Assertion failed (idxp->pfc) at file 'fat_ops.c', line 295.

[Jakub Jermář]

Running changeset:lp:~jakub/helenos/fs,165, which was merged into changeset:mainline,625 I occasionally hit the following assertion:

  Assertion failed (idxp->pfc) at file 'fat_ops.c', line 295.

when unlinking a file which is being written to (using the setup from ticket #255 + unlinking the large file at some point).

[Jakub Jermář]

The corresponding line in fat_ops.c is from the beginning of fat_node_get_core():

       /*
         * We must instantiate the node from the file system.
         */

        assert(idxp->pfc);

        rc = fat_node_get_new(&nodep);
        ...

[Jakub Jermář]

Kernel console displaying the stack trace.

[Jakub Jermář]

I have attached files required to reconstruct the whole stack trace.
From the stack trace, the calling sequence is:

fat_write() → fat_node_get_core() → assert()

[Jakub Jermář]

I cannot reproduce this after jakub@…, so hopefully the root cause is the same. Closing as a duplicate.