diff --git a/poky/bitbake/lib/bb/build.py b/poky/bitbake/lib/bb/build.py
index 23b6ee4..94f9cb3 100644
--- a/poky/bitbake/lib/bb/build.py
+++ b/poky/bitbake/lib/bb/build.py
@@ -16,7 +16,9 @@
 import sys
 import logging
 import glob
+import itertools
 import time
+import re
 import stat
 import bb
 import bb.msg
@@ -303,20 +305,60 @@
 
 def shell_trap_code():
     return '''#!/bin/sh\n
+__BITBAKE_LAST_LINE=0
+
 # Emit a useful diagnostic if something fails:
-bb_exit_handler() {
+bb_sh_exit_handler() {
     ret=$?
-    case $ret in
-    0)  ;;
-    *)  case $BASH_VERSION in
-        "") echo "WARNING: exit code $ret from a shell command.";;
-        *)  echo "WARNING: ${BASH_SOURCE[0]}:${BASH_LINENO[0]} exit $ret from '$BASH_COMMAND'";;
-        esac
-        exit $ret
-    esac
+    if [ "$ret" != 0 ]; then
+        echo "WARNING: exit code $ret from a shell command."
+    fi
+    exit $ret
 }
-trap 'bb_exit_handler' 0
-set -e
+
+bb_bash_exit_handler() {
+    ret=$?
+    { set +x; } > /dev/null
+    trap "" DEBUG
+    if [ "$ret" != 0 ]; then
+        echo "WARNING: ${BASH_SOURCE[0]}:${__BITBAKE_LAST_LINE} exit $ret from '$1'"
+
+        echo "WARNING: Backtrace (BB generated script): "
+        for i in $(seq 1 $((${#FUNCNAME[@]} - 1))); do
+            if [ "$i" -eq 1 ]; then
+                echo -e "\t#$((i)): ${FUNCNAME[$i]}, ${BASH_SOURCE[$((i-1))]}, line ${__BITBAKE_LAST_LINE}"
+            else
+                echo -e "\t#$((i)): ${FUNCNAME[$i]}, ${BASH_SOURCE[$((i-1))]}, line ${BASH_LINENO[$((i-1))]}"
+            fi
+        done
+    fi
+    exit $ret
+}
+
+bb_bash_debug_handler() {
+    local line=${BASH_LINENO[0]}
+    # For some reason the DEBUG trap trips with lineno=1 when scripts exit; ignore it
+    if [ "$line" -eq 1 ]; then
+        return
+    fi
+
+    # Track the line number of commands as they execute. This is so we can have access to the failing line number
+    # in the EXIT trap. See http://gnu-bash.2382.n7.nabble.com/trap-echo-quot-trap-exit-on-LINENO-quot-EXIT-gt-wrong-linenumber-td3666.html
+    if [ "${FUNCNAME[1]}" != "bb_bash_exit_handler" ]; then
+        __BITBAKE_LAST_LINE=$line
+    fi
+}
+
+case $BASH_VERSION in
+"") trap 'bb_sh_exit_handler' 0
+    set -e
+    ;;
+*)  trap 'bb_bash_exit_handler "$BASH_COMMAND"' 0
+    trap '{ bb_bash_debug_handler; } 2>/dev/null' DEBUG
+    set -e
+    shopt -s extdebug
+    ;;
+esac
 '''
 
 def create_progress_handler(func, progress, logfile, d):
@@ -346,7 +388,7 @@
             cls_obj = functools.reduce(resolve, cls.split("."), bb.utils._context)
             if not cls_obj:
                 # Fall-back on __builtins__
-                cls_obj = functools.reduce(lambda x, y: x.get(y), cls.split("."), __builtins__)
+                cls_obj = functools.reduce(resolve, cls.split("."), __builtins__)
             if cls_obj:
                 return cls_obj(d, outfile=logfile, otherargs=otherargs)
             bb.warn('%s: unknown custom progress handler in task progress varflag value "%s", ignoring' % (func, cls))
@@ -398,7 +440,13 @@
 
