findfirst() returns nonzero values upon failure

[epipping]

The documentation does not specify what findfirst() should return when its argument consists only of false entries. According to #925, it should be 0.

The reality looks a bit different, though.

julia> findfirst(!,trues(10))
11

julia> findfirst(falses(10))
0

So what does findfirst() return upon failure then? 0 or length+1? Something else?

[epipping]

Version info:

Julia Version 0.3.0-rc4
Commit e844f0c* (2014-08-15 04:01 UTC)
Platform Info:
  System: Linux (x86_64-linux-gnu)
  CPU: Intel(R) Xeon(R) CPU E31245 @ 3.30GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Sandybridge)
  LAPACK: libopenblas
  LIBM: libopenlibm
  LLVM: libLLVM-3.3

[carlobaldassi]

Looks like a bug in the implementation of findfirst on BitArrays, I'll fix it.

[carlobaldassi]

Fixed and cherry-picked on the 0.3 release branch. Thanks for the report.