From b2c382f7c1f6949c007cd95248cdcaa9ec3dd559 Mon Sep 17 00:00:00 2001
From: Charlie Marsh <charlie.r.marsh@gmail.com>
Date: Tue, 5 Aug 2025 12:55:58 +0100
Subject: [PATCH] Revert h2 upgrade (#15079)

## Summary

While we figure out what's going on in
https://github.com/hyperium/h2/issues/856.

Closes https://github.com/astral-sh/uv/issues/15056.
---
 Cargo.lock           | 25 +++++++++++++------------
 Cargo.toml           |  3 ++-
 crates/uv/Cargo.toml |  2 ++
 3 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 16caeecdb..66291c884 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -749,7 +749,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "117725a109d387c937a1533ce01b450cbde6b88abceea8473c4d7a85853cda3c"
 dependencies = [
  "lazy_static",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -1148,7 +1148,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "778e2ac28f6c47af28e4907f13ffd1e1ddbd400980a9abd7c8df189bf578a5ad"
 dependencies = [
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -1514,9 +1514,9 @@ dependencies = [
 
 [[package]]
 name = "h2"
-version = "0.4.11"
+version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "17da50a276f1e01e0ba6c029e47b7100754904ee8a278f886546e98575380785"
+checksum = "ccae279728d634d083c00f6099cb58f01cc99c145b84b8be2f6c74618d79922e"
 dependencies = [
  "atomic-waker",
  "bytes",
@@ -1715,7 +1715,7 @@ dependencies = [
  "libc",
  "percent-encoding",
  "pin-project-lite",
- "socket2 0.5.10",
+ "socket2 0.6.0",
  "tokio",
  "tower-service",
  "tracing",
@@ -1941,7 +1941,7 @@ checksum = "e04d7f318608d35d4b61ddd75cbdaee86b023ebe2bd5a66ee0915f0bf93095a9"
 dependencies = [
  "hermit-abi",
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -2001,7 +2001,7 @@ dependencies = [
  "portable-atomic",
  "portable-atomic-util",
  "serde",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -2872,7 +2872,7 @@ dependencies = [
  "once_cell",
  "socket2 0.5.10",
  "tracing",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -3339,7 +3339,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.4.15",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -3352,7 +3352,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.9.4",
- "windows-sys 0.52.0",
+ "windows-sys 0.60.2",
 ]
 
 [[package]]
@@ -3943,7 +3943,7 @@ dependencies = [
  "getrandom 0.3.3",
  "once_cell",
  "rustix 1.0.8",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -4674,6 +4674,7 @@ dependencies = [
  "flate2",
  "fs-err",
  "futures",
+ "h2",
  "http",
  "ignore",
  "indexmap",
@@ -6366,7 +6367,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 6e9742bc8..7df21ebf7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -112,6 +112,7 @@ glob = { version = "0.3.1" }
 globset = { version = "0.4.15" }
 globwalk = { version = "0.9.1" }
 goblin = { version = "0.10.0", default-features = false, features = ["std", "elf32", "elf64", "endian_fd"] }
+h2 = { version = "<=0.4.7" }
 hashbrown = { version = "0.15.1" }
 hex = { version = "0.4.3" }
 home = { version = "0.5.9" }
@@ -213,7 +214,7 @@ test-log = { version = "0.2.16", features = ["trace"], default-features = false
 whoami = { version = "1.6.0" }
 
 [workspace.metadata.cargo-shear]
-ignored = ["flate2", "xz2"]
+ignored = ["flate2", "xz2", "h2"]
 
 [workspace.lints.rust]
 unsafe_code = "warn"
diff --git a/crates/uv/Cargo.toml b/crates/uv/Cargo.toml
index e188ecdf6..22d5d7cc5 100644
--- a/crates/uv/Cargo.toml
+++ b/crates/uv/Cargo.toml
@@ -85,6 +85,7 @@ owo-colors = { workspace = true }
 petgraph = { workspace = true }
 regex = { workspace = true }
 reqwest = { workspace = true }
+h2 = { workspace = true }
 rkyv = { workspace = true }
 rustc-hash = { workspace = true }
 serde = { workspace = true }
@@ -138,6 +139,7 @@ nix = { workspace = true }
 [package.metadata.cargo-shear]
 ignored = [
     "flate2",
+    "h2",
     "uv-performance-memory-allocator",
 ]