Illegal instruction on Julia v1.2-rc1 (regression)

[oschulz]

On Julia v1.2-rc1 and v1.3.0-DEV.433 (2019-06-20), we get an Illegal instruction error with SolidStateDetectors:

(v1.2) pkg> add TypedTables#master SolidStateDetectors
(v1.2) pkg> test SolidStateDetectors
   Testing SolidStateDetectors
 Resolving package versions...
 [...]
Unreachable reached at 0x7f75351968fa

signal (4): Illegal instruction
in expression starting at [...]/packages/SolidStateDetectors/7T4zz/test/runtests.jl:8
construct_semiconductor at [...]/packages/SolidStateDetectors/7T4zz/src/SolidStateDetector/SolidStateDetector.jl:72
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2197
construct_objects at [...]/packages/SolidStateDetectors/7T4zz/src/SolidStateDetector/SolidStateDetector.jl:86
jl_apply_generic at /buildworker/worker/package_linux64/build/src/gf.c:2197
[...]

Note: Needs TypedTables#master until a new version of TypedTables is released (see JuliaData/TypedTables.jl#52).

On Julia v1.1.1 all is fine.

Not sure if this is related to JuliaLang/LinearAlgebra.jl#637 - it also happens with the current nightly though, which has JuliaLang/LinearAlgebra.jl#637 fixed.

We've (@oschulz, @lmh91, @hervasa2) run into this on Ubuntu 16, Ubuntu 19, CentOS-7 and OS-X, so doesn't seem to be OS-related.

[JeffBezanson]

This is slightly similar to JuliaLang/LinearAlgebra.jl#637 in that I can't immediately figure out what's going on...

[oschulz]

Sorry that we didn't provide an MWE, didn't manage to put one together so far that reproduces the error. Will be above be Ok for you to track it down?

[JeffBezanson]

Yes, the above is enough.

[oschulz]

Thanks, Jeff!

[JeffBezanson]

Seems to be caused by e3de220. Looks like this is a simpler issue than JuliaLang/LinearAlgebra.jl#637 after all.

[oschulz]

Ah, e3de220 isn't part of v1.2-rc1, right? Will it go into rc2?

[JeffBezanson]

No I believe it is in 1.2-rc1.

[oschulz]

Ah, sorry, silly me - of course it is, otherwise we wouldn't have run into this issue, after all.

(Did look in the history of 1.2-rc1 via gitk, and must have overlooked it.)

[oschulz]

So I guess fix #31993 needs a fix itself? :-)

Sorry I can't be of any help, here, I'm really not familiar enough with the internals of the Julia compiler ...

[oschulz]

Thanks a lot for the speedy fix, @JeffBezanson!