grub-probe crashes in 2.00, not in 1.99

[Lluís Batlle i Rossell]

Hello,

I've an x86_64-linux system, without EFI, and grub 2.00 grub-probe crashes, if
it has a non-existant device.map (/tmp/device.map does not exist):

address@hidden:/nix/var/nix/profiles/system-130-link]# sw/sbin/grub-probe -m
/tmp/device.map /boot
reiserfs
*** glibc detected *** sw/sbin/grub-probe: double free or corruption (fasttop):
0x0000000000cc2290 ***
Aborted

The backtrace without debug info:
....
#5  0x000000000049d466 in grub_free ()
#6  0x00000000004ae3bc in free_array ()
#7  0x00000000004ae546 in grub_mod_fini ()
#8  0x00000000004ae531 in grub_diskfilter_fini ()
#9  0x0000000000408528 in grub_fini_all ()
#10 0x00000000004050d2 in main ()

If I run it from another directory, with full path, it does not:
address@hidden:/etc/nixos/nixpkgs]# 
/nix/var/nix/profiles/system-130-link/sw/sbin/grub-probe -m /tmp/device.map 
/boot
reiserfs


It does not happen with grub 1.99. For more information:
The device.map built by 1.99 is:
(hd0)   /dev/disk/by-id/ata-MAXTOR_STM3250310AS_6RY26Q2Z
(hd1)   /dev/disk/by-id/ata-ST3320613AS_9SZ50W76
(hd2)   /dev/disk/by-id/ata-ST3320613AS_9SZ3MZ4S

It does not happen either, if the device.map grub-probe finds has the contents
above.

I care about the former run to work, because it makes grub-install fail.

The partition holding /boot is a reiserfs over a md raid1 array:
Mount:
/dev/md127 on / type reiserfs (rw,relatime)

mdstat:
md126 : active raid1 sda2[0] sdb2[1]
      524276 blocks super 1.2 [2/2] [UU]

Any idea?
Meanwhile I keep on using 1.99.

Thank you,
Lluís.