Fixed an infinite loop with fixed & ignored package depending on another release

.changeset/funny-cooks-clap.md

@@ -0,0 +1,6 @@
+---
+"@changesets/assemble-release-plan": patch
+"@changesets/cli": patch
+---
+
+Fixed an infinite loop involving a fixed group of packages and a package within that group that was both ignored and dependent on another package from that group.

packages/assemble-release-plan/src/index.ts

@@ -126,7 +126,7 @@ function assembleReleasePlan(
     let fixedConstraintUpdated = matchFixedConstraint(
       releases,
       packagesByName,
-      config.fixed
+      config
     );
     let linksUpdated = applyLinks(releases, packagesByName, config.linked);
 

packages/assemble-release-plan/src/match-fixed-constraint.ts

@@ -1,16 +1,16 @@
-import { Fixed } from "@changesets/types";
+import { Config } from "@changesets/types";
 import { Package } from "@manypkg/get-packages";
 import { InternalRelease } from "./types";
 import { getCurrentHighestVersion, getHighestReleaseType } from "./utils";
 
 export default function matchFixedConstraint(
   releases: Map<string, InternalRelease>,
   packagesByName: Map<string, Package>,
-  fixed: Fixed
+  config: Config
 ): boolean {
   let updated = false;
 
-  for (let fixedPackages of fixed) {
+  for (let fixedPackages of config.fixed) {
     let releasingFixedPackages = [...releases.values()].filter(
       release => fixedPackages.includes(release.name) && release.type !== "none"
     );
@@ -25,6 +25,9 @@ export default function matchFixedConstraint(
 
     // Finally, we update the packages so all of them are on the highest version
     for (let pkgName of fixedPackages) {
+      if (config.ignore.includes(pkgName)) {
+        continue;
+      }
       let release = releases.get(pkgName);
 
       if (!release) {

packages/cli/src/commands/version/version.test.ts

@@ -346,6 +346,34 @@ describe("fixed", () => {
     );
   });
 
+  it("should not bump an ignored fixed package that depends on a package from the group that is being released", async () => {
+    const cwd = await f.copy("fixed-packages");
+    await writeChangesets([simpleChangeset3], cwd);
+
+    await version(cwd, defaultOptions, {
+      ...modifiedDefaultConfig,
+      fixed: [["pkg-a", "pkg-b"]],
+      ignore: ["pkg-a"]
+    });
+
+    expect((await getPackages(cwd)).packages.map(x => x.packageJson))
+      .toMatchInlineSnapshot(`
+      Array [
+        Object {
+          "dependencies": Object {
+            "pkg-b": "1.0.1",
+          },
+          "name": "pkg-a",
+          "version": "1.0.0",
+        },
+        Object {
+          "name": "pkg-b",
+          "version": "1.0.1",
+        },
+      ]
+    `);
+  });
+
   it("should update CHANGELOGs of all packages from the fixed group", async () => {
     const cwd = await f.copy("fixed-packages");
     const spy = jest.spyOn(fs, "writeFile");