From 4bec65c479934f44ec6f2662a0e2054dcecb2a48 Mon Sep 17 00:00:00 2001
From: Kim Morrison <kim@tqft.net>
Date: Sat, 24 Jan 2026 15:23:56 +1100
Subject: [PATCH] chore: bump toolchain to v4.27.0

---
 lean-toolchain                  |  2 +-
 test/Mathlib/lake-manifest.json | 24 ++++++++++++------------
 test/Mathlib/lakefile.toml      |  2 +-
 test/Mathlib/lean-toolchain     |  2 +-
 4 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/lean-toolchain b/lean-toolchain
index bd19bde0..5249182c 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.27.0-rc1
+leanprover/lean4:v4.27.0
diff --git a/test/Mathlib/lake-manifest.json b/test/Mathlib/lake-manifest.json
index f91f1b95..1105821d 100644
--- a/test/Mathlib/lake-manifest.json
+++ b/test/Mathlib/lake-manifest.json
@@ -5,17 +5,17 @@
    "type": "git",
    "subDir": null,
    "scope": "",
-   "rev": "32d24245c7a12ded17325299fd41d412022cd3fe",
+   "rev": "a3a10db0e9d66acbebf76c5e6a135066525ac900",
    "name": "mathlib",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.27.0-rc1",
+   "inputRev": "v4.27.0",
    "inherited": false,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover-community/plausible",
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "8d3713f36dda48467eb61f8c1c4db89c49a6251a",
+   "rev": "009dc1e6f2feb2c96c081537d80a0905b2c6498f",
    "name": "plausible",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
@@ -25,7 +25,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "19e5f5cc9c21199be466ef99489e3acab370f079",
+   "rev": "5ce7f0a355f522a952a3d678d696bd563bb4fd28",
    "name": "LeanSearchClient",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
@@ -35,7 +35,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "4eb26e1a4806b200ddfe5179d0c2a0fae56c54a7",
+   "rev": "8f497d55985a189cea8020d9dc51260af1e41ad2",
    "name": "importGraph",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
@@ -45,17 +45,17 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "ef8377f31b5535430b6753a974d685b0019d0681",
+   "rev": "c04225ee7c0585effbd933662b3151f01b600e40",
    "name": "proofwidgets",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v0.0.84",
+   "inputRev": "v0.0.85",
    "inherited": true,
    "configFile": "lakefile.lean"},
   {"url": "https://github.com/leanprover-community/aesop",
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "fb12f5535c80e40119286d9575c9393562252d21",
+   "rev": "cb837cc26236ada03c81837bebe0acd9c70ced7d",
    "name": "aesop",
    "manifestFile": "lake-manifest.json",
    "inputRev": "master",
@@ -65,7 +65,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "523ec6fc8062d2f470fdc8de6f822fe89552b5e6",
+   "rev": "bd58c9efe2086d56ca361807014141a860ddbf8c",
    "name": "Qq",
    "manifestFile": "lake-manifest.json",
    "inputRev": "master",
@@ -75,7 +75,7 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover-community",
-   "rev": "6254bed25866358ce4f841fa5a13b77de04ffbc8",
+   "rev": "b25b36a7caf8e237e7d1e6121543078a06777c8a",
    "name": "batteries",
    "manifestFile": "lake-manifest.json",
    "inputRev": "main",
@@ -85,10 +85,10 @@
    "type": "git",
    "subDir": null,
    "scope": "leanprover",
-   "rev": "726b98c53e2da249c1de768fbbbb5e67bc9cef60",
+   "rev": "55c37290ff6186e2e965d68cf853a57c0702db82",
    "name": "Cli",
    "manifestFile": "lake-manifest.json",
-   "inputRev": "v4.27.0-rc1",
+   "inputRev": "v4.27.0",
    "inherited": true,
    "configFile": "lakefile.toml"}],
  "name": "«repl-mathlib-tests»",
diff --git a/test/Mathlib/lakefile.toml b/test/Mathlib/lakefile.toml
index a94e91b3..f97faa28 100644
--- a/test/Mathlib/lakefile.toml
+++ b/test/Mathlib/lakefile.toml
@@ -4,7 +4,7 @@ defaultTargets = ["ReplMathlibTests"]
 [[require]]
 name = "mathlib"
 git = "https://github.com/leanprover-community/mathlib4"
-rev = "v4.27.0-rc1"
+rev = "v4.27.0"
 
 [[lean_lib]]
 name = "ReplMathlibTests"
diff --git a/test/Mathlib/lean-toolchain b/test/Mathlib/lean-toolchain
index bd19bde0..5249182c 100644
--- a/test/Mathlib/lean-toolchain
+++ b/test/Mathlib/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:v4.27.0-rc1
+leanprover/lean4:v4.27.0