2025-09-16T04:34:28,483 Created temporary directory: /tmp/pip-build-tracker-j1zyhf2s
2025-09-16T04:34:28,484 Initialized build tracking at /tmp/pip-build-tracker-j1zyhf2s
2025-09-16T04:34:28,484 Created build tracker: /tmp/pip-build-tracker-j1zyhf2s
2025-09-16T04:34:28,484 Entered build tracker: /tmp/pip-build-tracker-j1zyhf2s
2025-09-16T04:34:28,485 Created temporary directory: /tmp/pip-wheel-e920d4nf
2025-09-16T04:34:28,488 Created temporary directory: /tmp/pip-ephem-wheel-cache-jg4x78wo
2025-09-16T04:34:28,548 Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
2025-09-16T04:34:28,550 2 location(s) to search for versions of returnn:
2025-09-16T04:34:28,550 * https://pypi.org/simple/returnn/
2025-09-16T04:34:28,550 * https://www.piwheels.org/simple/returnn/
2025-09-16T04:34:28,551 Fetching project page and analyzing links: https://pypi.org/simple/returnn/
2025-09-16T04:34:28,551 Getting page https://pypi.org/simple/returnn/
2025-09-16T04:34:28,553 Found index url https://pypi.org/simple/
2025-09-16T04:34:28,739 Fetched page https://pypi.org/simple/returnn/ as application/vnd.pypi.simple.v1+json
2025-09-16T04:34:28,943   Skipping link: No binaries permitted for returnn: https://files.pythonhosted.org/packages/6e/89/655602190ae5f7a357f384ad51855b1f69763aee991113b9bf7227abf23d/returnn-1.0.0-py3-none-any.whl (from https://pypi.org/simple/returnn/)
2025-09-16T04:34:28,943   Found link https://files.pythonhosted.org/packages/23/d2/70be82368f4b3f54138056aec1a1572318d5020343804c4a8eadf9162812/returnn-1.0.0.tar.gz (from https://pypi.org/simple/returnn/), version: 1.0.0
2025-09-16T04:34:28,944   Found link https://files.pythonhosted.org/packages/0a/23/db1f532401c3ca6fac17ce12131350262246532e00b16d6546d6620ec50d/returnn-1.20190513.131010.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190513.131010
2025-09-16T04:34:28,944   Found link https://files.pythonhosted.org/packages/f0/bb/4cacde916b83c34b68fb6e00ed2aa934ba89edad782e31388cfed83e31e4/returnn-1.20190513.132033.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190513.132033
2025-09-16T04:34:28,944   Found link https://files.pythonhosted.org/packages/da/2b/930ce5ef3f0f6a44ee03889d3411a46ad90effc72a690c42e76d4a668ff0/returnn-1.20190513.134608.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190513.134608
2025-09-16T04:34:28,945   Found link https://files.pythonhosted.org/packages/bf/34/911d3a334a136cd4ff25fcf679286b96c3e853414f9ac4003166722678a6/returnn-1.20190513.221304.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190513.221304
2025-09-16T04:34:28,945   Found link https://files.pythonhosted.org/packages/aa/2b/e937182d49c352fd5f3213136e27573bb66d4b880892fc633f373e77edfc/returnn-1.20190515.205601.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190515.205601
2025-09-16T04:34:28,945   Found link https://files.pythonhosted.org/packages/43/68/c714d30af8585a65e27a88257707e1024b8f3caa8b92bc2eb25c583efd30/returnn-1.20190515.211127.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190515.211127
2025-09-16T04:34:28,945   Found link https://files.pythonhosted.org/packages/41/d2/eaa09c49c55bd1666655056dd75357a720bd5066e6160eda7252299f1feb/returnn-1.20190516.180009.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190516.180009
2025-09-16T04:34:28,946   Found link https://files.pythonhosted.org/packages/95/0a/fe3ef254c10b102f57530b0747470b5564a153711e5a9d4dc13b1eabcb29/returnn-1.20190927.121701.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20190927.121701
2025-09-16T04:34:28,946   Found link https://files.pythonhosted.org/packages/72/d1/e02f2842e31b65a3234b12be7ac776b8952ccac7ba369c6a419c3f81a1d1/returnn-1.20200112.152700.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200112.152700
2025-09-16T04:34:28,946   Found link https://files.pythonhosted.org/packages/0f/ca/8379fc305c797c346905ec70b1a9515bc17e5b969b4084cc64255a72bf2c/returnn-1.20200612.095314.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200612.095314
2025-09-16T04:34:28,947   Found link https://files.pythonhosted.org/packages/1b/ae/ecc539a783e43ea9e21e307abf7f6f98bb811b19981785acea455d07b959/returnn-1.20200612.120523.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200612.120523
