UsdExpiredPrimAccessError in UsdImagingStageSceneIndex::_ApplyPendingResyncs

Open lanierd-adsk opened this issue 2 years ago • 4 comments

Description of Issue

In USD 23.02 There are 2 issues :

In UsdImagingStageSceneIndex::_ApplyPendingResyncs, when doing : UsdPrim prim = _stage->GetPrimAtPath(_usdPrimsToResync[i]); We don't check if the prim is valid/expired
It throws later a UsdExpiredPrimAccessError.

Steps to Reproduce

I am providing a cpp file to repro (it was under Windows 10 with some Microsoft Visual Studio specific features but is easily portable)

I load a stage (the file will be shared later)
I create a UsdImagingStageSceneIndex which is monitoring this stage
I create a scope primitive in the stage
I rename that scope prim
I call UsdImagingStageSceneIndex::ApplyPendingUpdates() and it throws an UsdExpiredPrimAccessError

System Information (OS, Hardware)

Windows 10.

Package Versions

Build Flags

Jun 26 '23 09:06 lanierd-adsk

The stage file to use to repro :

#usda 1.0 ( doc = """Generated from Composed Stage of root layer c:\Users\lanierd\Documents\maya\projects\default\scenes\stageShape1-layer1.usd """ )

def Mesh "pSphere1" ( kind = "component" ) { uniform bool doubleSided = 1 float3[] extent = [(-1.0000002, -1, -1.0000005), (1, 1, 1.0000001)] int[] faceVertexCounts = [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3] int[] faceVertexIndices = [0, 1, 21, 20, 1, 2, 22, 21, 2, 3, 23, 22, 3, 4, 24, 23, 4, 5, 25, 24, 5, 6, 26, 25, 6, 7, 27, 26, 7, 8, 28, 27, 8, 9, 29, 28, 9, 10, 30, 29, 10, 11, 31, 30, 11, 12, 32, 31, 12, 13, 33, 32, 13, 14, 34, 33, 14, 15, 35, 34, 15, 16, 36, 35, 16, 17, 37, 36, 17, 18, 38, 37, 18, 19, 39, 38, 19, 0, 20, 39, 20, 21, 41, 40, 21, 22, 42, 41, 22, 23, 43, 42, 23, 24, 44, 43, 24, 25, 45, 44, 25, 26, 46, 45, 26, 27, 47, 46, 27, 28, 48, 47, 28, 29, 49, 48, 29, 30, 50, 49, 30, 31, 51, 50, 31, 32, 52, 51, 32, 33, 53, 52, 33, 34, 54, 53, 34, 35, 55, 54, 35, 36, 56, 55, 36, 37, 57, 56, 37, 38, 58, 57, 38, 39, 59, 58, 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0.6500001), (0.05, 0.6500001), (0.1, 0.6500001), (0.15, 0.6500001), (0.2, 0.6500001), (0.25, 0.6500001), (0.3, 0.6500001), (0.35000002, 0.6500001), (0.40000004, 0.6500001), (0.45000005, 0.6500001), (0.50000006, 0.6500001), (0.5500001, 0.6500001), (0.6000001, 0.6500001), (0.6500001, 0.6500001), (0.7000001, 0.6500001), (0.7500001, 0.6500001), (0.80000013, 0.6500001), (0.85000014, 0.6500001), (0.90000015, 0.6500001), (0.95000017, 0.6500001), (1.0000001, 0.6500001), (0, 0.7000001), (0.05, 0.7000001), (0.1, 0.7000001), (0.15, 0.7000001), (0.2, 0.7000001), (0.25, 0.7000001), (0.3, 0.7000001), (0.35000002, 0.7000001), (0.40000004, 0.7000001), (0.45000005, 0.7000001), (0.50000006, 0.7000001), (0.5500001, 0.7000001), (0.6000001, 0.7000001), (0.6500001, 0.7000001), (0.7000001, 0.7000001), (0.7500001, 0.7000001), (0.80000013, 0.7000001), (0.85000014, 0.7000001), (0.90000015, 0.7000001), (0.95000017, 0.7000001), (1.0000001, 0.7000001), (0, 0.7500001), (0.05, 0.7500001), (0.1, 0.7500001), (0.15, 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(0.25, 0.85000014), (0.3, 