Track if had second pass consistency error so only report once (#127)

src/server/beebasm-ts/lineparser.ts

@@ -3601,10 +3601,13 @@ export class LineParser {
           typeof value !== 'number' ||
           value !== ObjectCode.Instance.GetPC()
         ) {
-          throw new AsmException.SyntaxError_SecondPassProblem(
-            this._line,
-            oldColumn,
-          )
+          if (!ObjectCode.Instance.HadSecondPassError) {
+            ObjectCode.Instance.HadSecondPassError = true
+            throw new AsmException.SyntaxError_SecondPassProblem(
+              this._line,
+              oldColumn,
+            )
+          }
         }
         SymbolTable.Instance.AddLabel(symbolName)
       }

src/server/beebasm-ts/objectcode.ts

@@ -46,6 +46,7 @@ export class ObjectCode {
   // After one consistency error, all subsequent code will probably be wrong, so just raise once
   // or we'll get a lot of errors and potentially cause severe slowdown
   private _hadConsistencyError = false
+  private _hadSecondPassError = false
 
   private constructor() {
     //SymbolTable.Instance.AddSymbol( "CPU", this._CPU );
@@ -62,6 +63,7 @@ export class ObjectCode {
     this._aFlags.fill(0)
     this._aMapChar.fill(0)
     this._hadConsistencyError = false
+    this._hadSecondPassError = false
   }
 
   public GetCPU(): number {
@@ -81,6 +83,14 @@ export class ObjectCode {
     this._PC = i
   }
 
+  public get HadSecondPassError(): boolean {
+    return this._hadSecondPassError
+  }
+
+  public set HadSecondPassError(s: boolean) {
+    this._hadSecondPassError = s
+  }
+
   public PutByte(b: number): void {
     if (this._PC > 0xffff) {
       throw new AsmException.AssembleError_OutOfMemory()