2025-09-16T04:34:28,947   Found link https://files.pythonhosted.org/packages/68/a0/1a8e3be63474862fe9ae55f075068a5c5d5475b005f35ed354c19170df87/returnn-1.20200624.213954.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200624.213954
2025-09-16T04:34:28,947   Found link https://files.pythonhosted.org/packages/30/b6/61f27a97d2bc461683517ae065f6aaff0b5201ac8e9b65db31c4ce227377/returnn-1.20200805.164244.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200805.164244
2025-09-16T04:34:28,947   Found link https://files.pythonhosted.org/packages/8b/d4/845a08b1feed5065c899cab2bd476893228f674c5f7615017b515744230e/returnn-1.20200817.022854.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200817.022854
2025-09-16T04:34:28,948   Found link https://files.pythonhosted.org/packages/ab/51/3f9e8aa6210455cd81ba12ddd59b0a9750923131a5986e8b4d40842a7be6/returnn-1.20200817.024723.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200817.024723
2025-09-16T04:34:28,948   Found link https://files.pythonhosted.org/packages/bb/02/13a13ef791e5299cd91d5ecdbd848960886218a3ff763d3cf23556704186/returnn-1.20200817.113642.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200817.113642
2025-09-16T04:34:28,948   Found link https://files.pythonhosted.org/packages/9b/8c/d95d79746054c8725f06505a812cac71ba96d58c5130a0bc52ece8e084e9/returnn-1.20200817.121523.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200817.121523
2025-09-16T04:34:28,949   Found link https://files.pythonhosted.org/packages/bd/34/13dd4270628531c254e893026e619758f4e8530e2c7e539f0f71dbd230ee/returnn-1.20200817.125713.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200817.125713
2025-09-16T04:34:28,949   Found link https://files.pythonhosted.org/packages/a6/07/1071d1e89ac9f200db8c0e9fe450e602bfeecea1f3fb71a9b12b436f3a26/returnn-1.20200817.152858.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200817.152858
2025-09-16T04:34:28,949   Found link https://files.pythonhosted.org/packages/91/53/3f0d23c4bdab55f87860184b0e60fecc9744ec155e15c13717f1a5f41c1e/returnn-1.20200817.170003.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200817.170003
2025-09-16T04:34:28,949   Found link https://files.pythonhosted.org/packages/10/8f/b983937d893e903487a22626995078450c7c8f3b9e44c7ff59699a318596/returnn-1.20200818.130846.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200818.130846
2025-09-16T04:34:28,950   Found link https://files.pythonhosted.org/packages/97/4c/7487cd6294ff8ea92a6443ca078d5f412ba4cdaf5a7d3f6ac8a165c9684a/returnn-1.20200818.132012.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200818.132012
2025-09-16T04:34:28,950   Found link https://files.pythonhosted.org/packages/8e/4f/3939c6566457483bb61c9d01a1f4634d15fe4a14da0c98bd25a2742c59fe/returnn-1.20200818.143322.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200818.143322
2025-09-16T04:34:28,950   Found link https://files.pythonhosted.org/packages/27/c2/e5bee53cd26f82076a2b3ce62c36313cf9a736685e4054df3863e771810d/returnn-1.20200818.144809.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200818.144809
2025-09-16T04:34:28,950   Found link https://files.pythonhosted.org/packages/32/b6/f06a0ba1dceb3381c0c43999dd38af225bd6f847595d70e1c3db9beb55be/returnn-1.20200819.023609.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200819.023609
2025-09-16T04:34:28,951   Found link https://files.pythonhosted.org/packages/56/a9/8b43977aa86b334ccc6632756534ef985cad9a65a5b78b6bf2c04c944cfe/returnn-1.20200820.124420.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200820.124420
2025-09-16T04:34:28,951   Found link https://files.pythonhosted.org/packages/bb/0f/e073db6a29c3152a941528be08aadeeb467f69d18998f714348248f0e81f/returnn-1.20200820.143214.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200820.143214
2025-09-16T04:34:28,951   Found link https://files.pythonhosted.org/packages/83/e9/f75f8d8497d9dc2de64330098aa1808dd52b036be32c0e984aafa6d98501/returnn-1.20200820.192900.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200820.192900
