Re: git grep broken in Fedora 21 update?

[Michael J Gruber <git@drmicha.warpmail.net>]

Jacob Keller venit, vidit, dixit 04.09.2015 06:55:
> On Thu, Sep 3, 2015 at 5:04 PM, Rustad, Mark D <mark.d.rustad@intel.com> wrote:
>> I just found a case where grep and git grep yield different results. Inside the ixgbe directory of the Linux kernel I did:
>>
>> $ grep enter_lplu *.[ch]
>>
>> And got the following:
>>
>> ixgbe_main.c:   if (adapter->hw.phy.ops.enter_lplu) {
>> ixgbe_main.c:           adapter->hw.phy.ops.enter_lplu(&adapter->hw);
>> ixgbe_type.h:   s32 (*enter_lplu)(struct ixgbe_hw *);
>> ixgbe_x550.c:/** ixgbe_enter_lplu_x550em - Transition to low power states
>> ixgbe_x550.c:static s32 ixgbe_enter_lplu_t_x550em(struct ixgbe_hw *hw)
>> ixgbe_x550.c:                   phy->ops.enter_lplu = ixgbe_enter_lplu_t_x550em;
>>
>> But when I did:
>>
>> $ git grep enter_lplu
>>
>> I got:
>>
>> ixgbe_main.c:   if (adapter->hw.phy.ops.enter_lplu) {
>> ixgbe_main.c:           adapter->hw.phy.ops.enter_lplu(&adapter->hw);
>> ixgbe_type.h:   s32 (*enter_lplu)(struct ixgbe_hw *);
>> ixgbe_x550.c:/** ixgbe_enter_lplu_x550em - Transition to low power states
>> ixgbe_x550.c:static s32 ixgbe_enter_lplu_t_x550em(struct ixgbe_hw *hw)
>>
>> You can see that git grep missed the line in ixgbe_x550.c that had two hits on the string.
>>
>> This was with git 2.1.0 in Fedora 21. I use git grep a lot and never noticed a problem before. I just updated my Fedora 21 system yesterday, so I have to figure that has something to do with it. I checked and git didn't get updated, so I figure it must be a library that is really broken.
>>
>> I see in my update log that pcre was updated to:
>>
>> pcre.x86_64 0:8.35-12.fc21
>> pcre-devel.x86_64 0:8.35-12.fc21
>>
>> Yet the grep command is unaffected.
>>
>> --
>> Mark Rustad, Networking Division, Intel Corporation
>>
> 
> I don't know if command line grep uses pcre?
> 
> Does git-grep by default ignore changes not yet committed? That was my
> first thought but I am not very familiar with the tool.
> 
> Regards,
> Jake
> 

Can you downgrade pcre and check whether that's the reason?

Also, -14 in testing contains a few fixes.

Michael