Base.path_absolute_re does not match anything

[nalimilan]

isabspath() and isdirpath() always return false in my RPM install of Julia. The git build works fine. This is a problem because JULIA_HOME is not considered as an absolute path though it is set to "/usr/bin", and thus Pkg.dir() is set to /home/user//home/user/.julia.

The problem is that Base.path_absolute_re (and other path regexps) is completely wrong. Could that be due to a problem with pcre on load? Or to a bad locale?

julia> ismatch(Base.path_absolute_re, "/home")
false

julia> Base.path_absolute_re
r"^/"

julia> ismatch(r"^/", "/home")
true

julia> xdump(Base.path_absolute_re)
Regex 
  pattern: ASCIIString 
    data: Array(Uint8,(2,)) [0x5e,0x2f]
  options: Uint32 33564672
  regex: Array(Uint8,(58,)) [0x45,0x52,0x43,0x50,0x3a,0x00,0x00,0x00,0x10,0x28  …  0x7d,0x00,0x06,0x19,0x1d,0x2f,0x72,0x00,0x06,0x00]

julia> xdump(r"^/")
Regex 
  pattern: ASCIIString 
    data: Array(Uint8,(2,)) [0x5e,0x2f]
  options: Uint32 33564672
  regex: Array(Uint8,(74,)) [0x45,0x52,0x43,0x50,0x4a,0x00,0x00,0x00,0x10,0x28  …  0x7d,0x00,0x06,0x19,0x1d,0x2f,0x72,0x00,0x06,0x00]

[StefanKarpinski]

What's your versioninfo()?

[nalimilan]

Well, it's a little... funny.

julia> versioninfo()
ERROR: invalid build identifier: ""
 in error at error.jl:22
 in VersionNumber at version.jl:30
 in print at version.jl:42
 in print_to_string at string.jl:23
 in versioninfo at util.jl:322 (repeats 2 times)

More seriously (that's another bug I have to fix), this is version 0.2.0 64-bit on Fedora 20, built against system libraries.

[StefanKarpinski]

Ah, that's, um, interesting. Something very weird seems to be going on with this build.

[ivarne]

@nalimilan If you can show me or @staticfloat your build process and your base/build_h.jl we might help fix the versioninfo problems. #5095 might make the solution easier in the future.

[nalimilan]

@ivarne Yeah I thought I would wait until #5095 is fixed before possibly filing an issue.

[nalimilan]

Interesting. I rebuilt the package since I've upgraded to Fedora 20, and both issues are gone (paths and version info). Looks like an updated PCRE was not fully ABI-compatible...

[ivarne]

That explains. I could not figure out how the versioninfo() could fail in that manner, but the Version code uses regexes to parse the version_string from the VERSION file in the repository

The PCRE compatibility issue might be fixed when/if #5066 gets merged.