feat: handle case where there is a fatal error in the base build but not the head (#205)

Co-authored-by: meorphis <eric@stainless.com>

Author: meorphis

dist/build.js

@@ -166,6 +166,17 @@ export function categorizeOutcome({
         : null,
     };
   }
+
+  if (baseConclusion && conclusions.fatal.includes(baseConclusion)) {
+    return {
+      isPending: false,
+      conclusion: headConclusion,
+      severity: null,
+      description: `had a "${baseOutcome?.commit?.conclusion}" conclusion in the base build, which improved to "${headConclusion}"`,
+      isRegression: false,
+    };
+  }
+
   if (
     conclusions.diagnostic.includes(headConclusion) ||
     newDiagnostics.length > 0 ||