diff --git a/debian/.pbuilderrc b/debian/.pbuilderrc
index 34e88f696..a6fe1a129 100644
--- a/debian/.pbuilderrc
+++ b/debian/.pbuilderrc
@@ -3,10 +3,13 @@
 #
 # ubuntu:
 # prepare old (trusty or earlier) host system:
+
+# sudo ln -s gutsy /usr/share/debootstrap/scripts/eoan
 # sudo ln -s gutsy /usr/share/debootstrap/scripts/disco
 # sudo ln -s gutsy /usr/share/debootstrap/scripts/cosmic
 # sudo ln -s gutsy /usr/share/debootstrap/scripts/artful
 # sudo ln -s gutsy /usr/share/debootstrap/scripts/bionic
+# sudo ln -s sid /usr/share/debootstrap/scripts/buster
 # build ubuntu:
 # sudo DIST=trusty pbuilder create --configfile debian/.pbuilderrc && DIST=trusty pdebuild --configfile debian/.pbuilderrc
 # sudo DIST=xenial pbuilder create --configfile debian/.pbuilderrc && DIST=xenial pdebuild --configfile debian/.pbuilderrc
@@ -56,7 +59,7 @@ DEBIAN_SUITES=($UNSTABLE_CODENAME $TESTING_CODENAME $STABLE_CODENAME $STABLE_BAC
     "experimental" "unstable" "testing" "stable")
 
 # List of Ubuntu suites. Update these when needed.
-UBUNTU_SUITES=("disco" "cosmic" "bionic" "artful" "zesty" "xenial" "trusty" "devel")
+UBUNTU_SUITES=("eoan" "disco" "cosmic" "bionic" "artful" "zesty" "xenial" "trusty" "devel")
 
 # Set a default distribution if none is used. Note that you can set your own default (i.e. ${DIST:="unstable"}).
 HOST_DIST=`lsb_release --short --codename`
diff --git a/driver/connection.cpp b/driver/connection.cpp
index 6c8930863..11415b9fb 100644
--- a/driver/connection.cpp
+++ b/driver/connection.cpp
@@ -203,9 +203,13 @@ void Connection::loadConfiguration() {
         auto str = stringFromMYTCHAR(ci.trace);
         if (!str.empty())
             log_enabled = !(str == "0" || str == "No" || str == "no");
-        if (log_enabled && !tracefile.empty() && tracefile != log_file) {
+        if (log_enabled && !tracefile.empty() && (tracefile != log_file || !log_stream.is_open())) {
             log_file = tracefile;
             log_stream = std::ofstream(log_file, std::ios::out | std::ios::app);
+            if (!log_header.empty()) {
+                LOG(log_header);
+                log_header.clear();
+            }
         }
     }
     if (url.empty())
diff --git a/driver/environment.cpp b/driver/environment.cpp
index 20e6cd3b6..e4f30cdde 100644
--- a/driver/environment.cpp
+++ b/driver/environment.cpp
@@ -79,46 +79,49 @@ Environment::Environment() {
             LOG(std::endl << mbstr);
         }
 
-        std::string report;
-        report += " VERSION=" + std::string {VERSION_STRING};
+        log_header = " === Driver started ===";
+        log_header += " VERSION=" + std::string {VERSION_STRING};
 #if defined(_win64_)
-        report += " WIN64";
+        log_header += " WIN64";
 #elif defined(_win32_)
-        report += " WIN32";
+        log_header += " WIN32";
 #endif
 #if ODBC_IODBC
-        report += " ODBC_IODBC";
+        log_header += " ODBC_IODBC";
 #endif
 #if ODBC_CHAR16
-        report += " ODBC_CHAR16";
+        log_header += " ODBC_CHAR16";
 #endif
 #if ODBC_UNIXODBC
-        report += " ODBC_UNIXODBC";
+        log_header += " ODBC_UNIXODBC";
 #endif
 
