Bug 2503877

Summary: erlang-jsx: FTBFS in Fedora rawhide/f45
Product: [Fedora] Fedora Reporter: Fedora Release Engineering <releng>
Component: erlang-jsxAssignee: Peter Lemenkov <lemenkov>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: i, lemenkov
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: erlang-jsx-3.1.0-20.fc45 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-08-07 11:24:44 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2433833    
Attachments:
Description Flags
build.log
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root.log
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state.log none

Description Fedora Release Engineering 2026-07-21 18:28:55 UTC 
erlang-jsx failed to build from source in Fedora rawhide/f45

https://koji.fedoraproject.org/koji/taskinfo?taskID=147849218


For details on the mass rebuild see:

https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild
Please fix erlang-jsx at your earliest convenience and set the bug's status to
ASSIGNED when you start fixing it. If the bug remains in NEW state for 8 weeks,
erlang-jsx will be orphaned. Before branching of Fedora 46,
erlang-jsx will be retired, if it still fails to build.

For more details on the FTBFS policy, please visit:
https://docs.fedoraproject.org/en-US/fesco/Fails_to_build_from_source_Fails_to_install/
Comment 1 Fedora Release Engineering 2026-07-21 18:29:02 UTC 
Created attachment 2149774 [details]
build.log

file build.log too big, will only attach last 32768 bytes
Comment 2 Fedora Release Engineering 2026-07-21 18:29:08 UTC 
Created attachment 2149775 [details]
root.log

file root.log too big, will only attach last 32768 bytes
Comment 3 Fedora Release Engineering 2026-07-21 18:29:11 UTC 
Created attachment 2149776 [details]
state.log
Comment 4 Peter Lemenkov 2026-08-07 11:24:44 UTC 
Fixed in erlang-jsx-3.1.0-20.fc45.

The FTBFS was caused by an OTP 27 change where -0.0 and 0.0 are now distinct values. The test expected {float, 0.0} when decoding JSON "-0.0" but got {float, -0.0}. Fixed by applying upstream PR #162 which corrects the test expectation for -0.0 and adds an explicit 0.0 test case.