Différences

Ci-dessous, les différences entre deux révisions de la page.

--- informatique:flutter:debug [09/07/2025 14:03] – créée cyrille
+++ informatique:flutter:debug [09/07/2025 18:28] (Version actuelle) – cyrille
@@ Ligne 1: / Ligne 1: @@
 ====== Flutter / debug ======
-Le rendu ne va pas, il plante sans rien "//dire//" (1) et aucune erreur dans la "debug console".
+  * Dart & Flutter support for Visual Studio Code [[https://dartcode.org/docs/debugging-commands/|Debugging Commands]]
-On observe dans la partie "call stack" (2) le message en rouge "Paused on exception", c'est là qui faut dire au debugger de continuer "Continue (F5)" (4) pour voir apparaître les détails de l'erreur (5).
+===== Attraper un maximum d'erreurs =====
+{{ :informatique:flutter:debug_catch_max_errors.png?nolink&400 |}}
+===== Le rendu plante sans rien dans la debug console =====
+Le rendu ne va pas, il plante sans rien "//dire//" **(1)** et aucune erreur dans la "debug console".
+On observe dans la partie "call stack" **(2)** le message en rouge "Paused on exception", c'est là qui faut dire au debugger de continuer "Continue (F5)" **(3)** pour voir apparaître les détails de l'erreur **(4)**.
 {{:informatique:flutter:debug_rendering_01.png?nolink&300|}}
 {{:informatique:flutter:debug_rendering_02.png?nolink&400|}}
 {{:informatique:flutter:debug_rendering_03.png?nolink&400|}}
+Par exemple un ''ListView'' dans un ''Column'' génère l'erreur, avec souvent une explication.
+<code>
+════════ Exception caught by rendering library ═════════════════════════════════
+The following assertion was thrown during performResize():
+Vertical viewport was given unbounded height.
+Viewports expand in the scrolling direction to fill their container. In this case, a vertical viewport was given an unlimited amount of vertical space in which to expand. This situation typically happens when a scrollable widget is nested inside another scrollable widget.
+If this widget is always nested in a scrollable widget there is no need to use a viewport because there will always be enough vertical space for the children. In this case, consider using a Column or Wrap instead. Otherwise, consider using a CustomScrollView to concatenate arbitrary slivers into a single scrollable.
+The relevant error-causing widget was:
+    ListView ListView:file:///home/.../CroustiWiki.flutter/lib/widgets/duks_list.dart:53:27
+...
+════════ Exception caught by rendering library ═════════════════════════════════
+RenderBox was not laid out: RenderViewport#6f0f6 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
+'package:flutter/src/rendering/box.dart':
+Failed assertion: line 2251 pos 12: 'hasSize'
+The relevant error-causing widget was:
+    ListView ListView:file:///home/.../CroustiWiki.flutter/lib/widgets/duks_list.dart:53:27
+════════════════════════════════════════════════════════════════════════════════
+</code>