Memory leak when reading mat files v7

[ymtoo]

MWE:

for _ ∈  1:1000000
    matread("test/v7/array.mat")
end

Memory usage is growing until OOM. It works fine when reading mat files v6 and v7.3.

Julia and package version:

julia> versioninfo()
Julia Version 1.8.4
Commit 00177ebc4fc (2022-12-23 21:32 UTC)
Platform Info:
  OS: Linux (x86_64-linux-gnu)
  CPU: 8 × Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-13.0.1 (ORCJIT, skylake)
  Threads: 1 on 8 virtual cores

(jl_Qk9Uql) pkg> st
Status `/tmp/jl_Qk9Uql/Project.toml`
  [23992714] MAT v0.10.3

[ilkerduymaz]

I am also having excessive memory leak issues with v0.10.7 on Julia 1.11.2 when reading mat files.

[ilkerduymaz]

I suspect this is related to the memory leak issue in the HDF5 library JuliaIO/HDF5.jl#1186