     progress = d.getVarFlag(func, 'progress')
     if progress:
-        logfile = create_progress_handler(func, progress, logfile, d)
+        try:
+            logfile = create_progress_handler(func, progress, logfile, d)
+        except:
+            from traceback import format_exc
+            logger.error("Failed to create progress handler")
+            logger.error(format_exc())
+            raise
 
     fifobuffer = bytearray()
     def readfifo(data):
@@ -450,6 +498,62 @@
             bb.debug(2, "Executing shell function %s" % func)
             with open(os.devnull, 'r+') as stdin, logfile:
                 bb.process.run(cmd, shell=False, stdin=stdin, log=logfile, extrafiles=[(fifo,readfifo)])
+        except bb.process.ExecutionError as exe:
+            # Find the backtrace that the shell trap generated
+            backtrace_marker_regex = re.compile(r"WARNING: Backtrace \(BB generated script\)")
+            stdout_lines = (exe.stdout or "").split("\n")
+            backtrace_start_line = None
+            for i, line in enumerate(reversed(stdout_lines)):
+                if backtrace_marker_regex.search(line):
+                    backtrace_start_line = len(stdout_lines) - i
+                    break
+
+            # Read the backtrace frames, starting at the location we just found
+            backtrace_entry_regex = re.compile(r"#(?P<frameno>\d+): (?P<funcname>[^\s]+), (?P<file>.+?), line ("
+                                               r"?P<lineno>\d+)")
+            backtrace_frames = []
+            if backtrace_start_line:
+                for line in itertools.islice(stdout_lines, backtrace_start_line, None):
+                    match = backtrace_entry_regex.search(line)
+                    if match:
+                        backtrace_frames.append(match.groupdict())
+
+            with open(runfile, "r") as script:
+                script_lines = [line.rstrip() for line in script.readlines()]
+
+            # For each backtrace frame, search backwards in the script (from the line number called out by the frame),
+            # to find the comment that emit_vars injected when it wrote the script. This will give us the metadata
+            # filename (e.g. .bb or .bbclass) and line number where the shell function was originally defined.
+            script_metadata_comment_regex = re.compile(r"# line: (?P<lineno>\d+), file: (?P<file>.+)")
+            better_frames = []
+            # Skip the very last frame since it's just the call to the shell task in the body of the script
+            for frame in backtrace_frames[:-1]:
+                # Check whether the frame corresponds to a function defined in the script vs external script.
+                if os.path.samefile(frame["file"], runfile):
+                    # Search backwards from the frame lineno to locate the comment that BB injected
+                    i = int(frame["lineno"]) - 1
+                    while i >= 0:
+                        match = script_metadata_comment_regex.match(script_lines[i])
+                        if match:
+                            # Calculate the relative line in the function itself
+                            relative_line_in_function = int(frame["lineno"]) - i - 2
+                            # Calculate line in the function as declared in the metadata
+                            metadata_function_line = relative_line_in_function + int(match["lineno"])
+                            better_frames.append("#{frameno}: {funcname}, {file}, line {lineno}".format(
+                                frameno=frame["frameno"],
+                                funcname=frame["funcname"],
+                                file=match["file"],
+                                lineno=metadata_function_line
+                            ))
+                            break
+                        i -= 1
+                else:
+                    better_frames.append("#{frameno}: {funcname}, {file}, line {lineno}".format(**frame))
+
+            if better_frames:
+                better_frames = ("\t{0}".format(frame) for frame in better_frames)
+                exe.extra_message = "\nBacktrace (metadata-relative locations):\n{0}".format("\n".join(better_frames))
+            raise
         finally:
             os.unlink(fifopath)
 