2025-09-16T04:34:28,952   Found link https://files.pythonhosted.org/packages/c8/bc/b90aa031409d94eae60beccd7ccef50d3592de7483a3b0525ad408ace1d4/returnn-1.20200821.002857.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200821.002857
2025-09-16T04:34:28,952   Found link https://files.pythonhosted.org/packages/ea/d2/f01c55232ac48807e866480efb2eb777902852981db9b52245fd58fb29a6/returnn-1.20200821.113908.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200821.113908
2025-09-16T04:34:28,952   Found link https://files.pythonhosted.org/packages/ec/ae/843e4a5805d63591b8e4e914b912ceec38b28eda21274cef81638a19def5/returnn-1.20200821.143920.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200821.143920
2025-09-16T04:34:28,952   Found link https://files.pythonhosted.org/packages/5e/2c/506b5dfde0f30baaa2a649fa72cfecbe39ffe5b8550bec313b10865d6652/returnn-1.20200821.170348.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200821.170348
2025-09-16T04:34:28,953   Found link https://files.pythonhosted.org/packages/a2/8d/80881adef1ce9652efd2136d005dffe8a2e411aecb1cf43d4097c120c09f/returnn-1.20200821.181621.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200821.181621
2025-09-16T04:34:28,953   Found link https://files.pythonhosted.org/packages/98/9e/7e8b55cee49ff5880c990c210f023508d3703a1929c6ed8f8b251174d770/returnn-1.20200821.194939.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200821.194939
2025-09-16T04:34:28,953   Found link https://files.pythonhosted.org/packages/0c/2f/e7926ba1982f3a0e2d262087623911a2b3bca15877600c2bf3af82b62551/returnn-1.20200822.011450.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200822.011450
2025-09-16T04:34:28,954   Found link https://files.pythonhosted.org/packages/b0/a2/2ca0f6a96327a86f75409b272f92e025aeecd017c2845014a09c4ebe67f5/returnn-1.20200823.005813.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200823.005813
2025-09-16T04:34:28,954   Found link https://files.pythonhosted.org/packages/4f/0e/7c1482f7287eab9f7f4756baa6454866eb52333d140b2f683e9215c181b8/returnn-1.20200823.135435.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200823.135435
2025-09-16T04:34:28,954   Found link https://files.pythonhosted.org/packages/57/97/6a69c9d20a8cff54c77b6d3524b27cc16f2b827ca11bc25e32b0ee91887e/returnn-1.20200823.175212.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200823.175212
2025-09-16T04:34:28,954   Found link https://files.pythonhosted.org/packages/0a/57/e5717848cf36924e9772e24c6bdd85410ec545d205ec1398840c77322df2/returnn-1.20200825.124251.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200825.124251
2025-09-16T04:34:28,955   Found link https://files.pythonhosted.org/packages/b6/9b/2ff7a3ce0cc9ada223fdbeb1fd01f7558d2064aa3f66a12b851cf1bfb688/returnn-1.20200825.130214.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200825.130214
2025-09-16T04:34:28,955   Found link https://files.pythonhosted.org/packages/54/37/004920422ffaa935fe99ef1f43ea95b79135758004996e87f79972c5c677/returnn-1.20200825.162309.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200825.162309
2025-09-16T04:34:28,955   Found link https://files.pythonhosted.org/packages/df/10/5abc4c531893f2404c06b70eefa145d048d8d51f5b39f895a03ab7eb5a96/returnn-1.20200825.174434.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200825.174434
2025-09-16T04:34:28,955   Found link https://files.pythonhosted.org/packages/1c/ec/ffd56483f99676673e2b25588e7af4ea8dfd69867a4d3312d833619e6c6a/returnn-1.20200827.133816.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200827.133816
2025-09-16T04:34:28,956   Found link https://files.pythonhosted.org/packages/66/83/e178c96fd330f9efea8b0d116aefff0bd03e64644e8d959772c4085bb49e/returnn-1.20200827.163113.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200827.163113
2025-09-16T04:34:28,956   Found link https://files.pythonhosted.org/packages/df/bb/b5f9f3090891e15e692b71ee85769b8808bc0e74c447e148631d66e3f63f/returnn-1.20200827.184707.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200827.184707
2025-09-16T04:34:28,956   Found link https://files.pythonhosted.org/packages/19/9c/fbd87bf26650bcb1f774a0a6c10157f1aa5632f328672ebf2dce3fe3cbbf/returnn-1.20200828.001034.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200828.001034
