{"record":{"id":"c83b9be17597612b","repo":"d2lang/d2","slug":"failed-to-decompress-sourcesanspro-italic-v","errorCode":null,"errorMessage":"Failed to decompress SourceSansPro-Italic: %v","messagePattern":"Failed to decompress SourceSansPro-Italic: (.+?)","errorType":"panic","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"d2renderers/d2fonts/d2fonts_embed_wasm.go","lineNumber":73,"sourceCode":"\t\tpanic(fmt.Sprintf(\"Failed to decompress SourceSansPro-Regular: %v\", err))\n\t} else {\n\t\tFontEncodings.Set(Font{Family: SourceSansPro, Style: FONT_STYLE_REGULAR}, str)\n\t}\n\n\tif str, err := compression.DecompressBrotli(sourceSansProBoldBr); err != nil {\n\t\tpanic(fmt.Sprintf(\"Failed to decompress SourceSansPro-Bold: %v\", err))\n\t} else {\n\t\tFontEncodings.Set(Font{Family: SourceSansPro, Style: FONT_STYLE_BOLD}, str)\n\t}\n\n\tif str, err := compression.DecompressBrotli(sourceSansProSemiboldBr); err != nil {\n\t\tpanic(fmt.Sprintf(\"Failed to decompress SourceSansPro-Semibold: %v\", err))\n\t} else {\n\t\tFontEncodings.Set(Font{Family: SourceSansPro, Style: FONT_STYLE_SEMIBOLD}, str)\n\t}\n\n\tif str, err := compression.DecompressBrotli(sourceSansProItalicBr); err != nil {\n\t\tpanic(fmt.Sprintf(\"Failed to decompress SourceSansPro-Italic: %v\", err))\n\t} else {\n\t\tFontEncodings.Set(Font{Family: SourceSansPro, Style: FONT_STYLE_ITALIC}, str)\n\t}\n\n\t// Decompress and register SourceCodePro fonts\n\tif str, err := compression.DecompressBrotli(sourceCodeProRegularBr); err != nil {\n\t\tpanic(fmt.Sprintf(\"Failed to decompress SourceCodePro-Regular: %v\", err))\n\t} else {\n\t\tFontEncodings.Set(Font{Family: SourceCodePro, Style: FONT_STYLE_REGULAR}, str)\n\t}\n\n\tif str, err := compression.DecompressBrotli(sourceCodeProBoldBr); err != nil {\n\t\tpanic(fmt.Sprintf(\"Failed to decompress SourceCodePro-Bold: %v\", err))\n\t} else {\n\t\tFontEncodings.Set(Font{Family: SourceCodePro, Style: FONT_STYLE_BOLD}, str)\n\t}\n\n\tif str, err := compression.DecompressBrotli(sourceCodeProSemiboldBr); err != nil {","sourceCodeStart":55,"sourceCodeEnd":91,"githubUrl":"https://github.com/d2lang/d2/blob/0d69dca6f532ceaeacd615d35d1eaa41a238ffdb/d2renderers/d2fonts/d2fonts_embed_wasm.go#L55-L91","documentation":"init()-time panic in the wasm d2fonts package when the embedded brotli-compressed SourceSansPro Italic font fails to decompress. Registration into FontEncodings never happens and the whole module fails to initialize.","triggerScenarios":"Package init of the wasm build when compression.DecompressBrotli(sourceSansProItalicBr) errors — corrupt or invalid embedded brotli bytes.","commonSituations":"Broken build artifacts; incomplete embed (go:embed missing file replaced by placeholder); incompatible brotli compression settings when regenerating assets.","solutions":["Test sourceSansProItalicBr with a standalone brotli decompressor","Regenerate the italic .br asset from the original TTF","Rebuild the wasm artifact from a clean checkout","Compare embedded bytes against upstream d2 to spot corruption"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":"if _, err := compression.DecompressBrotli(sourceSansProItalicBr); err != nil {\n    return fmt.Errorf(\"broken embedded SourceSansPro-Italic asset: %w\", err)\n}","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Regenerate all font .br assets together","Validate assets in CI before publishing","Keep brotli toolchain versions consistent","Rebuild from clean checkouts"],"tags":["wasm","fonts","brotli","init-panic"],"backgroundTag":"brotli-decompression-failed","analyzedSha":"0d69dca6f532ceaeacd615d35d1eaa41a238ffdb","analyzedAt":"2026-08-31T12:19:21.182Z","schemaVersion":2},"datasetVersion":"2026-09-01T08:17:40.651Z"}