diff --git a/poky/bitbake/lib/bb/command.py b/poky/bitbake/lib/bb/command.py
index 805ed92..4d152ff 100644
--- a/poky/bitbake/lib/bb/command.py
+++ b/poky/bitbake/lib/bb/command.py
@@ -84,7 +84,7 @@
         if command not in CommandsAsync.__dict__:
             return None, "No such command"
         self.currentAsyncCommand = (command, commandline)
-        self.cooker.configuration.server_register_idlecallback(self.cooker.runCommands, self.cooker)
+        self.cooker.idleCallBackRegister(self.cooker.runCommands, self.cooker)
         return True, None
 
     def runAsyncCommand(self):
@@ -723,10 +723,10 @@
         """
         Find signature info files via the signature generator
         """
-        pn = params[0]
+        (mc, pn) = bb.runqueue.split_mc(params[0])
         taskname = params[1]
         sigs = params[2]
-        res = bb.siggen.find_siginfo(pn, taskname, sigs, command.cooker.data)
-        bb.event.fire(bb.event.FindSigInfoResult(res), command.cooker.data)
+        res = bb.siggen.find_siginfo(pn, taskname, sigs, command.cooker.databuilder.mcdata[mc])
+        bb.event.fire(bb.event.FindSigInfoResult(res), command.cooker.databuilder.mcdata[mc])
         command.finishAsyncCommand()
     findSigInfo.needcache = False
diff --git a/poky/bitbake/lib/bb/cooker.py b/poky/bitbake/lib/bb/cooker.py
index f6abc63..9123605 100644
--- a/poky/bitbake/lib/bb/cooker.py
+++ b/poky/bitbake/lib/bb/cooker.py
@@ -148,7 +148,7 @@
     Manages one bitbake build run
     """
 
-    def __init__(self, configuration, featureSet=None):
+    def __init__(self, configuration, featureSet=None, idleCallBackRegister=None):
         self.recipecaches = None
         self.skiplist = {}
         self.featureset = CookerFeatures()
@@ -158,6 +158,8 @@
 
         self.configuration = configuration
 
+        self.idleCallBackRegister = idleCallBackRegister
+
         bb.debug(1, "BBCooker starting %s" % time.time())
         sys.stdout.flush()
 
@@ -210,7 +212,7 @@
             cooker.process_inotify_updates()
             return 1.0
 
-        self.configuration.server_register_idlecallback(_process_inotify_updates, self)
+        self.idleCallBackRegister(_process_inotify_updates, self)
 
         # TOSTOP must not be set or our children will hang when they output
         try:
@@ -1423,7 +1425,7 @@
                 return True
             return retval
 
-        self.configuration.server_register_idlecallback(buildFileIdle, rq)
+        self.idleCallBackRegister(buildFileIdle, rq)
 
     def buildTargets(self, targets, task):
         """
@@ -1494,7 +1496,7 @@
         if 'universe' in targets:
             rq.rqdata.warn_multi_bb = True
 
-        self.configuration.server_register_idlecallback(buildTargetsIdle, rq)
+        self.idleCallBackRegister(buildTargetsIdle, rq)
 
 
     def getAllKeysWithFlags(self, flaglist):
diff --git a/poky/bitbake/lib/bb/cookerdata.py b/poky/bitbake/lib/bb/cookerdata.py
index 24bf09c..b86e7d4 100644
--- a/poky/bitbake/lib/bb/cookerdata.py
+++ b/poky/bitbake/lib/bb/cookerdata.py
@@ -143,16 +143,10 @@
                 setattr(self, key, parameters.options.__dict__[key])
         self.env = parameters.environment.copy()
 