2025-09-16T04:34:28,957   Found link https://files.pythonhosted.org/packages/6c/73/9127b7c01ae80ba7d34ac99d7974ba5b67ef19517b82e6817ac15c0d2dc0/returnn-1.20200829.125329.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200829.125329
2025-09-16T04:34:28,957   Found link https://files.pythonhosted.org/packages/44/6b/4dad8795c3bc68f157c3805caa16b8cfa0271ad4921e181c07433df61119/returnn-1.20200831.203155.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200831.203155
2025-09-16T04:34:28,957   Found link https://files.pythonhosted.org/packages/f8/80/1134963e7370b93a8aa393d2daea81485075a56cdd4b4bf7de2d57783550/returnn-1.20200901.204729.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200901.204729
2025-09-16T04:34:28,957   Found link https://files.pythonhosted.org/packages/8a/29/45ac469ad6fbaa4dcdec732c177b3964fb8b698db89ca4d80a00f30f26e6/returnn-1.20200901.211539.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200901.211539
2025-09-16T04:34:28,958   Found link https://files.pythonhosted.org/packages/86/a2/2371fe782b7c4bc21991a0ca94ddf795ba776c0e08e6ca69742ae2adf3ac/returnn-1.20200902.93639.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200902.93639
2025-09-16T04:34:28,958   Found link https://files.pythonhosted.org/packages/68/cb/b290ab136c26faddae40cabe197bd62a48734a946ddf19adc79f8a6b2e95/returnn-1.20200902.185300.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200902.185300
2025-09-16T04:34:28,958   Found link https://files.pythonhosted.org/packages/e0/f5/d88e81d462a4680602d20dda964011760fd0785022ce5dc21c3eeaa634c5/returnn-1.20200902.201558.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200902.201558
2025-09-16T04:34:28,958   Found link https://files.pythonhosted.org/packages/89/21/f1398893de683277b67265ea696f1a52926e13a1a101725fea7048a05878/returnn-1.20200902.211944.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200902.211944
2025-09-16T04:34:28,959   Found link https://files.pythonhosted.org/packages/86/64/8128f175fd9865224b6106bdb329e9d8da2aa684fe1259420ead13ac8dd9/returnn-1.20200910.105058.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200910.105058
2025-09-16T04:34:28,959   Found link https://files.pythonhosted.org/packages/08/b5/7540bc831131b7702efa5e9d318e6c9c17e2863e1ddbe04b091d5fbbd01c/returnn-1.20200914.085627.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200914.085627
2025-09-16T04:34:28,959   Found link https://files.pythonhosted.org/packages/9f/cf/256dba03cf0a6aed9f5789e39205c6e2af70aa85b65aa6fb063abe7d32eb/returnn-1.20200921.114905.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200921.114905
2025-09-16T04:34:28,959   Found link https://files.pythonhosted.org/packages/47/65/b0548039de8cc778174ca3785a450056b3a9f158eb6d2af8094c37d090e6/returnn-1.20200922.151321.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200922.151321
2025-09-16T04:34:28,960   Found link https://files.pythonhosted.org/packages/cc/51/bff6ee57b2320349d4527473db6b7ac376335cd640c898e8cc9de0fa00c7/returnn-1.20200925.120941.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200925.120941
2025-09-16T04:34:28,960   Found link https://files.pythonhosted.org/packages/db/fd/d51e6dd9489648a8038322b1979c2fb6c5992b4b55eb388cee332eca065f/returnn-1.20200926.160535.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20200926.160535
2025-09-16T04:34:28,960   Found link https://files.pythonhosted.org/packages/d3/cc/fd2911dd56d9d5527a6a3ca757cab9f9f0d83a6fd84302510909e3012b40/returnn-1.20201005.154453.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20201005.154453
2025-09-16T04:34:28,961   Found link https://files.pythonhosted.org/packages/fa/41/3ef3387f49634855af3a40b4cf8d8d68a1d114b39e4a8fa28af6b05f9bd1/returnn-1.20201007.123557.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20201007.123557
2025-09-16T04:34:28,961   Found link https://files.pythonhosted.org/packages/cb/f4/c4c2eddc2bcc80bf1b47dfcdd5a242e6e60074be6f0211d70ccae43c2109/returnn-1.20201007.162201.tar.gz (from https://pypi.org/simple/returnn/), version: 1.20201007.162201
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