032) (revalidated)
know_region_cache (test.mbox, 2012, 2030, 2034)
invalidate_region_cache (test.mbox, 2032, 2032, 2034) (revalidated)
know_region_cache (test.mbox, 2030, 2032, 2042)
invalidate_region_cache (test.mbox, 2040, 2040, 2042) (revalidated)
know_region_cache (test.mbox, 2032, 2040, 2043)

Counting new messages...done (1)
Saving file /home/kdo/test.mbox...
Wrote /home/kdo/test.mbox [2 times]
1 new message read
invalidate_region_cache (test.mbox, 2038, 2039, 2043) (revalidated)
invalidate_region_cache (test.mbox, 2038, 2038, 2042) (revalidated)
know_region_cache (test.mbox, 2038, 2039, 2043)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1202, 1202)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 1)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 1)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 2)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 3)
invalidate_region_cache ( *message-viewer test.mbox*, 39, 39, 41)
invalidate_region_cache ( *message-viewer test.mbox*, 68, 68, 70)
invalidate_region_cache ( *message-viewer test.mbox*, 82, 82, 84)
know_region_cache ( *message-viewer test.mbox*, 77, 81, 126)
know_region_cache ( *message-viewer test.mbox*, 88, 123, 126)
know_region_cache (test.mbox, 1449, 1503, 2043)
know_region_cache (test.mbox, 1504, 1543, 2043)
know_region_cache (test.mbox, 1544, 1581, 2043)
know_region_cache (test.mbox, 1582, 1628, 2043)
know_region_cache (test.mbox, 1629, 1687, 2043)
know_region_cache (test.mbox, 1688, 1760, 2043)
know_region_cache (test.mbox, 1761, 1835, 2043)
know_region_cache (test.mbox, 1836, 1873, 2043)
know_region_cache (test.mbox, 1874, 1902, 2043)
know_region_cache (test.mbox, 1903, 1916, 2043)
know_region_cache (test.mbox, 1917, 1969, 2043)
know_region_cache (test.mbox, 1970, 2011, 2043)

Cache OK in test.mbox at start of rmail-swap-buffers
know_region_cache ( *message-viewer test.mbox*, 1, 38, 126)
know_region_cache ( *message-viewer test.mbox*, 39, 67, 126)
know_region_cache ( *message-viewer test.mbox*, 68, 77, 126)
know_region_cache ( *message-viewer test.mbox*, 82, 88, 126)

Cache OK in  *message-viewer test.mbox* at start of rmail-swap-buffers
Cache OK in test.mbox at right before swapping
Cache OK in  *message-viewer test.mbox* at right before swapping
Cache OK in test.mbox at right after swapping
Cache OK in  *message-viewer test.mbox* at right after swapping
Cache OK in test.mbox at end of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at end of rmail-swap-buffers
Cache OK in test.mbox at start of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at start of rmail-swap-buffers
Cache OK in test.mbox at right before swapping
Cache OK in  *message-viewer test.mbox* at right before swapping
Cache OK in test.mbox at right after swapping
Cache OK in  *message-viewer test.mbox* at right after swapping
Cache OK in test.mbox at end of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at end of rmail-swap-buffers
invalidate_region_cache ( *message-viewer test.mbox*, 1, 126, 126)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 1)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 1)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 2)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 3)
invalidate_region_cache ( *message-viewer test.mbox*, 39, 39, 41)
invalidate_region_cache ( *message-viewer test.mbox*, 68, 68, 70)
invalidate_region_cache ( *message-viewer test.mbox*, 82, 82, 84)
know_region_cache ( *message-viewer test.mbox*, 77, 81, 126)
know_region_cache ( *message-viewer test.mbox*, 88, 123, 126)

Cache OK in test.mbox at start of rmail-swap-buffers
know_region_cache ( *message-viewer test.mbox*, 1, 38, 126)
know_region_cache ( *message-viewer test.mbox*, 39, 67, 126)
know_region_cache ( *message-viewer test.mbox*, 68, 77, 126)
know_region_cache ( *message-viewer test.mbox*, 82, 88, 126)

Cache OK in  *message-viewer test.mbox* at start of rmail-swap-buffers
Cache OK in test.mbox at right before swapping
Cache OK in  *message-viewer test.mbox* at right before swapping
Cache OK in test.mbox at right after swapping
Cache OK in  *message-viewer test.mbox* at right after swapping
Cache OK in test.mbox at end of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at end of rmail-swap-buffers
Cache OK in test.mbox at start of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at start of rmail-swap-buffers
Cache OK in test.mbox at right before swapping
Cache OK in  *message-viewer test.mbox* at right before swapping
Cache OK in test.mbox at right after swapping
Cache OK in  *message-viewer test.mbox* at right after swapping
Cache OK in test.mbox at end of rmail-swap-buffers
Cache OK in  *message-viewer test.mbox* at end of rmail-swap-buffers
invalidate_region_cache ( *message-viewer test.mbox*, 1, 126, 126)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 1)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 1)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 1089)
invalidate_region_cache ( *message-viewer test.mbox*, 1, 1, 1090)
invalidate_region_cache ( *message-viewer test.mbox*, 32, 32, 1121)
invalidate_region_cache ( *message-viewer test.mbox*, 61, 61, 1150)
invalidate_region_cache ( *message-viewer test.mbox*, 75, 75, 1164)
know_region_cache ( *message-viewer test.mbox*, 7, 31, 1202)
know_region_cache ( *message-viewer test.mbox*, 70, 74, 1202)
know_region_cache (test.mbox, 361, 367, 2043)
know_region_cache (test.mbox, 368, 374, 2043)
know_region_cache (test.mbox, 375, 445, 2043)
know_region_cache (test.mbox, 446, 505, 2043)
know_region_cache (test.mbox, 506, 533, 2043)
know_region_cache (test.mbox, 534, 642, 2043)
know_region_cache (test.mbox, 643, 650, 2043)
know_region_cache (test.mbox, 651, 657, 2043)
know_region_cache (test.mbox, 658, 750, 2043)
know_region_cache (test.mbox, 751, 926, 2043)
know_region_cache (test.mbox, 932, 933, 2043)
know_region_cache (test.mbox, 939, 940, 2043)
know_region_cache (test.mbox, 1010, 1011, 2043)
know_region_cache (test.mbox, 1070, 1071, 2043)
know_region_cache (test.mbox, 1098, 1099, 2043)
know_region_cache (test.mbox, 1207, 1208, 2043)
know_region_cache (test.mbox, 1215, 1216, 2043)
know_region_cache (test.mbox, 1222, 1223, 2043)
know_region_cache (test.mbox, 1315, 1316, 2043)

Newline cache corrupted in test.mbox at start of rmail-swap-buffers
Cache says [55 93 140 171 200 214 252 330 359 360 367 374 445 505 533 642 650 
657 750]
Truth is [55 93 140 171 200 214 252 330 359 360 367 374 445 505 533 642 650 657 
750 952 1053 1145 1232 1324 1416 1431 1439 1447 1448]