Type inference error due to precompilation

[yuyichao]

A.jl

__precompile__()

module A
function f1()
    warn("")
end
precompile(f1, ())
end

B.jl

__precompile__()

module B
function f2()
    warn("")
end
precompile(f2, ())
end

runtests.jl (in the same directory as A.jl and B.jl)

#

unshift!(Base.LOAD_PATH, dirname(@__FILE__))

using B
using A

B.f2()
A.f1()

Running on current master gives,

WARNING: 
WARNING: An error occurred during inference. Type inference is now partially disabled.
ErrorException("type inference data-flow error: tried to double infer a function")
rec_backtrace at /build/julia-git/src/julia-avx2/src/stackwalk.c:84
record_backtrace at /build/julia-git/src/julia-avx2/src/task.c:238
jl_throw at /build/julia-git/src/julia-avx2/src/task.c:560
abstract_eval at ./inference.jl:1186
unknown function (ip: 0x7fee9cbdb506)
jl_apply_generic at /build/julia-git/src/julia-avx2/src/gf.c:1944
abstract_interpret at ./inference.jl:1238
unknown function (ip: 0x7fee9cbd9c26)
jl_apply_generic at /build/julia-git/src/julia-avx2/src/gf.c:1944
typeinf_frame at ./inference.jl:1733
typeinf_loop at ./inference.jl:1679
unknown function (ip: 0x7fee9cbd95db)
jl_apply_generic at /build/julia-git/src/julia-avx2/src/gf.c:1944
typeinf_edge at ./inference.jl:1598
jl_apply_generic at /build/julia-git/src/julia-avx2/src/gf.c:1944
typeinf_ext at ./inference.jl:1622
jl_apply_generic at /build/julia-git/src/julia-avx2/src/gf.c:1944
jl_apply at /build/julia-git/src/julia-avx2/src/julia.h:1364 [inlined]
jl_type_infer at /build/julia-git/src/julia-avx2/src/gf.c:212
emit_invoke at /build/julia-git/src/julia-avx2/src/codegen.cpp:2724 [inlined]
emit_expr at /build/julia-git/src/julia-avx2/src/codegen.cpp:3190
emit_function at /build/julia-git/src/julia-avx2/src/codegen.cpp:4792
jl_compile_linfo at /build/julia-git/src/julia-avx2/src/codegen.cpp:810
jl_compile_for_dispatch at /build/julia-git/src/julia-avx2/src/gf.c:1312
jl_call_method_internal at /build/julia-git/src/julia-avx2/src/julia_internal.h:180
jl_apply_generic at /build/julia-git/src/julia-avx2/src/gf.c:1944
do_call at /build/julia-git/src/julia-avx2/src/interpreter.c:66
eval at /build/julia-git/src/julia-avx2/src/interpreter.c:205
jl_interpret_toplevel_expr at /build/julia-git/src/julia-avx2/src/interpreter.c:31 [inlined]
jl_toplevel_eval_flex at /build/julia-git/src/julia-avx2/src/toplevel.c:619
jl_parse_eval_all at /build/julia-git/src/julia-avx2/src/ast.c:735
jl_load at /build/julia-git/src/julia-avx2/src/toplevel.c:657
jl_load_ at /build/julia-git/src/julia-avx2/src/toplevel.c:666
include_from_node1 at ./loading.jl:541
unknown function (ip: 0x7fee9cd0864b)
jl_apply_generic at /build/julia-git/src/julia-avx2/src/gf.c:1944
process_options at ./client.jl:262
_start at ./client.jl:326
unknown function (ip: 0x7fee9cd2e308)
jl_apply_generic at /build/julia-git/src/julia-avx2/src/gf.c:1944
unknown function (ip: 0x40181c)
unknown function (ip: 0x401276)
__libc_start_main at /usr/bin/../lib/libc.so.6 (unknown line)
unknown function (ip: 0x4012d9)
WARNING: 

This causes a failure in Gadfly test.
Doesn't happen on 0.4 or 0.5.

[yuyichao]

Fixed by #18413

[tkelman]

#18413 did not add a test for this on master, did it?