 #if defined(UNICODE)
-        report += " UNICODE=" + std::to_string(UNICODE);
+        log_header += " UNICODE=" + std::to_string(UNICODE);
 #    if defined(ODBC_WCHAR)
-        report += " ODBC_WCHAR=" + std::to_string(ODBC_WCHAR);
+        log_header += " ODBC_WCHAR=" + std::to_string(ODBC_WCHAR);
 #    endif
-        report += " sizeof(SQLTCHAR)=" + std::to_string(sizeof(SQLTCHAR)) + " sizeof(wchar_t)=" + std::to_string(sizeof(wchar_t));
+        log_header += " sizeof(SQLTCHAR)=" + std::to_string(sizeof(SQLTCHAR)) + " sizeof(wchar_t)=" + std::to_string(sizeof(wchar_t));
 #endif
 #if defined(SQL_WCHART_CONVERT)
-        report += " SQL_WCHART_CONVERT";
+        log_header += " SQL_WCHART_CONVERT";
 #endif
 #if ODBCVER
         std::stringstream strm;
         strm << " ODBCVER=" << std::hex << ODBCVER << std::dec;
-        report += strm.str();
+        log_header += strm.str();
 #endif
 #if defined(ODBC_LIBRARIES)
-        report += " ODBC_LIBRARIES=" + std::string {ODBC_LIBRARIES};
+        log_header += " ODBC_LIBRARIES=" + std::string {ODBC_LIBRARIES};
 #endif
 #if defined(ODBC_INCLUDE_DIRECTORIES)
-        report += " ODBC_INCLUDE_DIRECTORIES=" + std::string {ODBC_INCLUDE_DIRECTORIES};
+        log_header += " ODBC_INCLUDE_DIRECTORIES=" + std::string {ODBC_INCLUDE_DIRECTORIES};
 #endif
 
-        LOG(" === Driver started ===" << report);
+        if (log_stream.is_open()) {
+            LOG(log_header);
+            log_header.clear();
+        }
     }
 }
 
diff --git a/driver/log/log.cpp b/driver/log/log.cpp
index 104a6bd26..0b27e079f 100644
--- a/driver/log/log.cpp
+++ b/driver/log/log.cpp
@@ -12,7 +12,8 @@ bool log_enabled =
     ;
 
 std::string log_file = LOG_DEFAULT_FILE;
-std::ofstream log_stream(log_file, std::ios::out | std::ios::app);
+std::ofstream log_stream = log_enabled ? std::ofstream(log_file, std::ios::out | std::ios::app) : std::ofstream();
+std::string log_header;
 
 std::chrono::high_resolution_clock hr_clock;
 
diff --git a/driver/log/log.h b/driver/log/log.h
index 2dbc45080..4e2586773 100644
--- a/driver/log/log.h
+++ b/driver/log/log.h
@@ -24,12 +24,14 @@ extern bool log_enabled;
 
 extern std::ofstream log_stream;
 extern std::string log_file;
+extern std::string log_header;
 
 std::ostream & log_prefix(std::ofstream & stream);
 
 #define LOG(message)                                                              \
     do {                                                                          \
-        if (log_enabled)                                                          \
+        if (log_enabled) {                                                         \
             log_prefix(log_stream);                                               \
-        log_stream << __FILE__ << ":" << __LINE__ << " " << message << std::endl; \
+            log_stream << __FILE__ << ":" << __LINE__ << " " << message << std::endl; \
+        } \
     } while (false)
diff --git a/driver/read_helpers.cpp b/driver/read_helpers.cpp
index 58cae1479..8d276ec6e 100644
--- a/driver/read_helpers.cpp
+++ b/driver/read_helpers.cpp
@@ -1,4 +1,5 @@
 #include "read_helpers.h"
+
 #include <stdexcept>
 
 void readSize(std::istream & istr, int32_t & res) {
@@ -20,5 +21,5 @@ void readString(std::istream & istr, std::string & res, bool * is_null) {
     }
 
     if (!istr.good())
-        throw std::runtime_error("Incomplete result received.");
+        throw std::runtime_error("Incomplete result received. Want size=" + std::to_string(size) + ".");
 }
diff --git a/driver/result_set.cpp b/driver/result_set.cpp
index 3572d876f..3b714c7e3 100644
--- a/driver/result_set.cpp
+++ b/driver/result_set.cpp
@@ -246,7 +246,3 @@ bool ResultSet::readNextBlock() {
     iterator = current_block.data.begin();
     return !current_block.data.empty();
 }
-
-void ResultSet::throwIncompleteResult() const {
-    throw std::runtime_error("Incomplete result received.");
-}
diff --git a/driver/result_set.h b/driver/result_set.h
index 91258bf5b..7bc052490 100644
--- a/driver/result_set.h
+++ b/driver/result_set.h
@@ -82,8 +82,6 @@ class ResultSet {
 private:
     std::istream & in();
 
-    void throwIncompleteResult() const;
-
     bool readNextBlock();
     bool readNextBlockCache();
 
diff --git a/driver/utils.h b/driver/utils.h
index 0ca9d0db5..33180c81b 100644
--- a/driver/utils.h
+++ b/driver/utils.h
@@ -182,9 +182,6 @@ RETCODE fillOutputStringImpl(
             *out_value_length = symbols;
     }
 
