diff --git a/.travis.yml b/.travis.yml
index ea5d54eadc1c..0e55d3affc89 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -42,9 +42,12 @@ before_script:
   - cd ..
   - export PATH=$(pwd)/bin${PATH:+:$PATH}
   - echo PATH:${PATH}
+  - set +e   # prevents breaking after_failure
 
 script:
+  - echo "travis_fold:start:nim_c_koch"
   - nim c koch
+  - echo "travis_fold:end:nim_c_koch"
   - ./koch runCI
 
 before_deploy:
@@ -59,3 +62,6 @@ deploy:                         # https://nim-lang.github.io/Nim
   keep-history: false
   on:
     branch: devel
+
+# Extract failed tests
+after_failure: nim c -r tools/ci_testresults.nim
diff --git a/changelog.md b/changelog.md
index eb97ac9a6f95..85e06112bb7b 100644
--- a/changelog.md
+++ b/changelog.md
@@ -38,6 +38,8 @@
 
 - The procs `parseutils.parseBiggsetInt`, `parseutils.parseInt`, `parseutils.parseBiggestUInt` and `parseutils.parseUInt` now raise a `ValueError` when the parsed integer is outside of the valid range. Previously they sometimes raised a `OverflowError` and sometimes returned `0`.
 
+- `streams.StreamObject` now restricts its fields to only raise `system.Defect`, `system.IOError` and `system.OSError`. This change only affects custom stream implementations.
+
 - nre's `RegexMatch.{captureBounds,captures}[]`  no longer return `Option` or
   `nil`/`""`, respectivly. Use the newly added `n in p.captures` method to
   check if a group is captured, otherwise you'll recieve an exception.
diff --git a/config/nimdoc.cfg b/config/nimdoc.cfg
index f89739df6984..f534264a0a6a 100644
--- a/config/nimdoc.cfg
+++ b/config/nimdoc.cfg
@@ -1314,11 +1314,8 @@ dt pre > span.Identifier, dt pre > span.Operator {
   color: #155da4;
   font-weight: 700; }
 
-dt pre > span.Identifier ~ span.Identifier, dt pre > span.Operator ~ span.Identifier {
-  color: inherit;
-  font-weight: inherit; }
-
-dt pre > span.Operator ~ span.Identifier {
+dt pre > span.Keyword ~ span.Identifier, dt pre > span.Identifier ~ span.Identifier,
+dt pre > span.Operator ~ span.Identifier, dt pre > span.Operator ~ span.Identifier {
   color: inherit;
   font-weight: inherit; }
 
diff --git a/koch.nim b/koch.nim
index d21c5240e575..89ee28d5a7c1 100644
--- a/koch.nim
+++ b/koch.nim
@@ -163,7 +163,7 @@ proc bundleNimsuggest() =
   nimCompile("nimsuggest/nimsuggest.nim", options = "-d:release")
 
 proc buildVccTool() =
-  nimCompile("tools/vccexe/vccexe.nim")
+  nimCompileFold("Compile Vcc", "tools/vccexe/vccexe.nim")
 
 proc bundleWinTools() =
   # TODO: consider building under `bin` instead of `.`
@@ -208,10 +208,10 @@ proc buildTool(toolname, args: string) =
 
 proc buildTools() =
   bundleNimsuggest()
-  nimCompile("tools/nimgrep.nim", options = "-d:release")
+  nimCompileFold("Compile nimgrep", "tools/nimgrep.nim", options = "-d:release")
   when defined(windows): buildVccTool()
-  nimCompile("nimpretty/nimpretty.nim", options = "-d:release")
-  nimCompile("tools/nimfind.nim", options = "-d:release")
+  nimCompileFold("Compile nimpretty", "nimpretty/nimpretty.nim", options = "-d:release")
+  nimCompileFold("Compile nimfind", "tools/nimfind.nim", options = "-d:release")
 
