Garbage Collection Segfaults on 1.11 from Enzyme + SymbolicRegression #56735
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Description
With the following environment:
using Pkg
Pkg.activate(temp=true)
Pkg.add([
PackageSpec(name="SymbolicRegression", version=v"1.0.3"),
PackageSpec(name="Enzyme", rev="3ad827f69299299b92a1448f52dd746a65eb5db7"),
PackageSpec(name="MLJBase", version=v"1.7.0"),
])The following code segfaults on 1.11.1. However, it works fine on 1.10.7.
using SymbolicRegression, Enzyme, MLJBase
X = randn(Float64, 32, 2)
y = randn(Float64, 32)
model = SRRegressor(;
binary_operators=[+, *, /, -],
unary_operators=[cos, exp],
autodiff_backend=:Enzyme,
niterations=1000, # Larger because the segfault is stochastic
);
mach = machine(model, X, y)
fit!(mach)The error message on 1.11.1 is:
[98721] signal 11 (2): Segmentation fault: 11 in expression starting at REPL[23]
gc_mark_obj8 at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-11/src/gc.c:0 [inlined]
gc_mark_outrefs at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-11/src/gc.c:2888 [inlined]
gc_mark_and_steal at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-11/src/gc.c:2993
gc_mark_loop_parallel at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-11/src/gc.c:3141
jl_parallel_gc_threadfun at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-R17H3W25T9.0/build/default-honeycrisp-R17H3W25T9-0/julialang/julia-release-1-dot-11/src/scheduler.c:151e-01
_pthread_start at /usr/lib/system/libsystem_pthread.dylib (unknown line)
Allocations: 323517950 (Pool: 323091059; Big: 426891); GC: 411There is no error on 1.10.7.
Let me know what other debug info I can provide on this.
x-ref EnzymeAD/Enzyme.jl#2081
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