Correct the fallback handling when an icon cannot be loaded. #5649

Job	Run time
Pre-commit checks / Pre-commit Checks	39s
Check towncrier / Towncrier Checks	32s
Python package (android) / Create Python Package	51s
Python package (core) / Create Python Package	43s
Python package (cocoa) / Create Python Package	51s
Python package (demo) / Create Python Package	54s
Python package (dummy) / Create Python Package	43s
Python package (gtk) / Create Python Package	42s
Python package (iOS) / Create Python Package	48s
Python package (textual) / Create Python Package	42s
Python package (toga) / Create Python Package	43s
Python package (web) / Create Python Package	44s
Python package (winforms) / Create Python Package	43s
Test core (macos-12, 3.8)	2m 5s
Test core (macos-12, 3.12)	1m 56s
Test core (macos-12, 3.13-dev)	6m 6s
Test core (macos-14, 3.12)	53s
Test core (macos-14, 3.13-dev)	1m 32s
Test core (ubuntu-latest, 3.8)	51s
Test core (ubuntu-latest, 3.12)	1m 8s
Test core (ubuntu-latest, 3.13-dev)	1m 56s
Test core (windows-latest, 3.8)	1m 41s
Test core (windows-latest, 3.12)	1m 51s
Test core (ubuntu-latest, 3.9, false)	57s
Test core (ubuntu-latest, 3.10, false)	53s
Test core (ubuntu-latest, 3.11, false)	50s
Coverage	35s
Testbed (macOS-x86_64)	4m 40s
Testbed (macOS-arm64)	2m 59s
Testbed (windows)	4m 16s
Testbed (linux)	2m 44s
Testbed (android)	7m 39s
Testbed (iOS)	6m 23s
	1h 1m 30s

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