0.85000014), (0.35000002, 0.85000014), (0.40000004, 0.85000014), (0.45000005, 0.85000014), (0.50000006, 0.85000014), (0.5500001, 0.85000014), (0.6000001, 0.85000014), (0.6500001, 0.85000014), (0.7000001, 0.85000014), (0.7500001, 0.85000014), (0.80000013, 0.85000014), (0.85000014, 0.85000014), (0.90000015, 0.85000014), (0.95000017, 0.85000014), (1.0000001, 0.85000014), (0, 0.90000015), (0.05, 0.90000015), (0.1, 0.90000015), (0.15, 0.90000015), (0.2, 0.90000015), (0.25, 0.90000015), (0.3, 0.90000015), (0.35000002, 0.90000015), (0.40000004, 0.90000015), (0.45000005, 0.90000015), (0.50000006, 0.90000015), (0.5500001, 0.90000015), (0.6000001, 0.90000015), (0.6500001, 0.90000015), (0.7000001, 0.90000015), (0.7500001, 0.90000015), (0.80000013, 0.90000015), (0.85000014, 0.90000015), (0.90000015, 0.90000015), (0.95000017, 0.90000015), (1.0000001, 0.90000015), (0, 0.95000017), (0.05, 0.95000017), (0.1, 0.95000017), (0.15, 0.95000017), (0.2, 0.95000017), (0.25, 0.95000017), (0.3, 0.95000017), (0.35000002, 0.95000017), (0.40000004, 0.95000017), (0.45000005, 0.95000017), (0.50000006, 0.95000017), (0.5500001, 0.95000017), (0.6000001, 0.95000017), (0.6500001, 0.95000017), (0.7000001, 0.95000017), (0.7500001, 0.95000017), (0.80000013, 0.95000017), (0.85000014, 0.95000017), (0.90000015, 0.95000017), (0.95000017, 0.95000017), (1.0000001, 0.95000017), (0.025, 0), (0.075, 0), (0.125, 0), (0.17500001, 0), (0.22500001, 0), (0.275, 0), (0.32500002, 0), (0.375, 0), (0.425, 0), (0.47500002, 0), (0.525, 0), (0.575, 0), (0.625, 0), (0.675, 0), (0.72499996, 0), (0.775, 0), (0.825, 0), (0.875, 0), (0.925, 0), (0.97499996, 0), (0.025, 1), (0.075, 1), (0.125, 1), (0.17500001, 1), (0.22500001, 1), (0.275, 1), (0.32500002, 1), (0.375, 1), (0.425, 1), (0.47500002, 1), (0.525, 1), (0.575, 1), (0.625, 1), (0.675, 1), (0.72499996, 1), (0.775, 1), (0.825, 1), (0.875, 1), (0.925, 1), (0.97499996, 1)] ( customData = { dictionary Maya = { token name = "map1" } } interpolation = "faceVarying" ) int[] primvars:st:indices = [0, 1, 22, 21, 1, 2, 23, 22, 2, 3, 24, 23, 3, 4, 25, 24, 4, 5, 26, 25, 5, 6, 27, 26, 6, 7, 28, 27, 7, 8, 29, 28, 8, 9, 30, 29, 9, 10, 31, 30, 10, 11, 32, 31, 11, 12, 33, 32, 12, 13, 34, 33, 13, 14, 35, 34, 14, 15, 36, 35, 15, 16, 37, 36, 16, 17, 38, 37, 17, 18, 39, 38, 18, 19, 40, 39, 19, 20, 41, 40, 21, 22, 43, 42, 22, 23, 44, 43, 23, 24, 45, 44, 24, 25, 46, 45, 25, 26, 47, 46, 26, 27, 48, 47, 27, 28, 49, 48, 28, 29, 50, 49, 29, 30, 51, 50, 30, 31, 52, 51, 31, 32, 53, 52, 32, 33, 54, 53, 33, 34, 55, 54, 34, 35, 56, 55, 35, 36, 57, 56, 36, 37, 58, 57, 37, 38, 59, 58, 38, 39, 60, 59, 39, 40, 61, 60, 40, 41, 62, 61, 42, 43, 64, 63, 43, 44, 65, 64, 44, 45, 66, 65, 45, 46, 67, 66, 46, 47, 68, 67, 47, 48, 69, 68, 48, 49, 70, 69, 49, 50, 71, 70, 50, 51, 72, 71, 51, 52, 73, 72, 52, 53, 74, 73, 53, 54, 75, 74, 54, 55, 76, 75, 55, 56, 77, 76, 56, 57, 78, 77, 57, 58, 79, 78, 58, 59, 80, 79, 59, 60, 81, 80, 60, 61, 82, 81, 61, 62, 83, 82, 63, 64, 85, 84, 64, 65, 86, 85, 65, 66, 87, 86, 66, 67, 88, 87, 67, 68, 89, 88, 68, 69, 90, 89, 69, 70, 91, 90, 70, 71, 92, 91, 71, 72, 93, 92, 72, 73, 94, 93, 73, 74, 95, 94, 