Can't log to debug log before chain params initialized

Add a function `AreBaseParamsConfigured` and use this to check
before writing to the debug log. This avoids assertions when the
application happens to log too early, which happens in the GUI.

Messages logged before the base parameters are configured can be
shown using `-printtoconsole`.

3 files changed, 11 insertions, 1 deletions

diff --git a/src/chainparamsbase.cpp b/src/chainparamsbase.cpp
index 19a9e72cc9..720e24c4a8 100644
--- a/src/chainparamsbase.cpp
+++ b/src/chainparamsbase.cpp
@@ -91,3 +91,7 @@ bool SelectBaseParamsFromCommandLine() {
     }
     return true;
 }
+
+bool AreBaseParamsConfigured() {
+    return pCurrentBaseParams != NULL;
+}
diff --git a/src/chainparamsbase.h b/src/chainparamsbase.h
index 4a3b268909..4398f69548 100644
--- a/src/chainparamsbase.h
+++ b/src/chainparamsbase.h
@@ -49,4 +49,10 @@ void SelectBaseParams(CBaseChainParams::Network network);
  */
 bool SelectBaseParamsFromCommandLine();
 
+/**
+ * Return true if SelectBaseParamsFromCommandLine() has been called to select
+ * a network.
+ */
+bool AreBaseParamsConfigured();
+
 #endif
diff --git a/src/util.cpp b/src/util.cpp
index ce31619eca..d3fa5182f3 100644
--- a/src/util.cpp
+++ b/src/util.cpp
@@ -205,7 +205,7 @@ int LogPrintStr(const std::string &str)
         // print to console
         ret = fwrite(str.data(), 1, str.size(), stdout);
     }
-    else if (fPrintToDebugLog)
+    else if (fPrintToDebugLog && AreBaseParamsConfigured())
     {
         static bool fStartedNewLine = true;
         boost::call_once(&DebugPrintInit, debugPrintInitFlag);