Bump Host MSRV to 1.81

Resolves issues compiling qemu-run.

Author: jonathanpallant

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
           - windows-latest
         toolchain:
           - "stable"
-          - "1.78" # host MSRV
+          - "1.81" # host MSRV
     runs-on: ${{ matrix.os }}
     timeout-minutes: 20
     steps:
@@ -36,7 +36,7 @@ jobs:
         if: matrix.os == 'ubuntu-latest'
         run: sudo apt-get update && sudo apt-get install libudev-dev libusb-1.0-0-dev
       - name: Check that all crates that can be compiled for the host build, check that defmt compiles with different features, run all unit tests on the host
-        run: cargo xtask -d test-host ${{ matrix.toolchain == '1.78' && '--skip-ui-tests' || '' }}
+        run: cargo xtask -d test-host ${{ matrix.toolchain == '1.81' && '--skip-ui-tests' || '' }}
 
   cross:
     strategy:
@@ -91,7 +91,7 @@ jobs:
       matrix:
         toolchain:
           - "1.87" # we pin clippy because it keeps adding new lints
-          - "1.78" # host MSRV
+          - "1.81" # host MSRV
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
@@ -108,7 +108,7 @@ jobs:
       matrix:
         toolchain:
           - "stable"
-          - "1.78" # host MSRV
+          - "1.81" # host MSRV
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -124,7 +124,7 @@ jobs:
       matrix:
         toolchain:
           - "stable"
-          - "1.78" # host MSRV
+          - "1.81" # host MSRV
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
@@ -145,7 +145,7 @@ jobs:
       matrix:
         toolchain:
           - stable
-          - "1.78" # host MSRV
+          - "1.81" # host MSRV
           - nightly-2025-08-05 # some tests use unstable features, but avoid LLVM21 due to https://github.com/rust-lang/rust/issues/146065
     runs-on: ubuntu-latest
     steps:
@@ -166,7 +166,7 @@ jobs:
       matrix:
         toolchain:
           - "stable"
-          - "1.78" # host MSRV
+          - "1.81" # host MSRV
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4

CHANGELOG.md

@@ -510,7 +510,7 @@ Initial release
 
 * [#952] Support sending dtr on connection for serial port input
 * [#965] Also support `--log-format=online` or  `--log-format=default`
-* [#986] Bump MSRV to 1.78
+* [#986] Bump MSRV to 1.81
 
 ### [defmt-print-v1.0.0] (2025-04-01)
 
@@ -591,7 +591,7 @@ Initial release
 ### [defmt-decoder-next]
 
 * [#958] Update to object 0.36
-* [#986] Bump MSRV to 1.78
+* [#986] Bump MSRV to 1.81
 
 ### [defmt-decoder-v1.0.0] (2025-04-01)
 
@@ -665,7 +665,7 @@ Initial release
 ### [defmt-parser-next]
 
 * [#956]: Link LICENSE-* in the crate folder
-* [#986] Bump MSRV to 1.78
+* [#986] Bump MSRV to 1.81
 
 ### [defmt-parser-v1.0.0] (2025-04-01)
 

README.md

@@ -25,7 +25,7 @@ This repository contains the following packages:
 
 ## MSRV
 
-The minimum supported Rust version is 1.76 (or Ferrocene 24.05) for the crates that cross-compile to your microcontroller. The minimum supported Rust version is 1.78 for all host-side crates.
+The minimum supported Rust version is 1.76 (or Ferrocene 24.05) for the crates that cross-compile to your microcontroller. The minimum supported Rust version is 1.81 for all host-side crates.
 
 `defmt` is tested against the latest stable Rust version and the MSRV.
 

decoder/README.md

@@ -10,7 +10,7 @@ into formatted strings. It is used by
 
 ## MSRV
 
-The minimum supported Rust version is 1.78. `defmt` is tested against the latest stable Rust version and the MSRV.
+The minimum supported Rust version is 1.81. `defmt` is tested against the latest stable Rust version and the MSRV.
 
 ## Support
 

decoder/defmt-json-schema/README.md

@@ -9,7 +9,7 @@ This library describes the JSON output from
 
 ## MSRV
 
-The minimum supported Rust version is 1.78. `defmt` is tested against the latest stable Rust version and the MSRV.
+The minimum supported Rust version is 1.81. `defmt` is tested against the latest stable Rust version and the MSRV.
 
 ## Support
 

parser/README.md

@@ -10,7 +10,7 @@ using that crate to this one.
 
 ## MSRV
 
-The minimum supported Rust version is 1.78. `defmt` is tested against the latest stable Rust version and the MSRV.
+The minimum supported Rust version is 1.81. `defmt` is tested against the latest stable Rust version and the MSRV.
 
 ## Support