-    def setServerRegIdleCallback(self, srcb):
-        self.server_register_idlecallback = srcb
-
     def __getstate__(self):
         state = {}
         for key in self.__dict__.keys():
-            if key == "server_register_idlecallback":
-                state[key] = None
-            else:
-                state[key] = getattr(self, key)
+            state[key] = getattr(self, key)
         return state
 
     def __setstate__(self,state):
diff --git a/poky/bitbake/lib/bb/data.py b/poky/bitbake/lib/bb/data.py
index b0683c5..9702285 100644
--- a/poky/bitbake/lib/bb/data.py
+++ b/poky/bitbake/lib/bb/data.py
@@ -161,6 +161,12 @@
         return True
 
     if func:
+        # Write a comment indicating where the shell function came from (line number and filename) to make it easier
+        # for the user to diagnose task failures. This comment is also used by build.py to determine the metadata
+        # location of shell functions.
+        o.write("# line: {0}, file: {1}\n".format(
+            d.getVarFlag(var, "lineno", False),
+            d.getVarFlag(var, "filename", False)))
         # NOTE: should probably check for unbalanced {} within the var
         val = val.rstrip('\n')
         o.write("%s() {\n%s\n}\n" % (varExpanded, val))
diff --git a/poky/bitbake/lib/bb/process.py b/poky/bitbake/lib/bb/process.py
index 2dc472a..f36c929 100644
--- a/poky/bitbake/lib/bb/process.py
+++ b/poky/bitbake/lib/bb/process.py
@@ -41,6 +41,7 @@
         self.exitcode = exitcode
         self.stdout = stdout
         self.stderr = stderr
+        self.extra_message = None
 
     def __str__(self):
         message = ""
@@ -51,7 +52,7 @@
         if message:
             message = ":\n" + message
         return (CmdError.__str__(self) +
-                " with exit code %s" % self.exitcode + message)
+                " with exit code %s" % self.exitcode + message + (self.extra_message or ""))
 
 class Popen(subprocess.Popen):
     defaults = {
diff --git a/poky/bitbake/lib/bb/progress.py b/poky/bitbake/lib/bb/progress.py
index 9c755b7..d051ba0 100644
--- a/poky/bitbake/lib/bb/progress.py
+++ b/poky/bitbake/lib/bb/progress.py
@@ -14,7 +14,27 @@
 import bb.build
 from bb.build import StdoutNoopContextManager
 
-class ProgressHandler(object):
+
+# from https://stackoverflow.com/a/14693789/221061
+ANSI_ESCAPE_REGEX = re.compile(r'\x1B\[[0-?]*[ -/]*[@-~]')
+
+
+def filter_color(string):
+    """
+    Filter ANSI escape codes out of |string|, return new string
+    """
+    return ANSI_ESCAPE_REGEX.sub('', string)
+
+
+def filter_color_n(string):
+    """
+    Filter ANSI escape codes out of |string|, returns tuple of
+    (new string, # of ANSI codes removed)
+    """
+    return ANSI_ESCAPE_REGEX.subn('', string)
+
+
+class ProgressHandler:
     """
     Base class that can pretend to be a file object well enough to be
     used to build objects to intercept console output and determine the
@@ -55,6 +75,7 @@
             self._lastevent = ts
             self._progress = progress
 
+
 class LineFilterProgressHandler(ProgressHandler):
     """
     A ProgressHandler variant that provides the ability to filter out
@@ -66,7 +87,7 @@
     """
     def __init__(self, d, outfile=None):
         self._linebuffer = ''
-        super(LineFilterProgressHandler, self).__init__(d, outfile)
+        super().__init__(d, outfile)
 
     def write(self, string):
         self._linebuffer += string
@@ -80,41 +101,44 @@
             lbreakpos = line.rfind('\r') + 1
             if lbreakpos:
                 line = line[lbreakpos:]
-            if self.writeline(line):
-                super(LineFilterProgressHandler, self).write(line)
+            if self.writeline(filter_color(line)):
+                super().write(line)
 
     def writeline(self, line):
         return True
 
+
 class BasicProgressHandler(ProgressHandler):
     def __init__(self, d, regex=r'(\d+)%', outfile=None):
-        super(BasicProgressHandler, self).__init__(d, outfile)
+        super().__init__(d, outfile)
         self._regex = re.compile(regex)
         # Send an initial progress event so the bar gets shown
         self._fire_progress(0)
 
