runtime: Support calling host exports in globals

Author: leoyvens

Cargo.lock

@@ -25,8 +25,14 @@ bytes = "0.5"
 # See also 92cd8019-0136-4011-96a0-40b3eec37f73
 maybe-owned = { git = "https://github.com/rustonaut/maybe-owned", branch = "master" }
 
-# Use a released version once 0.18 is released.
-wasmtime = { git = "https://github.com/bytecodealliance/wasmtime" }
+# We need patch in order to be able to call host exports when initializing globals.
+#
+# By this conversation, wasmtime does not want to upstream this, pointing out that there is an
+# incompatibility between the way AS does things and the direction wasmtime wants to take:
+# https://bytecodealliance.zulipchat.com/#narrow/stream/206238-general/topic/Host.20functions.20in.20start
+#
+# See also 3a23f045-eb9d-4b12-8c7c-3a4c2e34bea1
+wasmtime = { git = "https://github.com/graphprotocol/wasmtime", branch = "master" }
 
 defer = "0.1"