Fix parseVersion trailing separator regression

readVersionIdentifiers incorrectly included trailing dots/dashes when
the input ended immediately after a separator. Track lastValidEnd to
return the position of the last complete identifier segment instead.

Added test cases for trailing separator edge cases.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: niemyjski

packages/core/src/Utils.ts

@@ -88,24 +88,27 @@ function readDigits(input: string, start: number): number {
 
 function readVersionIdentifiers(input: string, start: number): number {
   let index = start;
+  let lastValidEnd = -1;
   while (index < input.length) {
     const segmentStart = index;
     while (index < input.length && isVersionIdentifierCode(input.charCodeAt(index))) {
       index++;
     }
 
     if (index === segmentStart) {
-      return -1;
+      return lastValidEnd;
     }
 
+    lastValidEnd = index;
+
     if (input[index] !== ".") {
       return index;
     }
 
     index++;
   }
 
-  return index;
+  return lastValidEnd;
 }
 
 export function parseVersion(source: string): string | null {

packages/core/test/Utils.test.ts

@@ -627,6 +627,10 @@ describe("Utils", () => {
   test("should parse semantic version labels without regex backtracking", () => {
     expect(parseVersion("release/v1.2.3-rc.1+build.5/index.js")).toBe("v1.2.3-rc.1+build.5");
     expect(parseVersion("release-1.2.3-.js")).toBe("1.2.3");
+    expect(parseVersion("1.2.3-")).toBe("1.2.3");
+    expect(parseVersion("1.2.3+")).toBe("1.2.3");
+    expect(parseVersion("1.2.3-rc.")).toBe("1.2.3-rc");
+    expect(parseVersion("1.2.3-rc.1+build.")).toBe("1.2.3-rc.1+build");
   });
 
   test("should generate guids without Math.random", () => {