     def write(self, string):
-        percs = self._regex.findall(string)
+        percs = self._regex.findall(filter_color(string))
         if percs:
             progress = int(percs[-1])
             self.update(progress)
-        super(BasicProgressHandler, self).write(string)
+        super().write(string)
+
 
 class OutOfProgressHandler(ProgressHandler):
     def __init__(self, d, regex, outfile=None):
-        super(OutOfProgressHandler, self).__init__(d, outfile)
+        super().__init__(d, outfile)
         self._regex = re.compile(regex)
         # Send an initial progress event so the bar gets shown
         self._fire_progress(0)
 
     def write(self, string):
-        nums = self._regex.findall(string)
+        nums = self._regex.findall(filter_color(string))
         if nums:
             progress = (float(nums[-1][0]) / float(nums[-1][1])) * 100
             self.update(progress)
-        super(OutOfProgressHandler, self).write(string)
+        super().write(string)
 
-class MultiStageProgressReporter(object):
+
+class MultiStageProgressReporter:
     """
     Class which allows reporting progress without the caller
     having to know where they are in the overall sequence. Useful
@@ -199,6 +223,7 @@
           value is considered to be out of stage_total, otherwise it should
           be a percentage value from 0 to 100.
         """
+        progress = None
         if self._stage_total:
             stage_progress = (float(stage_progress) / self._stage_total) * 100
         if self._stage < 0:
@@ -207,9 +232,10 @@
             progress = self._base_progress + (stage_progress * self._stage_weights[self._stage])
         else:
             progress = self._base_progress
-        if progress > 100:
-            progress = 100
-        self._fire_progress(progress)
+        if progress:
+            if progress > 100:
+                progress = 100
+            self._fire_progress(progress)
 
     def finish(self):
         if self._finished:
@@ -230,6 +256,7 @@
                     out.append('Up to finish: %d' % stage_weight)
             bb.warn('Stage times:\n  %s' % '\n  '.join(out))
 
+
 class MultiStageProcessProgressReporter(MultiStageProgressReporter):
     """
     Version of MultiStageProgressReporter intended for use with
@@ -238,7 +265,7 @@
     def __init__(self, d, processname, stage_weights, debug=False):
         self._processname = processname
         self._started = False
-        MultiStageProgressReporter.__init__(self, d, stage_weights, debug)
+        super().__init__(d, stage_weights, debug)
 
     def start(self):
         if not self._started:
@@ -255,13 +282,14 @@
         MultiStageProgressReporter.finish(self)
         bb.event.fire(bb.event.ProcessFinished(self._processname), self._data)
 
+
 class DummyMultiStageProcessProgressReporter(MultiStageProgressReporter):
     """
     MultiStageProcessProgressReporter that takes the calls and does nothing
     with them (to avoid a bunch of "if progress_reporter:" checks)
     """
     def __init__(self):
-        MultiStageProcessProgressReporter.__init__(self, "", None, [])
+        super().__init__(None, [])
 
     def _fire_progress(self, taskprogress, rate=None):
         pass
diff --git a/poky/bitbake/lib/bb/server/process.py b/poky/bitbake/lib/bb/server/process.py
index 9ec79f5..65e1eab 100644
--- a/poky/bitbake/lib/bb/server/process.py
+++ b/poky/bitbake/lib/bb/server/process.py
@@ -34,12 +34,11 @@
 class ProcessTimeout(SystemExit):
     pass
 
-class ProcessServer(multiprocessing.Process):
+class ProcessServer():
     profile_filename = "profile.log"
     profile_processed_filename = "profile.log.processed"
 