74, 75, 96, 95, 75, 76, 97, 96, 76, 77, 98, 97, 77, 78, 99, 98, 78, 79, 100, 99, 79, 80, 101, 100, 80, 81, 102, 101, 81, 82, 103, 102, 82, 83, 104, 103, 84, 85, 106, 105, 85, 86, 107, 106, 86, 87, 108, 107, 87, 88, 109, 108, 88, 89, 110, 109, 89, 90, 111, 110, 90, 91, 112, 111, 91, 92, 113, 112, 92, 93, 114, 113, 93, 94, 115, 114, 94, 95, 116, 115, 95, 96, 117, 116, 96, 97, 118, 117, 97, 98, 119, 118, 98, 99, 120, 119, 99, 100, 121, 120, 100, 101, 122, 121, 101, 102, 123, 122, 102, 103, 124, 123, 103, 104, 125, 124, 105, 106, 127, 126, 106, 107, 128, 127, 107, 108, 129, 128, 108, 109, 130, 129, 109, 110, 131, 130, 110, 111, 132, 131, 111, 112, 133, 132, 112, 113, 134, 133, 113, 114, 135, 134, 114, 115, 136, 135, 115, 116, 137, 136, 116, 117, 138, 137, 117, 118, 139, 138, 118, 119, 140, 139, 119, 120, 141, 140, 120, 121, 142, 141, 121, 122, 143, 142, 122, 123, 144, 143, 123, 124, 145, 144, 124, 125, 146, 145, 126, 127, 148, 147, 127, 128, 149, 148, 128, 129, 150, 149, 129, 130, 151, 150, 130, 131, 152, 151, 131, 132, 153, 152, 132, 133, 154, 153, 133, 134, 155, 154, 134, 135, 156, 155, 135, 136, 157, 156, 136, 137, 158, 157, 137, 138, 159, 158, 138, 139, 160, 159, 139, 140, 161, 160, 140, 141, 162, 161, 141, 142, 163, 162, 142, 143, 164, 163, 143, 144, 165, 164, 144, 145, 166, 165, 145, 146, 167, 166, 147, 148, 169, 168, 148, 149, 170, 169, 149, 150, 171, 170, 150, 151, 172, 171, 151, 152, 173, 172, 152, 153, 174, 173, 153, 154, 175, 174, 154, 155, 176, 175, 155, 156, 177, 176, 156, 157, 178, 177, 157, 158, 179, 178, 158, 159, 180, 179, 159, 160, 181, 180, 160, 161, 182, 181, 161, 162, 183, 182, 162, 163, 184, 183, 163, 164, 185, 184, 164, 165, 186, 185, 165, 166, 187, 186, 166, 167, 188, 187, 168, 169, 190, 189, 169, 170, 191, 190, 170, 171, 192, 191, 171, 172, 193, 192, 172, 173, 194, 193, 173, 174, 195, 194, 174, 175, 196, 195, 175, 176, 197, 196, 176, 177, 198, 197, 177, 178, 199, 198, 178, 179, 200, 199, 179, 180, 201, 200, 180, 181, 202, 201, 181, 182, 203, 202, 182, 183, 204, 203, 183, 184, 205, 204, 184, 185, 206, 205, 185, 186, 207, 206, 186, 187, 208, 207, 187, 188, 209, 208, 189, 190, 211, 210, 190, 191, 212, 211, 191, 192, 213, 212, 192, 193, 214, 213, 193, 194, 215, 214, 194, 195, 216, 215, 195, 196, 217, 216, 196, 197, 218, 217, 197, 198, 219, 218, 198, 199, 220, 219, 199, 200, 221, 220, 200, 201, 222, 221, 201, 202, 223, 222, 202, 203, 224, 223, 203, 204, 225, 224, 204, 205, 226, 225, 205, 206, 227, 226, 206, 207, 228, 227, 207, 208, 229, 228, 208, 209, 230, 229, 210, 211, 232, 231, 211, 212, 233, 232, 212, 213, 234, 233, 213, 214, 235, 234, 214, 215, 236, 235, 215, 216, 237, 236, 216, 217, 238, 237, 217, 218, 239, 238, 218, 219, 240, 239, 219, 220, 241, 240, 220, 221, 242, 241, 221, 222, 243, 242, 222, 223, 244, 243, 223, 224, 245, 244, 224, 225, 246, 245, 225, 226, 247, 246, 226, 227, 248, 247, 227, 228, 249, 248, 228, 229, 250, 249, 229, 230, 251, 250, 231, 232, 253, 252, 232, 233, 254, 253, 233, 234, 255, 254, 234, 235, 256, 255, 235, 236, 257, 256, 236, 237, 258, 257, 237, 238, 259, 258, 238, 239, 260, 259, 239, 240, 261, 260, 240, 241, 262, 261, 241, 242, 