later entry in build log should overwrite earlier one

2 files changed, 17 insertions, 1 deletions

diff --git a/src/build_log.cc b/src/build_log.cc
index ba09b46..65567da 100644
--- a/src/build_log.cc
+++ b/src/build_log.cc
@@ -76,7 +76,7 @@ bool BuildLog::Load(const string& path, string* err) {
     start = end + 1;
     end = strchr(start, '\n');
     entry->command = string(start, end - start);
-    log_.insert(make_pair(entry->output, entry));
+    log_[entry->output] = entry;
   }
 
   return true;
diff --git a/src/build_log_test.cc b/src/build_log_test.cc
index 6807a04..11c0e09 100644
--- a/src/build_log_test.cc
+++ b/src/build_log_test.cc
@@ -41,3 +41,19 @@ TEST_F(BuildLogTest, WriteRead) {
   ASSERT_EQ(15, e1->time_ms);
   ASSERT_EQ("out", e1->output);
 }
+
+TEST_F(BuildLogTest, DoubleEntry) {
+  FILE* f = fopen(log_filename_.c_str(), "wb");
+  fprintf(f, "0 out command abc\n");
+  fprintf(f, "0 out command def\n");
+  fclose(f);
+
+  string err;
+  BuildLog log;
+  EXPECT_TRUE(log.Load(log_filename_, &err));
+  ASSERT_EQ("", err);
+
+  BuildLog::LogEntry* e = log.LookupByOutput("out");
+  ASSERT_TRUE(e);
+  ASSERT_EQ("command def", e->command);
+}