-    def __init__(self, lock, sock, sockname):
-        multiprocessing.Process.__init__(self)
+    def __init__(self, lock, sock, sockname, server_timeout, xmlrpcinterface):
         self.command_channel = False
         self.command_channel_reply = False
         self.quit = False
@@ -47,6 +46,7 @@
         self.next_heartbeat = time.time()
 
         self.event_handle = None
+        self.hadanyui = False
         self.haveui = False
         self.maxuiwait = 30
         self.xmlrpc = False
@@ -57,6 +57,9 @@
         self.sock = sock
         self.sockname = sockname
 
+        self.server_timeout = server_timeout
+        self.xmlrpcinterface = xmlrpcinterface
+
     def register_idle_function(self, function, data):
         """Register a function to be called while the server is idle"""
         assert hasattr(function, '__call__')
@@ -188,6 +191,7 @@
                     self.command_channel_reply = writer
 
                     self.haveui = True
+                    self.hadanyui = True
 
                 except (EOFError, OSError):
                     disconnect_client(self, fds)
@@ -200,7 +204,7 @@
             # If we don't see a UI connection within maxuiwait, its unlikely we're going to see
             # one. We have had issue with processes hanging indefinitely so timing out UI-less
             # servers is useful.
-            if not self.haveui and not self.timeout and (self.lastui + self.maxuiwait) < time.time():
+            if not self.hadanyui and not self.xmlrpc and not self.timeout and (self.lastui + self.maxuiwait) < time.time():
                 print("No UI connection within max timeout, exiting to avoid infinite loop.")
                 self.quit = True
 
@@ -243,6 +247,10 @@
 
         self.cooker.post_serve()
 
+        # Flush logs before we release the lock
+        sys.stdout.flush()
+        sys.stderr.flush()
+
         # Finally release the lockfile but warn about other processes holding it open
         lock = self.bitbake_lock
         lockfile = lock.name
@@ -465,23 +473,25 @@
         print(self.start_log_format % (os.getpid(), datetime.datetime.now().strftime(self.start_log_datetime_format)))
         sys.stdout.flush()
 
-        server = ProcessServer(self.bitbake_lock, self.sock, self.sockname)
-        self.configuration.setServerRegIdleCallback(server.register_idle_function)
-        os.close(self.readypipe)
-        writer = ConnectionWriter(self.readypipein)
         try:
-            self.cooker = bb.cooker.BBCooker(self.configuration, self.featureset)
-        except bb.BBHandledException:
-            return None
-        writer.send("r")
-        writer.close()
-        server.cooker = self.cooker
-        server.server_timeout = self.configuration.server_timeout
-        server.xmlrpcinterface = self.configuration.xmlrpcinterface
-        print("Started bitbake server pid %d" % os.getpid())
-        sys.stdout.flush()
+            server = ProcessServer(self.bitbake_lock, self.sock, self.sockname, self.configuration.server_timeout, self.configuration.xmlrpcinterface)
+            os.close(self.readypipe)
+            writer = ConnectionWriter(self.readypipein)
+            try:
+                self.cooker = bb.cooker.BBCooker(self.configuration, self.featureset, server.register_idle_function)
+            except bb.BBHandledException:
+                return None
+            writer.send("r")
+            writer.close()
+            server.cooker = self.cooker
+            print("Started bitbake server pid %d" % os.getpid())
+            sys.stdout.flush()
 
-        server.start()
+            server.run()
+        finally:
+            # Flush any ,essages/errors to the logfile before exit
+            sys.stdout.flush()
+            sys.stderr.flush()
 
