Throw error when source location is missing

1 files changed, 6 insertions, 2 deletions

diff --git a/packages/sol-tracing-utils/src/source_maps.ts b/packages/sol-tracing-utils/src/source_maps.ts
index af0fb4035..ceb20d843 100644
--- a/packages/sol-tracing-utils/src/source_maps.ts
+++ b/packages/sol-tracing-utils/src/source_maps.ts
@@ -67,13 +67,17 @@ export function parseSourceMap(
             fileIndex,
         };
         if (parsedEntry.fileIndex !== -1 && !_.isUndefined(locationByOffsetByFileIndex[parsedEntry.fileIndex])) {
+            const locationByOffset = locationByOffsetByFileIndex[parsedEntry.fileIndex];
             const sourceRange = {
                 location: {
-                    start: locationByOffsetByFileIndex[parsedEntry.fileIndex][parsedEntry.offset],
-                    end: locationByOffsetByFileIndex[parsedEntry.fileIndex][parsedEntry.offset + parsedEntry.length],
+                    start: locationByOffset[parsedEntry.offset],
+                    end: locationByOffset[parsedEntry.offset + parsedEntry.length],
                 },
                 fileName: sources[parsedEntry.fileIndex],
             };
+            if (sourceRange.location.start === undefined || sourceRange.location.end === undefined) {
+                throw new Error(`Error while processing sourcemap: location out of range in ${sourceRange.fileName}`);
+            }
             instructionIndexToSourceRange[i] = sourceRange;
         } else {
             // Some assembly code generated by Solidity can't be mapped back to a line of source code.