CA-399172: fix potential crash in Uri.of_string

Using Lazy from a multithreaded program should raise Lazy.Undefined.
However due to bugs in the OCaml runtime this was actually crashing.

Update to angstrom 0.16.1 which no longer uses Lazy and avoids this crash.

This was initially discovered:
* mirage/ocaml-uri#178

Fixed in Angstrom:
* inhabitedtype/angstrom#229

Runtime bug reported with potential fix from maintainers:
* ocaml/ocaml#13430
* ocaml/ocaml#13434

There are various other usages of Lazy, but I couldn't get those to crash yet,
so lets fix the known crash for now, and audit/fix the rest next.

Signed-off-by: Edwin Török <edwin.torok@cloud.com>

packages/upstream/angstrom.0.16.0/opam → packages/upstream/angstrom.0.16.1/opam

@@ -1,20 +1,15 @@
 opam-version: "2.0"
-name: "angstrom"
-version: "0.16.0"
-synopsis: "Parser combinators built for speed and memory-efficiency"
-description: """\
-Angstrom is a parser-combinator library that makes it easy to write efficient,
-expressive, and reusable parsers suitable for high-performance applications. It
-exposes monadic and applicative interfaces for composition, and supports
-incremental input through buffered and unbuffered interfaces. Both interfaces
-give the user total control over the blocking behavior of their application,
-with the unbuffered interface enabling zero-copy IO. Parsers are backtracking by
-default and support unbounded lookahead."""
 maintainer: "Spiros Eliopoulos <spiros@inhabitedtype.com>"
-authors: "Spiros Eliopoulos <spiros@inhabitedtype.com>"
-license: "BSD-3-Clause"
+authors: [ "Spiros Eliopoulos <spiros@inhabitedtype.com>" ]
+license: "BSD-3-clause"
 homepage: "https://github.com/inhabitedtype/angstrom"
 bug-reports: "https://github.com/inhabitedtype/angstrom/issues"
+dev-repo: "git+https://github.com/inhabitedtype/angstrom.git"
+build: [
+  ["dune" "subst"] {dev}
+  ["dune" "build" "-p" name "-j" jobs]
+  ["dune" "runtest" "-p" name "-j" jobs] {with-test}
+]
 depends: [
   "ocaml" {>= "4.04.0"}
   "dune" {>= "1.8"}
@@ -23,16 +18,19 @@ depends: [
   "ppx_let" {with-test & >= "v0.14.0"}
   "ocaml-syntax-shims" {build}
 ]
-build: [
-  ["dune" "subst"] {dev}
-  ["dune" "build" "-p" name "-j" jobs]
-  ["dune" "runtest" "-p" name "-j" jobs] {with-test}
-]
-dev-repo: "git+https://github.com/inhabitedtype/angstrom.git"
+synopsis: "Parser combinators built for speed and memory-efficiency"
+description: """
+Angstrom is a parser-combinator library that makes it easy to write efficient,
+expressive, and reusable parsers suitable for high-performance applications. It
+exposes monadic and applicative interfaces for composition, and supports
+incremental input through buffered and unbuffered interfaces. Both interfaces
+give the user total control over the blocking behavior of their application,
+with the unbuffered interface enabling zero-copy IO. Parsers are backtracking by
+default and support unbounded lookahead."""
 url {
-  src: "https://github.com/inhabitedtype/angstrom/archive/0.16.0.tar.gz"
+  src: "https://github.com/inhabitedtype/angstrom/archive/0.16.1.tar.gz"
   checksum: [
-    "sha256=47810bd31306d57c0ac83eb3f95b1cb6f8bdda99457aa6e6bcd02f6ddb8410f0"
-    "md5=58ebc718a920c31ec3eb38f4aa1bea51"
+    "md5=a9e096b4b2b8e4e3bb17d472bbccaad0"
+    "sha256=143536fb4d049574c539b9990840615e078ed3dd94e1d24888293f68349a100b"
   ]
 }