263, 262, 242, 243, 264, 263, 243, 244, 265, 264, 244, 245, 266, 265, 245, 246, 267, 266, 246, 247, 268, 267, 247, 248, 269, 268, 248, 249, 270, 269, 249, 250, 271, 270, 250, 251, 272, 271, 252, 253, 274, 273, 253, 254, 275, 274, 254, 255, 276, 275, 255, 256, 277, 276, 256, 257, 278, 277, 257, 258, 279, 278, 258, 259, 280, 279, 259, 260, 281, 280, 260, 261, 282, 281, 261, 262, 283, 282, 262, 263, 284, 283, 263, 264, 285, 284, 264, 265, 286, 285, 265, 266, 287, 286, 266, 267, 288, 287, 267, 268, 289, 288, 268, 269, 290, 289, 269, 270, 291, 290, 270, 271, 292, 291, 271, 272, 293, 292, 273, 274, 295, 294, 274, 275, 296, 295, 275, 276, 297, 296, 276, 277, 298, 297, 277, 278, 299, 298, 278, 279, 300, 299, 279, 280, 301, 300, 280, 281, 302, 301, 281, 282, 303, 302, 282, 283, 304, 303, 283, 284, 305, 304, 284, 285, 306, 305, 285, 286, 307, 306, 286, 287, 308, 307, 287, 288, 309, 308, 288, 289, 310, 309, 289, 290, 311, 310, 290, 291, 312, 311, 291, 292, 313, 312, 292, 293, 314, 313, 294, 295, 316, 315, 295, 296, 317, 316, 296, 297, 318, 317, 297, 298, 319, 318, 298, 299, 320, 319, 299, 300, 321, 320, 300, 301, 322, 321, 301, 302, 323, 322, 302, 303, 324, 323, 303, 304, 325, 324, 304, 305, 326, 325, 305, 306, 327, 326, 306, 307, 328, 327, 307, 308, 329, 328, 308, 309, 330, 329, 309, 310, 331, 330, 310, 311, 332, 331, 311, 312, 333, 332, 312, 313, 334, 333, 313, 314, 335, 334, 315, 316, 337, 336, 316, 317, 338, 337, 317, 318, 339, 338, 318, 319, 340, 339, 319, 320, 341, 340, 320, 321, 342, 341, 321, 322, 343, 342, 322, 323, 344, 343, 323, 324, 345, 344, 324, 325, 346, 345, 325, 326, 347, 346, 326, 327, 348, 347, 327, 328, 349, 348, 328, 329, 350, 349, 329, 330, 351, 350, 330, 331, 352, 351, 331, 332, 353, 352, 332, 333, 354, 353, 333, 334, 355, 354, 334, 335, 356, 355, 336, 337, 358, 357, 337, 338, 359, 358, 338, 339, 360, 359, 339, 340, 361, 360, 340, 341, 362, 361, 341, 342, 363, 362, 342, 343, 364, 363, 343, 344, 365, 364, 344, 345, 366, 365, 345, 346, 367, 366, 346, 347, 368, 367, 347, 348, 369, 368, 348, 349, 370, 369, 349, 350, 371, 370, 350, 351, 372, 371, 351, 352, 373, 372, 352, 353, 374, 373, 353, 354, 375, 374, 354, 355, 376, 375, 355, 356, 377, 376, 357, 358, 379, 378, 358, 359, 380, 379, 359, 360, 381, 380, 360, 361, 382, 381, 361, 362, 383, 382, 362, 363, 384, 383, 363, 364, 385, 384, 364, 365, 386, 385, 365, 366, 387, 386, 366, 367, 388, 387, 367, 368, 389, 388, 368, 369, 390, 389, 369, 370, 391, 390, 370, 371, 392, 391, 371, 372, 393, 392, 372, 373, 394, 393, 373, 374, 395, 394, 374, 375, 396, 395, 375, 376, 397, 396, 376, 377, 398, 397, 1, 0, 399, 2, 1, 400, 3, 2, 401, 4, 3, 402, 5, 4, 403, 6, 5, 404, 7, 6, 405, 8, 7, 406, 9, 8, 407, 10, 9, 408, 11, 10, 409, 12, 11, 410, 13, 12, 411, 14, 13, 412, 15, 14, 413, 16, 15, 414, 17, 16, 415, 18, 17, 416, 19, 18, 417, 20, 19, 418, 378, 379, 419, 379, 380, 420, 380, 381, 421, 381, 382, 422, 382, 383, 423, 383, 384, 424, 384, 385, 425, 385, 386, 426, 386, 387, 427, 387, 388, 428, 388, 389, 429, 389, 390, 430, 390, 391, 431, 391, 392, 432, 392, 393, 433, 393, 394, 434, 394, 395, 435, 395, 396, 436, 396, 397, 437, 397, 398, 438] }

