3693

2 files changed, 10 insertions, 2 deletions

diff --git a/088file.mu b/088file.mu
index fb03e8bf..e91723ab 100644
--- a/088file.mu
+++ b/088file.mu
@@ -90,7 +90,11 @@ def start-writing resources:&:resources, filename:text -> sink:&:sink:char, rout
   }
   # real file system
   file:num <- $open-file-for-writing filename
-  assert file, [no such file]
+  {
+    break-if file
+    msg:text <- append [no such file: ] filename
+    assert file, msg
+  }
   routine-id <- start-running transmit-to-file file, source
 ]
 
diff --git a/html/088file.mu.html b/html/088file.mu.html
index db45a81e..8f044eaa 100644
--- a/html/088file.mu.html
+++ b/html/088file.mu.html
@@ -123,7 +123,11 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
   <span class="Delimiter">}</span>
   <span class="Comment"># real file system</span>
   file:num <span class="Special">&lt;-</span> $open-file-for-writing filename
-  assert file, <span class="Constant">[no such file]</span>
+  <span class="Delimiter">{</span>
+    <span class="muControl">break-if</span> file
+    msg:text <span class="Special">&lt;-</span> append <span class="Constant">[no such file: ]</span> filename
+    assert file, msg
+  <span class="Delimiter">}</span>
   routine-id <span class="Special">&lt;-</span> start-running transmit-to-file file, source
 ]