 proc nsis(latest: bool; args: string) =
   bundleNimbleExe(latest)
diff --git a/lib/pure/streams.nim b/lib/pure/streams.nim
index 10de86e9f307..b6e77bbc0226 100644
--- a/lib/pure/streams.nim
+++ b/lib/pure/streams.nim
@@ -45,17 +45,22 @@ type
                                  ## here shouldn't be used directly. They are
                                  ## accessible so that a stream implementation
                                  ## can override them.
-    closeImpl*: proc (s: Stream) {.nimcall, tags: [], gcsafe.}
-    atEndImpl*: proc (s: Stream): bool {.nimcall, tags: [], gcsafe.}
-    setPositionImpl*: proc (s: Stream, pos: int) {.nimcall, tags: [], gcsafe.}
-    getPositionImpl*: proc (s: Stream): int {.nimcall, tags: [], gcsafe.}
-    readDataImpl*: proc (s: Stream, buffer: pointer,
-                         bufLen: int): int {.nimcall, tags: [ReadIOEffect], gcsafe.}
-    peekDataImpl*: proc (s: Stream, buffer: pointer,
-                         bufLen: int): int {.nimcall, tags: [ReadIOEffect], gcsafe.}
-    writeDataImpl*: proc (s: Stream, buffer: pointer, bufLen: int) {.nimcall,
-      tags: [WriteIOEffect], gcsafe.}
-    flushImpl*: proc (s: Stream) {.nimcall, tags: [WriteIOEffect], gcsafe.}
+    closeImpl*: proc (s: Stream)
+      {.nimcall, raises: [Defect, IOError, OSError], tags: [], gcsafe.}
+    atEndImpl*: proc (s: Stream): bool
+      {.nimcall, raises: [Defect, IOError, OSError], tags: [], gcsafe.}
+    setPositionImpl*: proc (s: Stream, pos: int)
+      {.nimcall, raises: [Defect, IOError, OSError], tags: [], gcsafe.}
+    getPositionImpl*: proc (s: Stream): int
+      {.nimcall, raises: [Defect, IOError, OSError], tags: [], gcsafe.}
+    readDataImpl*: proc (s: Stream, buffer: pointer, bufLen: int): int
+      {.nimcall, raises: [Defect, IOError, OSError], tags: [ReadIOEffect], gcsafe.}
+    peekDataImpl*: proc (s: Stream, buffer: pointer, bufLen: int): int
+      {.nimcall, raises: [Defect, IOError, OSError], tags: [ReadIOEffect], gcsafe.}
+    writeDataImpl*: proc (s: Stream, buffer: pointer, bufLen: int)
+      {.nimcall, raises: [Defect, IOError, OSError], tags: [WriteIOEffect], gcsafe.}
+    flushImpl*: proc (s: Stream)
+      {.nimcall, raises: [Defect, IOError, OSError], tags: [WriteIOEffect], gcsafe.}
 
 proc flush*(s: Stream) =
   ## flushes the buffers that the stream `s` might use.
@@ -65,10 +70,6 @@ proc close*(s: Stream) =
   ## closes the stream `s`.
   if not isNil(s.closeImpl): s.closeImpl(s)
 
-proc close*(s, unused: Stream) {.deprecated.} =
-  ## closes the stream `s`.
-  s.closeImpl(s)
-
 proc atEnd*(s: Stream): bool =
   ## checks if more data can be read from `f`. Returns true if all data has
   ## been read.
@@ -111,12 +112,6 @@ proc writeData*(s: Stream, buffer: pointer, bufLen: int) =
   ## to the stream `s`.
   s.writeDataImpl(s, buffer, bufLen)
 
-proc writeData*(s, unused: Stream, buffer: pointer,
-                bufLen: int) {.deprecated.} =
-  ## low level proc that writes an untyped `buffer` of `bufLen` size
-  ## to the stream `s`.
-  s.writeDataImpl(s, buffer, bufLen)
-
 proc write*[T](s: Stream, x: T) =
   ## generic write procedure. Writes `x` to the stream `s`. Implementation:
   ##
diff --git a/nimdoc/testproject/expected/subdir/subdir_b/utils.html b/nimdoc/testproject/expected/subdir/subdir_b/utils.html
index f057df7e3659..58108b5f2143 100644
--- a/nimdoc/testproject/expected/subdir/subdir_b/utils.html
+++ b/nimdoc/testproject/expected/subdir/subdir_b/utils.html
@@ -1139,11 +1139,8 @@
   color: #155da4;
   font-weight: 700; }
 