Jun 26 '23 09:06 lanierd-adsk

The cpp file to use to repro : // USDExample.cpp : This file contains the 'main' function. Program execution begins and ends there. //

//Include #define NOMINMAX //Don't use min and max macros from Windows.h #include //Usage of std::cout (optional) #pragma warning (push) #pragma warning (disable : 4244 4305) //Disable a few warnings

#define TBB_USE_ASSERT 0 //Defines I needed for TBB to compile #define TBB_USE_THREADING_TOOLS 0 #define TBB_USE_PERFORMANCE_WARNINGS 0 #define __TBB_STATISTICS 0

//USD/Hydra headers #include <pxr/base/tf/diagnostic.h> #include <pxr/usd/usd/usdfileFormat.h> #include <pxr/usd/usd/prim.h> #include <pxr/usd/usd/stage.h> #include <pxr/usdImaging/usdImaging/stageSceneIndex.h> #pragma warning (pop) //Enable all warnings

//Link to these USD libraries (is Microsoft Visual Studio specific) #pragma comment(lib, "usd_sdf.lib") #pragma comment(lib, "usd_tf.lib") #pragma comment(lib, "usd_usd.lib") #pragma comment(lib, "usd_arch.lib") #pragma comment(lib, "usd_usdimaging.lib")

PXR_NAMESPACE_USING_DIRECTIVE

namespace { //Functions copy/pasted from maya-usd plugin to mimic what maya-usd does for a rename of a prim in a stage void duplicateLoadRules( UsdStage& stage, const SdfPath& fromPath, const SdfPath& destPath) { // Note: get a copy of the rules since we are going to insert new rules as we iterate. auto loadRules = stage.GetLoadRules();

    // Retrieve the effective rule for the source path.
    //
    // The reason we retrieve the effective rule is that even
    // though we will modify all rules specific to that path,
    // its actual effective rule might be dictated by an ancestor.
    //
    // For example, there might be *no* rules at all for the path
    // while its parent has a rule to unload it. So its effective
    // rule would be "unloaded".
    //
    // In that case, we will have to reproduce that rule at the
    // destination as a path-specific rule.
    const auto desiredRule = loadRules.GetEffectiveRuleForPath(fromPath);

    // Analyze the reasons the source path was loaded or unloaded and
    // replicate them to the destination.
    //
    // The case we need to explicitly handle is when the path is controlled
    // by a rule on itself or a descendent and not from an ancestor. Then we
    // need to duplicate the load or unload rule.
    //
    // We do this by iterating over all rules and duplicating all rules that
    // contain the source path to create rules with the destination path.

    auto oldRules = loadRules.GetRules();
    for (const auto& rule : oldRules) {
        const SdfPath& rulePath = rule.first;
        if (rulePath.HasPrefix(fromPath)) {
            const auto newPath = rulePath.ReplacePrefix(fromPath, destPath);
            loadRules.AddRule(newPath, rule.second);
        }
    }

    // Verify if the effective rule at the destination was covered by the
    // modified rules above. If not, add a specific rule that will give us
    // the desired behaviour.
    //
    // The reason we don't simply add this specific rule for all cases and
    // avoid the above work is that sub-paths might have rules and we need
    // to preserve those rules. So we would need to do the above work anyway.
    //
    // Given that, a common case is that we don't need to add an additional
    // rule. Always adding it would add unnecessary rules.
    //
    // Note: the UsdStageLoadRules has a Minimize function that simplifies
    // rules, but we don't want to change rules the user might have set.
    // The user may expect those rules to exist for some future purpose
    // even though they are not currently used. As a general principle
    // we try to not change user data unless necessary.
    if (desiredRule != loadRules.GetEffectiveRuleForPath(destPath)) {
        loadRules.AddRule(destPath, desiredRule);
    }

