[pull] master from JuliaIO:master

.github/workflows/Documentation.yml

@@ -21,7 +21,7 @@ jobs:
         with:
           version: '1'
       - name: CacheArtifacts
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         env:
           cache-name: cache-artifacts
         with:

Project.toml

@@ -1,6 +1,6 @@
 name = "MAT"
 uuid = "23992714-dd62-5051-b70f-ba57cb901cac"
-version = "0.10.6"
+version = "0.10.7"
 
 [deps]
 BufferedStreams = "e1450e63-4bb3-523b-b2a4-4ffa8c0fd77d"

src/MAT_HDF5.jl

@@ -229,7 +229,7 @@ function m_read(g::HDF5.Group)
             @warn "MATLAB $mattype values are currently not supported"
             return missing
         else
-            error("Cannot read from a non-struct group, type was $mattype")
+            @warn "Unknown non-struct group of type $mattype detected; attempting to read as struct"
         end
     end
     if haskey(g, "MATLAB_fields")

test/read.jl

@@ -230,3 +230,10 @@ let objtestfile = "struct_table_datetime.mat"
     @test "testDatetime" in keys(vars)
     @test ismissing(vars["testDatetime"])
 end
+
+# test reading of old-style Matlab object in v7.3 format
+let objtestfile = "old_class.mat"
+    vars = matread(joinpath(dirname(@__FILE__), "v7.3", objtestfile))
+    @test "tc_old" in keys(vars)
+    @test "foo" in keys(vars["tc_old"])
+end