-LOG("fillOutputStringImpl: " << symbols << " = " /* << value*/ );
-
-
     if (out_value_max_length < 0)
         return SQL_ERROR;
 
diff --git a/test/test_all.sh b/test/test_all.sh
index c02e8f01d..87dd162b4 100755
--- a/test/test_all.sh
+++ b/test/test_all.sh
@@ -6,14 +6,14 @@
 set -x
 
 cd ..
-for compiler in "" _gcc _clang; do
+for compiler in ${USE_COMPILER=_gcc _clang}; do
     if [ "$compiler" = "_clang" ]; then
-        CMAKE_COMPILER_FLAGS="-DCMAKE_CXX_COMPILER=`which clang++-7 clang++-6.0 clang++-5.0 clang++60 clang++50 clang++ | head -n1` -DCMAKE_C_COMPILER=`which clang-7 clang-6.0 clang-5.0 clang60 clang50 clang | head -n1`"
+        CMAKE_COMPILER_FLAGS="-DCMAKE_CXX_COMPILER=`which clang++-8 clang++-7 clang++-6.0 clang++-5.0 clang++60 clang++50 clang++ | head -n1` -DCMAKE_C_COMPILER=`which clang-8 clang-7 clang-6.0 clang-5.0 clang60 clang50 clang | head -n1`"
     fi
     if [ "$compiler" = "_gcc" ]; then
-        CMAKE_COMPILER_FLAGS="-DCMAKE_CXX_COMPILER=`which g++-8 g++-7 g++8 g++7 g++ | head -n1` -DCMAKE_C_COMPILER=`which gcc-8 gcc-7 gcc8 gcc7 gcc | head -n1`"
+        CMAKE_COMPILER_FLAGS="-DCMAKE_CXX_COMPILER=`which g++-9 g++-8 g++-7 g++9 g++8 g++7 g++ | head -n1` -DCMAKE_C_COMPILER=`which gcc-9 gcc-8 gcc-7 gcc9 gcc8 gcc7 gcc | head -n1`"
     fi
-    for type in ${USE_TYPES=debug asan tsan ubsan release relwithdebinfo}; do
+    for type in ${USE_TYPE=debug asan tsan ubsan release relwithdebinfo}; do
       for option in ""; do
         CTEST_ENV0=""
         if [ "$type" = "asan" ]; then
diff --git a/test/test_unicode.sh b/test/test_unicode.sh
index a808ca32f..16ced2d2a 100755
--- a/test/test_unicode.sh
+++ b/test/test_unicode.sh
@@ -42,15 +42,14 @@ elif [ `which apt` ]; then
         sudo apt install -y unixodbc-dev unixodbc
     fi
 fi
-
   for compiler in ""; do
     if [ "$compiler" = "_clang" ]; then
-        CMAKE_COMPILER_FLAGS="-DCMAKE_CXX_COMPILER=`which clang++-6.0 clang++-5.0 clang++60 clang++50 clang++ | head -n1` -DCMAKE_C_COMPILER=`which clang-6.0 clang-5.0 clang60 clang50 clang | head -n1`"
+        CMAKE_COMPILER_FLAGS="-DCMAKE_CXX_COMPILER=`which clang++-8 clang++-7 clang++-6.0 clang++-5.0 clang++60 clang++50 clang++ | head -n1` -DCMAKE_C_COMPILER=`which clang-8 clang-7 clang-6.0 clang-5.0 clang60 clang50 clang | head -n1`"
     fi
     if [ "$compiler" = "_gcc" ]; then
-        CMAKE_COMPILER_FLAGS="-DCMAKE_CXX_COMPILER=`which g++-8 g++-7 g++8 g++7 g++ | head -n1` -DCMAKE_C_COMPILER=`which gcc-7 gcc-8 gcc8 gcc7 gcc | head -n1`"
+        CMAKE_COMPILER_FLAGS="-DCMAKE_CXX_COMPILER=`which g++-9 g++-8 g++-7 g++9 g++8 g++7 g++ | head -n1` -DCMAKE_C_COMPILER=`which gcc-9 gcc-8 gcc-7 gcc9 gcc8 gcc7 gcc | head -n1`"
     fi
-    for type in debug; do
+    for type in ${USE_TYPE=debug}; do
       for option in ""; do
         build_dir=build${compiler}_$type$option
         echo build $compiler $type $option in ${build_dir}