[taler-wallet-core] 04/05: idb-bridge: fix deletion

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dold pushed a commit to branch master
in repository wallet-core.

commit e8f362ccfea683fe16ce68b956f068ffa0b001b1
Author: Florian Dold <address@hidden>
AuthorDate: Thu Nov 21 20:39:53 2019 +0100

    idb-bridge: fix deletion
---
 packages/idb-bridge/package.json         |  2 +-
 packages/idb-bridge/src/MemoryBackend.ts | 12 ++++++++++--
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/packages/idb-bridge/package.json b/packages/idb-bridge/package.json
index 19c28245..6df8ab34 100644
--- a/packages/idb-bridge/package.json
+++ b/packages/idb-bridge/package.json
@@ -1,6 +1,6 @@
 {
   "name": "idb-bridge",
-  "version": "0.0.13",
+  "version": "0.0.14",
   "description": "IndexedDB implementation that uses SQLite3 as storage",
   "main": "./build/index.js",
   "types": "./build/index.d.ts",
diff --git a/packages/idb-bridge/src/MemoryBackend.ts 
b/packages/idb-bridge/src/MemoryBackend.ts
index 792ae4cd..cee06197 100644
--- a/packages/idb-bridge/src/MemoryBackend.ts
+++ b/packages/idb-bridge/src/MemoryBackend.ts
@@ -871,14 +871,22 @@ export class MemoryBackend implements Backend {
     } else {
       currKey = range.lower;
       // We have a range with an lowerOpen lower bound, so don't start
-      // deleting the upper bound.  Instead start with the next higher key.
+      // deleting the lower bound.  Instead start with the next higher key.
       if (range.lowerOpen && currKey !== undefined) {
         currKey = modifiedData.nextHigherKey(currKey);
       }
     }
 
-    // invariant: (currKey is undefined) or (currKey is a valid key)
+    // make sure that currKey is either undefined or pointing to an
+    // existing object.
+    let firstValue = modifiedData.get(currKey);
+    if (!firstValue) {
+      if (currKey !== undefined) {
+        currKey = modifiedData.nextHigherKey(currKey);
+      }
+    }
 
+    // loop invariant: (currKey is undefined) or (currKey is a valid key)
     while (true) {
       if (currKey === undefined) {
         // nothing more to delete!

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