    // Update the rules in the load rules object and then in the stage
    // since we were operating on a copy.
    stage.SetLoadRules(loadRules);
}

}//end of global namespace

void removeRulesForPath(UsdStage& stage, const SdfPath& path) { // Note: get a copy of the rules since we are going to remove rules. auto loadRules = stage.GetLoadRules(); auto rules = loadRules.GetRules();

// Remove all rules that match the given path.
auto newEnd = std::remove_if(rules.begin(), rules.end(), [&path](const auto& rule) {
    const SdfPath& rulePath = rule.first;
    return rulePath.HasPrefix(path);
});
rules.erase(newEnd, rules.end());

// Update the rules in the load rules object and then in the stage
// since we were operating on a copy.
loadRules.SetRules(rules);
stage.SetLoadRules(loadRules);

}

//USD File to load const std::string stagePath ("D:/usdstage.usda"); int main() { std::cout << "Usd Example !\n";

//1. Load the usd file
UsdStageRefPtr pStage = UsdStage::Open(stagePath);
if( ! pStage){
    std::cout << "Error the usd file doesn't exist!\n";
    return 1;
}

//Exporting the stage as .usda for debugging purpose
SdfLayer::FileFormatArguments fileFormatArgs;
fileFormatArgs[UsdUsdFileFormatTokens->FormatArg] = "usda";
pStage->Export("d:/usdstageBeforeAnything.txt", true, fileFormatArgs);//Write .usda file from current stage to disk

//2. Create a UsdImagingStagesceneIndex that monitors the stage
UsdImagingStageSceneIndexRefPtr pImagingStageSI = UsdImagingStageSceneIndex::New();
pImagingStageSI->SetStage(pStage);

//3. Create a new scope prim named "Scope1"
const SdfPath oldPath("/Scope1");
const TfToken primToken("Scope");
UsdPrim primWithOldName = pStage->DefinePrim(oldPath, primToken);
if (! primWithOldName.IsValid()){
    TF_RUNTIME_ERROR("Failed to create new prim type: %s", primToken.GetText());
}
pImagingStageSI->ApplyPendingUpdates();//Apply pending updates in the scene index with the recent changes from the stage
pStage->Export("d:/usdstageAfterScopeCreation.txt", true, fileFormatArgs);//Write .usda file from current stage to disk

//4. Rename the Scope prim from "Scope1" to "mat"
{
    SdfChangeBlock changeBlock;

    const SdfPath newPath("/mat");

    // Make sure the load state of the renamed prim will be preserved.
    // We copy all rules that applied to it specifically and remove the rules
    // that applied to it specifically.
    auto fromPath = oldPath;
    auto destPath = newPath;
    duplicateLoadRules(*pStage, fromPath, destPath);
    removeRulesForPath(*pStage, fromPath);

    const SdfLayerHandleVector layersStack = pStage->GetLayerStack();
    SdfPrimSpecHandleVector primSpecs;
    for (const SdfLayerHandle& layer : layersStack) {
        const SdfPrimSpecHandle primSpec = layer->GetPrimAtPath(primWithOldName.GetPath());
        if (primSpec){
            primSpecs.push_back(primSpec);
        }
    }

    const std::string newName("mat");
    for (auto primSpec : primSpecs) {
        primSpec->SetName(newName);
    }
}//end of rename block and SdfChangeBlock will apply the changes

pImagingStageSI->ApplyPendingUpdates();//Apply pending updates in the scene index with the recent changes from the stage ---> CRASHES with 
pStage->Export("d:/usdstageAfterRename.txt", true, fileFormatArgs);//Write .usda file from current stage to disk

}

Jun 26 '23 09:06 lanierd-adsk

Filed as internal issue #USD-8438

Jun 26 '23 16:06 jesschimein

I can't reproduce this in current USD. When refactoring the UsdImaging_AdapterManager in May 2023, I added a check that the prim is valid ["if (!prim) { return ...; }"] to UsdImaging_AdapterManager::LookupAdapters. I think that this actually fixes the issue you are seeing.

@lanierd-adsk Can you confirm that the issue you are seeing doesn't repro in more recent USD versions?

Mar 11 '24 18:03 unhyperbolic