Buildbot failures on 10.11

[Christopher Jones]

> 
> The log says:
> 
> 
> xcrun: warning: cache file '/var/folders/b3/_c47r31s23q0mgj1jvy64bkw0000gp/T/xcrun_db' appears to be corrupted (21, 2090430, 327680); resetting it
>       cache: 0x10217d000
>       .magic: XR1L
>       .numEntries: 21
>       .strTableSize: 2090430
>       .entries: {
> xcrun: warning: cache file '/var/folders/b3/_c47r31s23q0mgj1jvy64bkw0000gp/T/xcrun_db' appears to be corrupted (21, 2090430, 327680); resetting it
>       cache: 0x106a9a000
>       .magic: XR1L
>       .numEntries: 21
>       .strTableSize: 2090430
>       .entries: {
> xcrun: warning: cache file '/var/folders/b3/_c47r31s23q0mgj1jvy64bkw0000gp/T/xcrun_db' appears to be corrupted (21, 2090430, 327680); resetting it
>       cache: 0x109d00000
>       .magic: XR1L
>       .numEntries: 21
>       .strTableSize: 2090430
>       .entries: {
> xcrun: warning: cache file '/var/folders/b3/_c47r31s23q0mgj1jvy64bkw0000gp/T/xcrun_db' appears to be corrupted (21, 2090430, 327680); resetting it
>       cache: 0x10e300000
>       .magic: XR1L
>       .numEntries: 21
>       .strTableSize: 2090430
>       .entries: {
> /usr/bin/mig: line 162: : command not found
> mig: fatal: "<no name yet>", line -1: no SubSystem declaration
> make[3]: *** [mach_startup.h] Error 1
> 
> 
> I'm not familiar with this error. I don't know what xcrun_db is (I presume it is used by xcrun), in what way it might be corrupt, or how that corruption might be fixed. Do you have any suggestions?

I think you need to clear out those temporary files, in some way, from /var/folders. Maybe try a simple reboot ??

> 
> Maybe it was corrupted because it was truncated because it could not be fully written because the disk was full; as you know, we are low on disk space on these builders. We should try having the build system uninstall unneeded ports on an ongoing basis, as in https://trac.macports.org/ticket/57464 <https://trac.macports.org/ticket/57464>

I am sure this was the result of a previously failure due to disk space. I really think we need to press on deploying those changes discussed above.

cheers Chris

> 
> 
>> P.s. the darwin 9 ppc builder appears to be offline ?
> 
> The 10.5 machine crashed in some way, and it has not been able to boot up after that. I spent some time with it last night and was not successful at getting it to boot up, though I was able to repair the disk and was able to use the disk to boot up a different Power Mac. I'll give it another try later.
> 

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