hypot error on Julia 1.7

[jgreener64]

This works on Julia 1.9 and Enzyme main (b35703b):

using Enzyme
f(x) = hypot(x, 2x)
autodiff(Reverse, f, Active, Active(2.0))[1][1] # 2.23606797749979
autodiff(Forward, f, Duplicated(2.0, 1.0))[1]   # 2.23606797749979

But on Julia 1.7.3 it seems to error. I couldn't reproduce locally but at https://github.com/EnzymeAD/Enzyme.jl/actions/runs/5727131372/job/15518920903?pr=969 the error appears to be:

signal (11): Segmentation fault
in expression starting at /home/runner/work/Enzyme.jl/Enzyme.jl/test/runtests.jl:258
vector at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_vector.h:460 [inlined]
pair at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_pair.h:292 [inlined]
construct<std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>, const std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>&> at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/ext/new_allocator.h:136 [inlined]
construct<std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>, const std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>&> at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/alloc_traits.h:475 [inlined]
_M_construct_node<const std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>&> at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_tree.h:637 [inlined]
_M_create_node<const std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>&> at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_tree.h:654 [inlined]
operator()<const std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>&> at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_tree.h:567 [inlined]
_M_clone_node<std::_Rb_tree<const std::vector<int, std::allocator<int> >, std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>, std::_Select1st<std::pair<const std::vector<int, std::allocator<int> >, ConcreteType> >, std::less<const std::vector<int, std::allocator<int> > >, std::allocator<std::pair<const std::vector<int, std::allocator<int> >, ConcreteType> > >::_Alloc_node> at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_tree.h:677 [inlined]
_M_copy<std::_Rb_tree<const std::vector<int, std::allocator<int> >, std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>, std::_Select1st<std::pair<const std::vector<int, std::allocator<int> >, ConcreteType> >, std::less<const std::vector<int, std::allocator<int> > >, std::allocator<std::pair<const std::vector<int, std::allocator<int> >, ConcreteType> > >::_Alloc_node> at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_tree.h:1834
_M_copy<std::_Rb_tree<const std::vector<int, std::allocator<int> >, std::pair<const std::vector<int, std::allocator<int> >, ConcreteType>, std::_Select1st<std::pair<const std::vector<int, std::allocator<int> >, ConcreteType> >, std::less<const std::vector<int, std::allocator<int> > >, std::allocator<std::pair<const std::vector<int, std::allocator<int> >, ConcreteType> > >::_Alloc_node> at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_tree.h:891 [inlined]
_M_copy at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_tree.h:902 [inlined]
_Rb_tree at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_tree.h:940 [inlined]
map at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/stl_map.h:205 [inlined]
TypeTree at /workspace/srcdir/Enzyme/enzyme/Enzyme/TypeAnalysis/TypeTree.h:72 [inlined]
EnzymeMergeTypeTree at /workspace/srcdir/Enzyme/enzyme/Enzyme/CApi.cpp:710
EnzymeMergeTypeTree at /home/runner/work/Enzyme.jl/Enzyme.jl/src/api.jl:68 [inlined]
inout_rule at /home/runner/work/Enzyme.jl/Enzyme.jl/src/compiler.jl:7181
unknown function (ip: 0x7f969858aed4)
operator() at /workspace/srcdir/Enzyme/enzyme/Enzyme/CApi.cpp:273 [inlined]
