case where generated sources are not to be considered

libs/remix-debug/src/source/sourceLocationTracker.ts

@@ -60,6 +60,19 @@ export class SourceLocationTracker {
   }
 
   /**
+   * Returns the total amount of sources from a specific @arg address and @arg contracts
+   *
+   * @param {String} address - contract address from which has generated sources
+   * @param {Object} contracts - AST of compiled contracts
+   */
+  getTotalAmountOfSources (address, contracts) {
+    let sourcesLength = Object.keys(contracts).length
+    const generatedSources = this.getGeneratedSourcesFromAddress(address)
+    if (generatedSources) sourcesLength = sourcesLength + Object.keys(generatedSources).length
+    return sourcesLength
+  }
+
+  /**
    * Return a valid source location associated with the given @arg vmTraceIndex
    *
    * @param {String} address - contract address from which the source location is retrieved
@@ -67,8 +80,14 @@ export class SourceLocationTracker {
    * @param {Object} contractDetails - AST of compiled contracts
    */
   async getValidSourceLocationFromVMTraceIndex (address, vmtraceStepIndex, contracts) {
+    const amountOfSources = this.getTotalAmountOfSources(address, contracts)
     let map: Record<string, number> = { file: -1 }
-    while (vmtraceStepIndex >= 0 && map.file === -1) {
+    /*
+      (map.file === -1) this indicates that it isn't associated with a known source code
+      (map.file > amountOfSources - 1) this indicates the current file index exceed the total number of files.
+                                              this happens when generated sources should not be considered.
+    */
+    while (vmtraceStepIndex >= 0 && (map.file === -1 || map.file > amountOfSources - 1)) {
       map = await this.getSourceLocationFromVMTraceIndex(address, vmtraceStepIndex, contracts)
       vmtraceStepIndex = vmtraceStepIndex - 1
     }

libs/remix-debug/test/sourceLocationTracker.ts

@@ -54,9 +54,37 @@ tape('SourceLocationTracker', function (t) {
 
     traceManager.resolveTrace(tx).then(async () => {     
 
-      const sourceLocationTracker = new SourceLocationTracker(codeManager, { debugWithGeneratedSources: false })
       
+      
+      try {
+        // with debugWithGeneratedSources: false
+        const sourceLocationTracker = new SourceLocationTracker(codeManager, { debugWithGeneratedSources: false })
+
+        let map = await sourceLocationTracker.getSourceLocationFromVMTraceIndex('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5', 0, output.contracts)
+        console.log(map)
+        st.equal(map['file'], 0)
+        st.equal(map['start'], 35)
+
+        map = await sourceLocationTracker.getSourceLocationFromVMTraceIndex('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5', 45, output.contracts)
+        st.equal(map['file'], 1) // 1 refers to the generated source (pragma experimental ABIEncoderV2)
+        
+        map = await sourceLocationTracker.getValidSourceLocationFromVMTraceIndex('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5', 45, output.contracts)
+        st.equal(map['file'], 0) // 1 refers to the generated source (pragma experimental ABIEncoderV2)
+        st.equal(map['start'], 303)
+        st.equal(map['length'], 448)
+
+        map = await sourceLocationTracker.getValidSourceLocationFromVMTraceIndex('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5', 36, output.contracts)
+        st.equal(map['file'], 0) // 0 refers to the initial solidity code. see source below (ABIEncoderV2)
+        st.equal(map['start'], 303)
+        st.equal(map['length'], 448)
+      } catch (e) {
+        console.log(e)
+      }
+
       try {
+        // with debugWithGeneratedSources: true
+        const sourceLocationTracker = new SourceLocationTracker(codeManager, { debugWithGeneratedSources: true })
+        
         let map = await sourceLocationTracker.getSourceLocationFromVMTraceIndex('0x0d3a18d64dfe4f927832ab58d6451cecc4e517c5', 0, output.contracts)
         console.log(map)
         st.equal(map['file'], 0)