-dt pre > span.Identifier ~ span.Identifier, dt pre > span.Operator ~ span.Identifier {
-  color: inherit;
-  font-weight: inherit; }
-
-dt pre > span.Operator ~ span.Identifier {
+dt pre > span.Keyword ~ span.Identifier, dt pre > span.Identifier ~ span.Identifier,
+dt pre > span.Operator ~ span.Identifier, dt pre > span.Operator ~ span.Identifier {
   color: inherit;
   font-weight: inherit; }
 
diff --git a/nimdoc/testproject/expected/testproject.html b/nimdoc/testproject/expected/testproject.html
index 21a7a0cf836b..63e7bcd6a816 100644
--- a/nimdoc/testproject/expected/testproject.html
+++ b/nimdoc/testproject/expected/testproject.html
@@ -1139,11 +1139,8 @@
   color: #155da4;
   font-weight: 700; }
 
-dt pre > span.Identifier ~ span.Identifier, dt pre > span.Operator ~ span.Identifier {
-  color: inherit;
-  font-weight: inherit; }
-
-dt pre > span.Operator ~ span.Identifier {
+dt pre > span.Keyword ~ span.Identifier, dt pre > span.Identifier ~ span.Identifier,
+dt pre > span.Operator ~ span.Identifier, dt pre > span.Operator ~ span.Identifier {
   color: inherit;
   font-weight: inherit; }
 
diff --git a/nimdoc/testproject/expected/theindex.html b/nimdoc/testproject/expected/theindex.html
index 5a6e575bf5b7..4a8744b96a2d 100644
--- a/nimdoc/testproject/expected/theindex.html
+++ b/nimdoc/testproject/expected/theindex.html
@@ -1139,11 +1139,8 @@
   color: #155da4;
   font-weight: 700; }
 
-dt pre > span.Identifier ~ span.Identifier, dt pre > span.Operator ~ span.Identifier {
-  color: inherit;
-  font-weight: inherit; }
-
-dt pre > span.Operator ~ span.Identifier {
+dt pre > span.Keyword ~ span.Identifier, dt pre > span.Identifier ~ span.Identifier,
+dt pre > span.Operator ~ span.Identifier, dt pre > span.Operator ~ span.Identifier {
   color: inherit;
   font-weight: inherit; }
 
diff --git a/tools/ci_testresults.nim b/tools/ci_testresults.nim
new file mode 100644
index 000000000000..3201606d7fab
--- /dev/null
+++ b/tools/ci_testresults.nim
@@ -0,0 +1,24 @@
+## Print summary of failed tests for CI
+
+import os, json, sets, strformat
+
+const skip = toSet(["reDisabled", "reIgnored", "reSuccess", "reJoined"])
+
+when isMainModule:
+  for fn in walkFiles("testresults/*.json"):
+    let entries = fn.readFile().parseJson()
+    for j in entries:
+      let res = j["result"].getStr()
+      if skip.contains(res):
+        continue
+      echo fmt """
+Category: {j["category"].getStr()}
+Name: {j["name"].getStr()}
+Action: {j["action"].getStr()}
+Result: {res}
+-------- Expected -------
+{j["expected"].getStr()}
+--------- Given  --------
+{j["given"].getStr()}
+-------------------------
+"""
diff --git a/tools/kochdocs.nim b/tools/kochdocs.nim
index 7919deec68b1..c0e7ce66b7fc 100644
--- a/tools/kochdocs.nim
+++ b/tools/kochdocs.nim
@@ -42,10 +42,10 @@ proc execFold*(desc, cmd: string, errorcode: int = QuitFailure, additionalPath =
   ## Execute shell command. Add log folding on Travis CI.
   # https://github.com/travis-ci/travis-ci/issues/2285#issuecomment-42724719
   if existsEnv("TRAVIS"):
-    echo "travis_fold:start:" & desc.replace(" ", "")
+    echo "travis_fold:start:" & desc.replace(" ", "_")
   exec(cmd, errorcode, additionalPath)
   if existsEnv("TRAVIS"):
-    echo "travis_fold:end:" & desc.replace(" ", "")
+    echo "travis_fold:end:" & desc.replace(" ", "_")
 
 proc execCleanPath*(cmd: string,
                    additionalPath = ""; errorcode: int = QuitFailure) =
@@ -69,6 +69,11 @@ proc nimCompile*(input: string, outputDir = "bin", mode = "c", options = "") =
   let cmd = findNim() & " " & mode & " -o:" & output & " " & options & " " & input
   exec cmd
 
+proc nimCompileFold*(desc, input: string, outputDir = "bin", mode = "c", options = "") =
+  let output = outputDir / input.splitFile.name.exe
+  let cmd = findNim() & " " & mode & " -o:" & output & " " & options & " " & input
+  execFold(desc, cmd)
+
 const
   pdf = """
 doc/manual.rst