[metadata] Handle MONO_TYPE_FNPTR case in collect_type_images (#34517)

Fixes abort when PTR-FNPTR field signature is encountered.

I do not have a deep understanding of how the code in this area works,
but I have called the function that appears most consistent with how
other signatures are being handled.

Fixes mono/mono#12098
Fixes mono/mono#17113
Fixes mono/mono#19433

Co-authored-by: whydoubt <whydoubt@users.noreply.github.com>

diff --git a/src/mono/mono/metadata/metadata.c b/src/mono/mono/metadata/metadata.c
index 5734b9f..6b659fc 100644 (file)
--- a/src/mono/mono/metadata/metadata.c
+++ b/src/mono/mono/metadata/metadata.c
@@ -3054,8 +3054,8 @@ retry:
                type = m_class_get_byval_arg (type->data.array->eklass);
                goto retry;
        case MONO_TYPE_FNPTR:
-               //return signature_in_image (type->data.method, image);
-               g_assert_not_reached ();
+               collect_signature_images (type->data.method, data);
+               break;
        case MONO_TYPE_VAR:
        case MONO_TYPE_MVAR:
        {