 def connectProcessServer(sockname, featureset):
     # Connect to socket
diff --git a/poky/bitbake/lib/bb/tests/color.py b/poky/bitbake/lib/bb/tests/color.py
new file mode 100644
index 0000000..bf03750
--- /dev/null
+++ b/poky/bitbake/lib/bb/tests/color.py
@@ -0,0 +1,95 @@
+#
+# BitBake Test for ANSI color code filtering
+#
+# Copyright (C) 2020  Agilent Technologies, Inc.
+# Author: Chris Laplante <chris.laplante@agilent.com>
+#
+# SPDX-License-Identifier: MIT
+#
+
+import unittest
+import bb.progress
+import bb.data
+import bb.event
+from bb.progress import filter_color, filter_color_n
+import io
+import re
+
+
+class ProgressWatcher:
+    def __init__(self):
+        self._reports = []
+
+    def handle_event(self, event):
+        self._reports.append((event.progress, event.rate))
+
+    def reports(self):
+        return self._reports
+
+
+class ColorCodeTests(unittest.TestCase):
+    def setUp(self):
+        self.d = bb.data.init()
+        self._progress_watcher = ProgressWatcher()
+        bb.event.register("bb.build.TaskProgress", self._progress_watcher.handle_event)
+
+    def tearDown(self):
+        bb.event.remove("bb.build.TaskProgress", None)
+
+    def test_filter_color(self):
+        input_string = "[01;35m[K~~~~~~~~~~~~^~~~~~~~[m[K"
+        filtered = filter_color(input_string)
+        self.assertEqual(filtered, "~~~~~~~~~~~~^~~~~~~~")
+
+    def test_filter_color_n(self):
+        input_string = "[01;35m[K~~~~~~~~~~~~^~~~~~~~[m[K"
+        filtered, code_count = filter_color_n(input_string)
+        self.assertEqual(filtered, "~~~~~~~~~~~~^~~~~~~~")
+        self.assertEqual(code_count, 4)
+
+    def test_LineFilterProgressHandler_color_filtering(self):
+        class CustomProgressHandler(bb.progress.LineFilterProgressHandler):
+            PROGRESS_REGEX = re.compile(r"Progress: (?P<progress>\d+)%")
+
+            def writeline(self, line):
+                match = self.PROGRESS_REGEX.match(line)
+                if match:
+                    self.update(int(match.group("progress")))
+                    return False
+                return True
+
+        buffer = io.StringIO()
+        handler = CustomProgressHandler(self.d, buffer)
+        handler.write("Program output!\n")
+        handler.write("More output!\n")
+        handler.write("Progress: [01;35m[K10[m[K%\n") # 10%
+        handler.write("Even more\n")
+        handler.write("[01;35m[KProgress: 50[m[K%\n") # 50%
+        handler.write("[01;35m[KProgress: 60[m[K%\n") # 60%
+        handler.write("Pro[01;35m[Kgress: [m[K100%\n") # 100%
+
+        expected = [(10, None), (50, None), (60, None), (100, None)]
+        self.assertEqual(self._progress_watcher.reports(), expected)
+
+        self.assertEqual(buffer.getvalue(), "Program output!\nMore output!\nEven more\n")
+
+    def test_BasicProgressHandler_color_filtering(self):
+        buffer = io.StringIO()
+        handler = bb.progress.BasicProgressHandler(self.d, outfile=buffer)
+        handler.write("[01;35m[K1[m[K%\n") # 1%
+        handler.write("[01;35m[K2[m[K%\n") # 2%
+        handler.write("[01;35m[K10[m[K%\n") # 10%
+        handler.write("[01;35m[K100[m[K%\n") # 100%
+
+        expected = [(0, None), (1, None), (2, None), (10, None), (100, None)]
+        self.assertListEqual(self._progress_watcher.reports(), expected)
+
+    def test_OutOfProgressHandler_color_filtering(self):
+        buffer = io.StringIO()
+        handler = bb.progress.OutOfProgressHandler(self.d, r'(\d+) of (\d+)', outfile=buffer)
+        handler.write("[01;35m[KText text 1 of[m[K 5") # 1/5
+        handler.write("[01;35m[KText text 3 of[m[K 5") # 3/5
+        handler.write("[01;35m[KText text 5 of[m[K 5") # 5/5
+
+        expected = [(0, None), (20.0, None), (60.0, None), (100.0, None)]
+        self.assertListEqual(self._progress_watcher.reports(), expected)