_M_invoke at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/std_function.h:282
operator() at /opt/x86_64-linux-gnu/x86_64-linux-gnu/include/c++/8.1.0/bits/std_function.h:687 [inlined]
visitCallInst at /workspace/srcdir/Enzyme/enzyme/Enzyme/TypeAnalysis/TypeAnalysis.cpp:3776
visitValue at /workspace/srcdir/Enzyme/enzyme/Enzyme/TypeAnalysis/TypeAnalysis.cpp:1167
run at /workspace/srcdir/Enzyme/enzyme/Enzyme/TypeAnalysis/TypeAnalysis.cpp:1096
analyzeFunction at /workspace/srcdir/Enzyme/enzyme/Enzyme/TypeAnalysis/TypeAnalysis.cpp:5370
CreateFromClone at /workspace/srcdir/Enzyme/enzyme/Enzyme/DiffeGradientUtils.cpp:149
CreatePrimalAndGradient at /workspace/srcdir/Enzyme/enzyme/Enzyme/EnzymeLogic.cpp:3933
recursivelyHandleSubfunction at /workspace/srcdir/Enzyme/enzyme/Enzyme/AdjointGenerator.h:7751
visitCallInst at /workspace/srcdir/Enzyme/enzyme/Enzyme/AdjointGenerator.h:10297
main at /buildworker/worker/package_linux64/build/cli/loader_exe.c:42
__libc_start_main at /lib/x86_64-linux-gnu/libc.so.6 (unknown line)
_start at /opt/hostedtoolcache/julia/1.7.3/x64/bin/julia (unknown line)
Allocations: 337983577 (Pool: 337774263; Big: 209314); GC: 268
ERROR: LoadError: Package Enzyme errored during testing (received signal: 11)
Stacktrace:
 [1] pkgerror(msg::String)
   @ Pkg.Types /opt/hostedtoolcache/julia/1.7.3/x64/share/julia/stdlib/v1.7/Pkg/src/Types.jl:68
 [2] test(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}; coverage::Bool, julia_args::Cmd, test_args::Cmd, test_fn::Nothing, force_latest_compatible_version::Bool, allow_earlier_backwards_compatible_versions::Bool, allow_reresolve::Bool)
   @ Pkg.Operations /opt/hostedtoolcache/julia/1.7.3/x64/share/julia/stdlib/v1.7/Pkg/src/Operations.jl:1672
 [3] test(ctx::Pkg.Types.Context, pkgs::Vector{Pkg.Types.PackageSpec}; coverage::Bool, test_fn::Nothing, julia_args::Vector{String}, test_args::Cmd, force_latest_compatible_version::Bool, allow_earlier_backwards_compatible_versions::Bool, allow_reresolve::Bool, kwargs::Base.Pairs{Symbol, IOContext{Base.PipeEndpoint}, Tuple{Symbol}, NamedTuple{(:io,), Tuple{IOContext{Base.PipeEndpoint}}}})
   @ Pkg.API /opt/hostedtoolcache/julia/1.7.3/x64/share/julia/stdlib/v1.7/Pkg/src/API.jl:421
 [4] test(pkgs::Vector{Pkg.Types.PackageSpec}; io::IOContext{Base.PipeEndpoint}, kwargs::Base.Pairs{Symbol, Any, Tuple{Symbol, Symbol, Symbol}, NamedTuple{(:coverage, :julia_args, :force_latest_compatible_version), Tuple{Bool, Vector{String}, Bool}}})
   @ Pkg.API /opt/hostedtoolcache/julia/1.7.3/x64/share/julia/stdlib/v1.7/Pkg/src/API.jl:149
 [5] test(; name::Nothing, uuid::Nothing, version::Nothing, url::Nothing, rev::Nothing, path::Nothing, mode::Pkg.Types.PackageMode, subdir::Nothing, kwargs::Base.Pairs{Symbol, Any, Tuple{Symbol, Symbol, Symbol}, NamedTuple{(:coverage, :julia_args, :force_latest_compatible_version), Tuple{Bool, Vector{String}, Bool}}})
   @ Pkg.API /opt/hostedtoolcache/julia/1.7.3/x64/share/julia/stdlib/v1.7/Pkg/src/API.jl:164
 [6] top-level scope
   @ ~/work/_actions/julia-actions/julia-runtest/v1/test_harness.jl:15
 [7] include(fname::String)
   @ Base.MainInclude ./client.jl:451
 [8] top-level scope
   @ none:1
in expression starting at /home/runner/work/_actions/julia-actions/julia-runtest/v1/test_harness.jl:7
Error: Process completed with exit code 1.

[wsmoses]

I also cannot reproduce this locally? Can you make a branch/PR that only contains the failing test [with CI failing]

[jgreener64]

See #990 for test failure.

[wsmoses]

Sorry to ask for more, but can you nuke the CI test branch to literally only contain the failing test (and not any previous tests)?

[jgreener64]

Sure, done.

[wsmoses]

Now fixed